Sugary Drinks and Rheumatoid Arthritis Linked?

Nov. 1, 2013 (San Diego)- Women who drink one or more sugar-sweetened sodas a day might raise their risk of getting rheumatoid arthritis, according to a new study that links RA risk to the sugary habit. The study does not prove cause and effect.

Other studies have linked sugary drinks to higher risks of obesity, diabetes, and heart disease, among other health problems.

The new study is believed to be the first to look at sugary beverages and RA. It did not include diet sodas.

About 1.3 million Americans have RA, a chronic and potentially disabling disease that causes pain, stiffness, and swelling in the joints, and limits how well they work.

''We found an association only for sugar-sweetened beverages," says Yang Hu, a researcher at Harvard School of Public Health who conducted the study. Hu presented the findings this week at the American College of Rheumatology annual meeting.

The link does not mean that sodas cause RA, Hu says. He says drinking sodas could reflect other lifestyle habits known to boost RA risk, such as smoking.

The American Beverage Association, an industry group, disputes the findings.

Hu and his colleagues looked at data from two large studies of nurses, which have evaluated diets and other data for decades.

Hu looked at the diet and other health information from about 173,000 women during two different time periods. Every 4 years, the women reported how many sugary beverages they drank. This included regular colas with sugar, caffeine-free colas with sugar, and non-cola sodas. Diet soda was not included.

During the time periods studied, 883 women were diagnosed with RA. Hu found those who drank one or more sugar-sweetened beverages a day, compared to those who drank either none or less than one a month, had a higher risk of getting a form of RA known as seropositive. It is often a more severe form of the disease.

The way the study was done has limitations. People often don’t accurately remember  what they ate or drank in the past.

The American Beverage Association says it needs more detail to fully evaluate the study. 

“The National Institute of Arthritis and Musculoskeletal and Skin Diseases notes that while the causes of rheumatoid arthritis are not known, genetic and hormonal factors are considered the most likely causes and women are more likely than men to develop this autoimmune inflammatory disease,” its statement says.

The study is interesting and the link is potentially plausible, says Eric Ruderman, MD, professor of medicine at Northwestern University Feinberg School of Medicine. He reviewed the findings but was not involved in the study.

"We're always looking at what drives risk in RA,'' he says. The disease has both genetic and environmental components, experts know. Those factors weren't taken into account in the study. The next step, he says, is to ''drill down into the pathology and try to understand why.''

The National Institutes of Health funded the study.

These findings were presented at a medical conference. They should be considered preliminary, as they have not yet undergone the "peer review" process, in which outside experts scrutinize the data prior to publication in a medical journal.

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Aircraft noise linked to increased health risks

Living underneath the Heathrow flightpath is noisy.... ....and now British researchers say it can be bad for your health. More than three-and-a-half-million people can hear planes taking off and landing at London's biggest airport on a daily basis. Researchers at London's Imperial College studied hospital admissions and death rates due to stroke and heart disease over a five-year period in the areas most affected. Lead author Dr Anna Hansell says their findings were significant, particularly in areas closest to the airport. SOUNDBITE (English) LEAD AUTHOR OF STUDY ON AIRCRAFT NOISE, ANNA HANSELL, SAYING: "We found around a 10 to 20 percent increased risk of both hospital admissions and deaths from heart disease and stroke, and that was associated both with the highest levels of the daytime noise and the highest levels of the night-time noise." Hansell says aircraft noise can reduce people's sleep and cause anxiety, while repeated exposure to sudden noises can cause what she calls, a 'startle reaction'. SOUNDBITE (English) LEAD AUTHOR OF STUDY ON AIRCRAFT NOISE, ANNA HANSELL, SAYING: "There's a startle reaction when you hear a loud noise, so your heart rate goes up, your blood pressure goes up, and it may be that if you're exposed to loud noise over a long period of time that your blood pressure just stays up rather than going back down again to normal." John Stewart, who leads a campaign to prevent further expansion of Heathrow, hopes the survey will lend weight to his cause. SOUNDBITE (English) CHAIR OF AIRCRAFT NOISE CAMPAIGN GROUP HACAN, JOHN STEWART, SAYING: "So many people living under the flight path tell us it affects their health. Sometimes it's people who are woken up every morning when the first plane comes in at five thirty, they can't sleep, they're stressed out. Other times, it's people during a day saying that this constant noise is really getting on their nerves, they're taking tablets, they feel stressed out and, I'm sure, as the study shows, it eventually affects their health." It's not just adults who are affected. Hounslow Heath Primary School has built noise-proof structures in the playground for pupils driven to distraction by aircraft overhead. UPSOT: PLANE ABOVE But not everybody is bothered by the noise. SOUNDBITE (English) HATTON CROSS RESIDENT, CLIVE THORP, SAYING: "I'm 70 now and I've lived here and near here, all my life, and I'm still going strong." SOUNDBITE (English) HOUNSLOW RESIDENT, SAYING: "They put nice windows, it's no noises, you can hear nothing here, it's no problem." A separate study conducted in the US has produced similar results, linking airport noise to higher hospital admission rates. But Anna Hansell says that while the results may be a cause for concern, other factors like smoking and poor diet are far worse.

Oct. 29 - UK researchers say long-term exposure to aircraft noise increases the risk of heart disease and stroke. A five year study focusing on the noise produced by planes flying in and out of Heathrow reveals a higher rate of hospitalisation for people living near the airport than for those who live in quieter environments. Jim Drury has more.

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Even Low Arsenic Exposure Linked With Heart Disease Risk

By Rachael Rettner, Senior Writer
Published: 09/24/2013 11:15 AM EDT on LiveScience

Exposure to even low levels of arsenic in drinking water and food may increase the risk of developing, and dying from, heart disease, a new study suggests.

In the study, researchers analyzed urine samples from 3,575 American Indians in Arizona, Oklahoma and North and South Dakota, living in regions where arsenic levels in drinking water were "low to moderate," meaning they were above the limit set by the U.S. Environmental Protection Agency, which is 10 micrograms per liter, but below 100 micrograms per liter.

Urine samples were collected between 1989 and 1991, and the participants were divided into four groups based on the concentration of inorganic arsenic in their urine. (There are two types of arsenic, organic and inorganic, inorganic arsenic is thought to be more toxic).

The participants were followed until 2008, and those in the group with the highest urine arsenic concentrations were 32 percent more likely to develop cardiovascular disease, and 65 percent more likely to die from the condition over the nearly 20-year period, compared to the people in the group with the lowest arsenic urine concentrations. [7 Foods You Can Overdose On]

The findings held after the researchers took into account certain risk factors for heart disease, such as smoking and high body mass index. However, the strength of the link declined slightly after the researchers took into account other risk factors: high blood pressure, diabetes and liver disease, suggesting that these factors may explain part of the link between arsenic exposure and cardiovascular disease risk, the researchers said.

While previous studies have linked high levels of arsenic exposure to increased risk of cancer and heart disease, few studies have looked at the effects of low to moderate exposure.

In 2001, the EPA estimated that the drinking water of 13 million Americans had arsenic levels above the limit of 10 micrograms per liter. People can also consume the element through their food, although no limit has been set for food.

Recently, the Food and Drug Administration set a limit for the amount of arsenic in apple juice, but has not done so for food. Concerns have been raised over levels in rice, but after testing, the agency said that levels of arsenic in rice were too low to pose health risks over the short term, although it said more research on the long-term health effects is needed.

"Given the large population exposed, even a modest increased risk of cardiovascular disease due to arsenic could have important public health implications," the researchers wrote in Monday's (Sept. 23) issue of the journal Annals of Internal Medicine. "These findings support the importance of low to moderate arsenic exposure as a cardiovascular risk factor with no apparent threshold," they said.

Because the study involved American Indian populations, who are at an increased risk for diabetes, the findings would be particularly applicable to other groups that also have a high diabetes risk, said study researcher Dr. Ana Navas-Acien, an associate professor of environmental health sciences and epidemiology at Johns Hopkins Bloomberg School of Public Health.

The results are based on a single measurement of urine arsenic levels, which took place at the study's start, so it's not clear if the study participants' levels would have remained the same over time. However, a separate analysis done by the researchers showed that the measurement taken at the study's start was generally consistent with measurements taken at two other points.

It's not clear how arsenic exposure might increase the risk of heart disease, and the study cannot prove that arsenic exposure causes heart disease. Diabetes, high blood pressure and liver disease -- which were more common among those with the highest urine arsenic concentrations -- could play a role.

It could also be that some other factor, related to both arsenic exposure and cardiovascular disease risk, could explain the link, Navas-Acien said. Studies in animals suggest that arsenic exposure increases the risk of developing plaques in the arteries, or arteriosclerosis, which can cause heart disease.

Follow Rachael Rettner @RachaelRettner. Follow LiveScience @livescience, Facebook & Google+. Original article on LiveScience.

Copyright 2013 LiveScience, a TechMediaNetwork company. All rights reserved. This material may not be published, broadcast, rewritten or redistributed. ]]>

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March 29, 2013 [Initial Announcement]: Multistate Outbreak of Shiga toxin-producing Escherichia coli O121 Infections Linked to Farm Rich Brand Frozen Food Products

This particular outbreak appears to be over. However, E. coli is still an important cause of human illness in the United States. More information about E. coli, and steps people can take to reduce their risk of infection, can be found on the CDC E. coli Web Page.

CDC collaborated with public health officials in several states, the U.S. Department of Agriculture’s Food Safety and Inspection Service (USDA-FSIS), and the U.S. Food and Drug Administration (FDA) to investigate a multistate outbreak of Shiga toxin-producing Escherichia coli O121 (STEC O121) infections linked to Farm Rich brand frozen food products produced by Rich Products Corporation of Buffalo, New York.

Public health investigators used DNA "fingerprints" of E. coli bacteria obtained through diagnostic testing with pulsed-field gel electrophoresis (PFGE) to identify cases of illness that were part of this outbreak. They used data from PulseNet, the national subtyping network made up of state and local public health laboratories and federal food regulatory laboratories that performs molecular surveillance of foodborne infections.

A total of 35 individuals infected with the outbreak strain of STEC O121 were reported from 19 states. The number of ill persons identified in each state was as follows: Alabama (1), Arkansas (1), California (1), Colorado (1), Florida (2), Illinois (2), Indiana (2), Michigan (3), Missouri (1), Mississippi (1), New York (4), Ohio (6), Pennsylvania (1), South Dakota (1), Texas (3), Utah (1), Virginia (1), Washington (1), and Wisconsin (2).

Illness onset dates ranged from December 30, 2012 to April 15, 2013. Ill persons ranged in age from less than 1 year to 75 years, with a median age of 17 years. Eighty-two percent of ill persons were 21 years of age or younger. Sixty percent of ill persons were female. Among 29 persons for whom information was available, 9 (31%) were hospitalized. Two ill people developed hemolytic uremic syndrome (HUS), a type of kidney failure, and no deaths were reported.

This outbreak appears to be over. However, many of these products have a long shelf-life, and they may still be in peoples’ freezers. Consumers unaware of the recall could continue to eat these products and potentially get sick.

E. coli is an important cause of human illness in the United States. More information about E. coli and steps people can take to reduce their risk for infection can be found on the CDC E. coli homepage.

Epidemiologic, laboratory, and traceback investigations conducted by officials in local, state, and federal public health, agriculture, and regulatory agencies linked this outbreak to Farm Rich brand frozen food products.

State and federal public health officials interviewed ill persons to obtain information regarding foods they might have eaten and other exposures in the week before illness. Twenty-four (100%) of 24 ill persons interviewed reported consuming frozen food products. Thirteen (68%) of 19 ill persons reported consuming Farm Rich brand frozen food products.

The outbreak strain of STEC O121 was identified in two different Farm Rich brand frozen products collected from the homes of two ill persons in New York and Texas.

On April 4, 2013, Rich Products Corporation recalled all of its Farm Rich, Market Day, and Schwan’s brand frozen food products produced at its Waycross, Georgia plant between June 1, 2011 and March 29, 2013 due to possible contamination with E. coli O121.

USDA-FSIS and FDA investigated suppliers of the common ingredients in the various types of Farm Rich brand frozen products consumed by ill persons, but the source of contamination was not identified. Rich Products Corporation is not currently producing products at its Waycross, Georgia plant, while the company continues to work with USDA-FSIS to develop a plan to make food safety improvements.

A total of 35 individuals infected with the outbreak strain of STEC O121 were reported from 19 states. There were no new illnesses reported since the last update.

Illness onset dates ranged from December 30, 2012 to April 15, 2013. Ill persons ranged in age from less than 1 year to 75 years, with a median age of 17 years. Eighty-two percent of ill persons were 21 years of age or younger. Sixty percent of ill persons were female. Among 29 persons for whom information was available, 9 (31%) were hospitalized. Two ill people developed hemolytic uremic syndrome (HUS), a type of kidney failure, and no deaths were reported.

A total of 35 individuals infected with the outbreak strain of STEC O121 have been reported from 19 states. Three additional ill persons have been reported from Missouri (1) and Ohio (2).

Among persons for whom information is available, illness onset dates range from December 30, 2012 to April 15, 2013. Ill persons range in age from one year to 75 years, with a median age of 17 years. Eighty-two percent of ill persons are 21 years of age or younger. Sixty percent of ill persons are female. Among 29 persons with available information, 9 (31%) reported being hospitalized. Two ill people developed hemolytic uremic syndrome (HUS), a type of kidney failure, and no deaths have been reported.

Illnesses that occurred after April 10, 2013 might not be reported yet due to the time it takes between when a person becomes ill and when the illness is reported.

Twenty-four (100%) of 24 ill persons interviewed reported consuming frozen food products. Twelve (63%) of 19 ill persons reported consuming Farm Rich brand frozen food products. Investigations are ongoing to determine the specific types and sources of frozen food that might be linked with illness, as well as to determine which particular ingredients or components of these products may be contaminated.

A total of 32 individuals infected with the outbreak strain of STEC O121 have been reported from 18 states. Five additional ill persons have been reported from California (1), Colorado (1), Florida (2), and Ohio (1).

Among persons for whom information is available, illness onset dates range from December 30, 2012 to April 2, 2013. Ill persons range in age from one year to 75 years, with a median age of 17 years. Eighty-one percent of ill persons are 21 years of age or younger. Fifty-six percent of ill persons are female. Among 26 persons with available information, 9 (35%) reported being hospitalized. Two ill people developed hemolytic uremic syndrome (HUS), a type of kidney failure, and no deaths have been reported.

Illnesses that occurred after March 30, 2013 might not be reported yet due to the time it takes between when a person becomes ill and when the illness is reported.

A total of 27 individuals infected with the outbreak strain of STEC O121 have been reported from 15 states. Three new cases have been reported from Illinois (1), Michigan (1) and New York (1).

Among persons for whom information is available, illness onset dates range from December 30, 2012 to March 18, 2013. Ill persons range in age from 2 years to 75 years, with a median age of 17 years. Eighty-one percent of ill persons are 21 years of age or younger. Fifty-six percent of ill persons are female. Among 23 persons with available information, 8 (35%) reported being hospitalized. Two ill people developed hemolytic uremic syndrome (HUS), a type of kidney failure, and no deaths have been reported.

Illnesses that occurred after March 10, 2013 might not be reported yet due to the time it takes between when a person becomes ill and when the illness is reported.

Twenty (100%) of 20 ill persons interviewed reported consuming frozen food products. Ten (63%) of 16 ill persons reported consuming Farm Rich brand frozen food products. Investigations are ongoing to determine the specific types and sources of frozen food that might be linked with illness, as well as to determine which particular ingredients or components of these products may be contaminated.

Testing conducted by the Outbreaks Section of the USDA-FSIS Eastern Laboratory identified the outbreak strain of STEC O121 from individually wrapped Farm Rich brand frozen mini pizza slices from an opened package collected from an ill person’s home in Texas. The frozen mini pizza slices were included in the products that were recalled on March 28, 2013.

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CDC is collaborating with public health officials in many states, the U.S. Department of Agriculture’s Food Safety and Inspection Service (USDA-FSIS), and the U.S. Food and Drug Administration (FDA) to investigate a multistate outbreak of Shiga toxin-producing Escherichia coli O121 (STEC O121) infections. Public health investigators are using DNA "fingerprints" of E. coli bacteria obtained through diagnostic testing with pulsed-field gel electrophoresis, or PFGE, to identify cases of illness that could be part of this outbreak. They are using data from PulseNet, the national subtyping network made up of state and local public health laboratories and federal food regulatory laboratories that performs molecular surveillance of foodborne infections.

The type of bacteria responsible for this outbreak is among those referred to as Shiga toxin-producing E. coli or STEC. Some types of STEC frequently cause severe disease, including bloody diarrhea and hemolytic uremic syndrome (HUS), which is a type of kidney failure. STEC bacteria are divided into serogroups (e.g., O157 or O121). E. coli O157 is the STEC serogroup found most commonly in U.S. patients. Other E. coli serogroups in the STEC group, including O121, are sometimes called "non-O157 STECs." Because clinical laboratories typically cannot directly identify non-O157 STEC serogroups, they must first test stool samples for the presence of Shiga toxins.  Then, the positive samples must be sent to public health laboratories to look for non-O157 STEC. In recent years, the number of clinical laboratories that test for Shiga toxin has increased greatly, but some laboratories still do not perform these tests. Because of these complexities, many non-O157 STEC infections are probably not identified. The STEC O121 PFGE pattern in this outbreak is rare. In the past it has been seen less than 30 times in PulseNet.

A total of 24 individuals infected with the outbreak strain of STEC O121 have been reported from 15 states. The number of ill persons identified in each state is as follows: Alabama (1), Arkansas (1), Illinois (1), Indiana (2), Michigan (2), Mississippi (1), New York (3), Ohio (3), Pennsylvania (1), South Dakota (1), Texas (3), Utah (1), Virginia (1), Washington (1), and Wisconsin (2).

Among persons for whom information is available, illness onset dates range from December 30, 2012 to March 9, 2013. Ill persons range in age from 2 years to 75 years, with a median age of 17 years. Seventy-eight percent of ill persons are 21 years of age or younger. Sixty-three percent of ill persons are female. Among 21 persons with available information, 7 (33%) reported being hospitalized. One ill person developed HUS, and no deaths have been reported.

The outbreak can be visually described with a chart showing the number of people who became ill each day or week. This chart is called an epi curve. Illnesses that occurred after March 1, 2013 might not be reported yet due to the time it takes between when a person becomes ill and when the illness is reported. This takes an average of 2 to 3 weeks. For more details, please see Timeline for Reporting E. coli Cases.

Epidemiologic, laboratory, and traceback investigations conducted by officials in local, state, and federal public health, agriculture, and regulatory agencies indicate that Farm Rich brand frozen food products are one likely source of this outbreak of STEC O121 infections.

In interviews, ill persons answered questions about food consumed and other exposures during the week before becoming ill. Eighteen (100%) of 18 ill persons interviewed reported consuming frozen food products. Eight (57%) of 14 ill persons reported consuming Farm Rich brand frozen food products. Investigations are ongoing to determine the specific types and sources of frozen food that might be linked with illness, as well as to determine which particular ingredients or components of these products may be contaminated.

The New York State Department of Health, Wadsworth Center Laboratory, identified the outbreak strain of E. coli O121 in an opened package of Farm Rich brand frozen mini chicken and cheese quesadillas from an ill person’s home.

CDC and state and local public health partners are continuing laboratory surveillance through PulseNet to identify additional ill persons and to interview ill persons about foods eaten before becoming ill. FSIS and FDA are continuing to work closely with CDC and state partners during this investigation.

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May 30, 2013 [Final Update]: Multistate Outbreak of Shiga toxin-producing Escherichia coli O121 Infections Linked to Farm Rich Brand Frozen Food Products

This particular outbreak appears to be over. However, E. coli is still an important cause of human illness in the United States. More information about E. coli, and steps people can take to reduce their risk of infection, can be found on the CDC E. coli Web Page.

CDC collaborated with public health officials in several states, the U.S. Department of Agriculture’s Food Safety and Inspection Service (USDA-FSIS), and the U.S. Food and Drug Administration (FDA) to investigate a multistate outbreak of Shiga toxin-producing Escherichia coli O121 (STEC O121) infections linked to Farm Rich brand frozen food products produced by Rich Products Corporation of Buffalo, New York.

Public health investigators used DNA "fingerprints" of E. coli bacteria obtained through diagnostic testing with pulsed-field gel electrophoresis (PFGE) to identify cases of illness that were part of this outbreak. They used data from PulseNet, the national subtyping network made up of state and local public health laboratories and federal food regulatory laboratories that performs molecular surveillance of foodborne infections.

A total of 35 individuals infected with the outbreak strain of STEC O121 were reported from 19 states. The number of ill persons identified in each state was as follows: Alabama (1), Arkansas (1), California (1), Colorado (1), Florida (2), Illinois (2), Indiana (2), Michigan (3), Missouri (1), Mississippi (1), New York (4), Ohio (6), Pennsylvania (1), South Dakota (1), Texas (3), Utah (1), Virginia (1), Washington (1), and Wisconsin (2).

Illness onset dates ranged from December 30, 2012 to April 15, 2013. Ill persons ranged in age from less than 1 year to 75 years, with a median age of 17 years. Eighty-two percent of ill persons were 21 years of age or younger. Sixty percent of ill persons were female. Among 29 persons for whom information was available, 9 (31%) were hospitalized. Two ill people developed hemolytic uremic syndrome (HUS), a type of kidney failure, and no deaths were reported.

This outbreak appears to be over. However, many of these products have a long shelf-life, and they may still be in peoples’ freezers. Consumers unaware of the recall could continue to eat these products and potentially get sick.

E. coli is an important cause of human illness in the United States. More information about E. coli and steps people can take to reduce their risk for infection can be found on the CDC E. coli homepage.

Epidemiologic, laboratory, and traceback investigations conducted by officials in local, state, and federal public health, agriculture, and regulatory agencies linked this outbreak to Farm Rich brand frozen food products.

State and federal public health officials interviewed ill persons to obtain information regarding foods they might have eaten and other exposures in the week before illness. Twenty-four (100%) of 24 ill persons interviewed reported consuming frozen food products. Thirteen (68%) of 19 ill persons reported consuming Farm Rich brand frozen food products.

The outbreak strain of STEC O121 was identified in two different Farm Rich brand frozen products collected from the homes of two ill persons in New York and Texas.

On April 4, 2013, Rich Products Corporation recalled all of its Farm Rich, Market Day, and Schwan’s brand frozen food products produced at its Waycross, Georgia plant between June 1, 2011 and March 29, 2013 due to possible contamination with E. coli O121.

USDA-FSIS and FDA investigated suppliers of the common ingredients in the various types of Farm Rich brand frozen products consumed by ill persons, but the source of contamination was not identified. Rich Products Corporation is not currently producing products at its Waycross, Georgia plant, while the company continues to work with USDA-FSIS to develop a plan to make food safety improvements.

A total of 35 individuals infected with the outbreak strain of STEC O121 were reported from 19 states. There were no new illnesses reported since the last update.

Illness onset dates ranged from December 30, 2012 to April 15, 2013. Ill persons ranged in age from less than 1 year to 75 years, with a median age of 17 years. Eighty-two percent of ill persons were 21 years of age or younger. Sixty percent of ill persons were female. Among 29 persons for whom information was available, 9 (31%) were hospitalized. Two ill people developed hemolytic uremic syndrome (HUS), a type of kidney failure, and no deaths were reported.

A total of 35 individuals infected with the outbreak strain of STEC O121 have been reported from 19 states. Three additional ill persons have been reported from Missouri (1) and Ohio (2).

Among persons for whom information is available, illness onset dates range from December 30, 2012 to April 15, 2013. Ill persons range in age from one year to 75 years, with a median age of 17 years. Eighty-two percent of ill persons are 21 years of age or younger. Sixty percent of ill persons are female. Among 29 persons with available information, 9 (31%) reported being hospitalized. Two ill people developed hemolytic uremic syndrome (HUS), a type of kidney failure, and no deaths have been reported.

Illnesses that occurred after April 10, 2013 might not be reported yet due to the time it takes between when a person becomes ill and when the illness is reported.

Twenty-four (100%) of 24 ill persons interviewed reported consuming frozen food products. Twelve (63%) of 19 ill persons reported consuming Farm Rich brand frozen food products. Investigations are ongoing to determine the specific types and sources of frozen food that might be linked with illness, as well as to determine which particular ingredients or components of these products may be contaminated.

A total of 32 individuals infected with the outbreak strain of STEC O121 have been reported from 18 states. Five additional ill persons have been reported from California (1), Colorado (1), Florida (2), and Ohio (1).

Among persons for whom information is available, illness onset dates range from December 30, 2012 to April 2, 2013. Ill persons range in age from one year to 75 years, with a median age of 17 years. Eighty-one percent of ill persons are 21 years of age or younger. Fifty-six percent of ill persons are female. Among 26 persons with available information, 9 (35%) reported being hospitalized. Two ill people developed hemolytic uremic syndrome (HUS), a type of kidney failure, and no deaths have been reported.

Illnesses that occurred after March 30, 2013 might not be reported yet due to the time it takes between when a person becomes ill and when the illness is reported.

A total of 27 individuals infected with the outbreak strain of STEC O121 have been reported from 15 states. Three new cases have been reported from Illinois (1), Michigan (1) and New York (1).

Among persons for whom information is available, illness onset dates range from December 30, 2012 to March 18, 2013. Ill persons range in age from 2 years to 75 years, with a median age of 17 years. Eighty-one percent of ill persons are 21 years of age or younger. Fifty-six percent of ill persons are female. Among 23 persons with available information, 8 (35%) reported being hospitalized. Two ill people developed hemolytic uremic syndrome (HUS), a type of kidney failure, and no deaths have been reported.

Illnesses that occurred after March 10, 2013 might not be reported yet due to the time it takes between when a person becomes ill and when the illness is reported.

Twenty (100%) of 20 ill persons interviewed reported consuming frozen food products. Ten (63%) of 16 ill persons reported consuming Farm Rich brand frozen food products. Investigations are ongoing to determine the specific types and sources of frozen food that might be linked with illness, as well as to determine which particular ingredients or components of these products may be contaminated.

Testing conducted by the Outbreaks Section of the USDA-FSIS Eastern Laboratory identified the outbreak strain of STEC O121 from individually wrapped Farm Rich brand frozen mini pizza slices from an opened package collected from an ill person’s home in Texas. The frozen mini pizza slices were included in the products that were recalled on March 28, 2013.

Top of Page

CDC is collaborating with public health officials in many states, the U.S. Department of Agriculture’s Food Safety and Inspection Service (USDA-FSIS), and the U.S. Food and Drug Administration (FDA) to investigate a multistate outbreak of Shiga toxin-producing Escherichia coli O121 (STEC O121) infections. Public health investigators are using DNA "fingerprints" of E. coli bacteria obtained through diagnostic testing with pulsed-field gel electrophoresis, or PFGE, to identify cases of illness that could be part of this outbreak. They are using data from PulseNet, the national subtyping network made up of state and local public health laboratories and federal food regulatory laboratories that performs molecular surveillance of foodborne infections.

The type of bacteria responsible for this outbreak is among those referred to as Shiga toxin-producing E. coli or STEC. Some types of STEC frequently cause severe disease, including bloody diarrhea and hemolytic uremic syndrome (HUS), which is a type of kidney failure. STEC bacteria are divided into serogroups (e.g., O157 or O121). E. coli O157 is the STEC serogroup found most commonly in U.S. patients. Other E. coli serogroups in the STEC group, including O121, are sometimes called "non-O157 STECs." Because clinical laboratories typically cannot directly identify non-O157 STEC serogroups, they must first test stool samples for the presence of Shiga toxins.  Then, the positive samples must be sent to public health laboratories to look for non-O157 STEC. In recent years, the number of clinical laboratories that test for Shiga toxin has increased greatly, but some laboratories still do not perform these tests. Because of these complexities, many non-O157 STEC infections are probably not identified. The STEC O121 PFGE pattern in this outbreak is rare. In the past it has been seen less than 30 times in PulseNet.

A total of 24 individuals infected with the outbreak strain of STEC O121 have been reported from 15 states. The number of ill persons identified in each state is as follows: Alabama (1), Arkansas (1), Illinois (1), Indiana (2), Michigan (2), Mississippi (1), New York (3), Ohio (3), Pennsylvania (1), South Dakota (1), Texas (3), Utah (1), Virginia (1), Washington (1), and Wisconsin (2).

Among persons for whom information is available, illness onset dates range from December 30, 2012 to March 9, 2013. Ill persons range in age from 2 years to 75 years, with a median age of 17 years. Seventy-eight percent of ill persons are 21 years of age or younger. Sixty-three percent of ill persons are female. Among 21 persons with available information, 7 (33%) reported being hospitalized. One ill person developed HUS, and no deaths have been reported.

The outbreak can be visually described with a chart showing the number of people who became ill each day or week. This chart is called an epi curve. Illnesses that occurred after March 1, 2013 might not be reported yet due to the time it takes between when a person becomes ill and when the illness is reported. This takes an average of 2 to 3 weeks. For more details, please see Timeline for Reporting E. coli Cases.

Epidemiologic, laboratory, and traceback investigations conducted by officials in local, state, and federal public health, agriculture, and regulatory agencies indicate that Farm Rich brand frozen food products are one likely source of this outbreak of STEC O121 infections.

In interviews, ill persons answered questions about food consumed and other exposures during the week before becoming ill. Eighteen (100%) of 18 ill persons interviewed reported consuming frozen food products. Eight (57%) of 14 ill persons reported consuming Farm Rich brand frozen food products. Investigations are ongoing to determine the specific types and sources of frozen food that might be linked with illness, as well as to determine which particular ingredients or components of these products may be contaminated.

The New York State Department of Health, Wadsworth Center Laboratory, identified the outbreak strain of E. coli O121 in an opened package of Farm Rich brand frozen mini chicken and cheese quesadillas from an ill person’s home.

CDC and state and local public health partners are continuing laboratory surveillance through PulseNet to identify additional ill persons and to interview ill persons about foods eaten before becoming ill. FSIS and FDA are continuing to work closely with CDC and state partners during this investigation.

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February 15, 2012 [Announcement]: Multistate Outbreak of E. coli O26 Infections Linked to Raw Clover Sprouts at Jimmy John's Restaurants.

This particular outbreak appears to be over. However, E. coli is still an important cause of human illness in the United States. More information about E. coli, and steps people can take to reduce their risk of infection, can be found on the CDC E. coli Web Page.

A total of 29 individuals infected with the outbreak strain of E. coli O26 have been reported from 11 states. The 4 new cases have been reported from Michigan, Pennsylvania, Washington, and West Virginia. Of the 27 ill persons with available information, 23 (85%) reported consuming sprouts at Jimmy John's restaurants in the 7 days preceding illness.

Among 29 ill persons, illness onset dates ranged from December 25, 2011 to March 3, 2012. Ill persons range in age from 9 years to 57 years old, with a median age of 26 years. Eighty-nine percent of ill persons are female. Among the 29 ill persons, 7 (24%) were hospitalized. None have developed HUS, and no deaths have been reported.

A total of 25 individuals infected with the outbreak strain of E. coli O26 have been reported from 8 states. The 11 new ill persons have been reported from Alabama, Michigan, and Ohio. Of the 24 ill persons with available information, 21 (87%) reported consuming sprouts at Jimmy John's restaurants in the 7 days preceding illness.

Among these 24 ill persons, illness onset dates ranged from December 25, 2011 to February 15, 2012. Ill persons range in age from 9 years to 53 years old, with a median age of 26 years. Eighty-eight percent of ill persons are female. Among the 24 ill persons, 6 (25%) were hospitalized. None have developed HUS, and no deaths have been reported. Illnesses that occurred after February 19, 2012, might not be reported yet due to the time it takes between when a person becomes ill and when the illness is reported.

A total of 14 individuals infected with the outbreak strain of E. coli O26 have been reported from 6 states. The two new cases have been reported from Michigan. Both new cases reported eating at Jimmy John's restaurants and consuming sprouts in the 7 days preceding illness.

Among the 14 persons for whom information is available, illnesses onset dates range from December 25, 2011 to February 7, 2012. Ill persons range in age from 9 years to 49 years old, with a median age of 25 years old. One hundred percent of ill persons are female. Among the 14 ill persons, 2 (14%) were hospitalized. None have developed HUS, and no deaths have been reported. Illnesses that occurred after February 4, 2012, might not be reported yet due to the time it takes between when a person becomes ill and when the illness is reported.

CDC is collaborating with public health officials in multiple states and the U.S. Food and Drug Administration (FDA) to investigate a multistate outbreak of Shiga toxin-producing Escherichia coli serogroup O26 (STEC O26) infections... (show more »)

CDC is collaborating with public health officials in multiple states and the U.S. Food and Drug Administration (FDA) to investigate a multistate outbreak of Shiga toxin-producing Escherichia coli serogroup O26 (STEC O26) infections likely linked with eating raw clover sprouts. Public health investigators are using DNA "fingerprints" of E. coli bacteria obtained through diagnostic testing with pulsed-field gel electrophoresis, or PFGE, to identify cases of illness that may be part of this outbreak. They are using data from PulseNet, the national subtyping network made up of state and local public health laboratories and federal food regulatory laboratories that performs molecular surveillance of foodborne infections.

The type of bacteria responsible for this outbreak are referred to as STEC. STEC bacteria are grouped by serogroups (e.g., O157 or O26). The STEC serogroup found most commonly in U.S. patients is E. coli O157. Other E. coli serogroups in the STEC group, including O26, are sometimes called "non-O157 STECs." Some types of STEC frequently cause severe disease, including bloody diarrhea and hemolytic uremic syndrome (HUS). Others, such as common strains of STEC O26, typically cause milder illness. Currently, there are limited public health surveillance data on the occurrence of non-O157 STECs, including STEC O26; therefore, STEC O26 infections may go undiagnosed or unreported. Because non-O157 STEC infections are more difficult to identify than STEC O157, many clinical laboratories do not test for them. The STEC O26 PFGE pattern in this outbreak has rarely been seen before in PulseNet.

A total of 12 persons infected with the outbreak strain of STEC O26 have been reported from 5 states. The number of ill persons identified in each state is as follows: Iowa (5), Missouri (3), Kansas (2), Arkansas (1), and Wisconsin (1). Among persons for whom information is available, illness onset dates range from December 25, 2011 to January 15, 2012. Ill persons range in age from 9 years to 49 years old, with a median age of 25 years old. One hundred percent of ill persons are female. Among the 12 ill persons, 2 (17%) were hospitalized. None have developed HUS, and no deaths have been reported.

The outbreak can be visually described with a chart showing the number of people who became ill each day. This chart is called an epi curve. Illnesses that occurred after January 27, 2012, might not be reported yet due to the time it takes between when a person becomes ill and when the illness is reported. This takes an average of 2 to 3 weeks. All epi curves for this investigation are available on the epi curve page. Please see the E. coli Outbreak Investigations: Timeline for Reporting Cases for more details. Top of Page

Epidemiologic and traceback investigations conducted by officials in local, state, and federal public health, agriculture, and regulatory agencies have linked this outbreak to eating raw clover sprouts. Among the 11 ill persons with information available, 10 (91%) reported eating at a Jimmy John's sandwich restaurant in the 7 days preceding illness. Ill persons reported eating at 9 different locations of Jimmy John's restaurants in 4 states in the week before becoming ill. One location was identified where more than one ill person reported eating in the week before becoming ill. Among the 10 ill persons who reported eating at a Jimmy John's restaurant location, 8 (80%) reported eating a sandwich containing sprouts, and 9 (90%) reported eating a sandwich containing lettuce. Currently, no other common grocery stores or restaurants are associated with illnesses.

FDA's traceback investigation is ongoing. Preliminary traceback information has identified a common lot of clover seeds used to grow clover sprouts served at Jimmy John's restaurant locations where ill persons ate. FDA and states conducted a traceback that identified two separate sprouting facilities; both used the same lot of seed to grow clover sprouts served at these Jimmy John's restaurant locations. On February 10, 2012, the seed supplier initiated notification of sprouting facilities that received this lot of clover seed to stop using it. Investigations are ongoing to identify other locations that may have sold clover sprouts grown from this seed lot.

This investigation is ongoing, but preliminary results of the epidemiologic and traceback investigations indicate eating raw clover sprouts at Jimmy John's restaurants is the likely cause of this outbreak. CDC and state and local public health partners are continuing laboratory surveillance through PulseNet to identify additional ill persons and to interview ill persons about foods eaten before becoming ill. FDA is continuing to work closely with CDC and state partners during this investigation. CDC will update the public on the progress of this investigation as information becomes available.

Based on previous outbreaks associated with sprouts, investigation findings have demonstrated that sprout seeds might become contaminated in several ways. They could be grown with contaminated water or improperly composted manure fertilizer. They could be contaminated with feces from domestic or wild animals, or with runoff from animal production facilities, or by improperly cleaned growing or processing equipment. Seeds also might become contaminated during harvesting, distribution, or storage. Many clover seeds are produced for agricultural use, so they might not be processed, handled, and stored as human food would. Conditions suitable for sprouting the seed also permit bacteria that might be present on seeds to grow and multiply rapidly.

In 1999, FDA released guidance to help seed producers and sprout growers enhance the safety of their products. Specific measures recommended in the guidelines include a seed disinfection step and microbiologic tests of water that has been used to grow each lot of sprouts. The microbiologic tests currently recommended under this guidance would not identify the presence of STEC O26.

Preliminary results indicate that this strain of E. coli produces Shiga toxin type 1 and does not produce Shiga toxin type 2. (« show less)

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March 23, 2012 [FINAL Update]: Multistate Outbreak of E. coli O157:H7 Infections Linked to Romaine Lettuce

NOTICE: The information on this page is no longer being updated and may have changed. The information is accurate only as of the last page update.

March 23, 2012 (FINAL Update)

As of March 21, 2012, 58 persons infected with the outbreak strain of E. coli serotype O157:H7 were reported from 9 states.Collaborative investigative efforts of state, local, and federal public health and regulatory agencies indicated that romaine lettuce was the likely source of illnesses in this outbreak, and contamination likely occurred before the product reached retail stores.This particular outbreak appears to be over and consumers are not being advised to avoid eating any specific foods at this time. However, E. coli O157:H7 is still an important cause of human illness in the United States. More information about E. coli O157:H7, and steps people can take to reduce their risk of infection, can be found on the CDC E. coli O157:H7 Web Page and the CDC Vital Signs Web Page.

CDC collaborated with public health and agriculture officials in Missouri, other states, and the U.S. Food and Drug Administration (FDA) to investigate a multistate outbreak of Escherichia coli serotype O157:H7 infections linked to romaine lettuce. Public health investigators used DNA "fingerprints" of E. coli O157:H7 bacteria obtained through diagnostic testing with pulsed-field gel electrophoresis (PFGE) to identify cases of illness that may be part of this outbreak. They used data from PulseNet, the national subtyping network made up of state and local public health laboratories and federal food regulatory laboratories that performs molecular surveillance of foodborne infections.

As of March 21, 2012, 58 persons infected with the outbreak strain of E. coli O157:H7 were reported from 9 states. The number of ill persons identified in each state was as follows: Arizona (1), Arkansas (2), Illinois (9), Indiana (2), Kansas (2), Kentucky (1), Minnesota (2), Missouri (38), and Nebraska (1). Two cases were removed from the case count because advanced molecular testing determined that they were not related to this outbreak strain. Among persons for whom information was available, illnesses began from October 9, 2011 to November 7, 2011. Ill persons ranged in age from 1 to 94 years, with a median age of 28 years. Fifty-nine percent were female. Among the 49 ill persons with available information, 33 (67%) were hospitalized, and 3 developed hemolytic uremic syndrome (HUS). No deaths were reported.

The outbreak can be visually described with a chart showing the number of people who became ill each day. This chart is called an epidemic curve or epi curve. Please see the Timeline for Reporting of E. coli Cases for more details.

This particular outbreak appears to be over. However, E. coli O157:H7 is still an important cause of human illness in the United States. More information about E. coli O157:H7, and steps people can take to reduce their risk of infection, can be found on the CDC E. coli O157:H7 Web Page and the CDC Vital Signs Web Page.

Collaborative investigative efforts of state, local, and federal public health agencies indicated that romaine lettuce sold primarily at several locations of a single grocery store chain (Chain A) was the likely source of illnesses in this outbreak. Contamination likely occurred before the product reached grocery store Chain A locations.

During October 10 to November 4, 2011, public health officials in several states and CDC conducted an epidemiologic study by comparing foods eaten by 22 ill and 82 well persons, including 45 well persons who shopped at grocery store Chain A during the week of October 17, 2011. Analysis of this study indicated that eating romaine lettuce was associated with illness. Ill persons (85%) were significantly more likely than well persons (46%) to report eating romaine lettuce in the week before illness. Ill persons (86%) were also significantly more likely than well persons (55%) to report shopping at grocery store Chain A. Among ill and well persons who shopped at grocery store Chain A, ill persons (89%) were significantly more likely than well persons (9%) to report eating a salad from the salad bar at grocery store Chain A. Several different types of lettuce were offered on the salad bar at grocery store Chain A. Of 18 ill persons who reported the type of lettuce eaten, 94% reported eating romaine lettuce. No other type of lettuce or other item offered on the salad bar was reported to be eaten by more than 55% of ill persons.

Ill persons reported purchasing salads from salad bars at grocery store Chain A between October 5 and October 24, 2011. A total of 9 locations of grocery store Chain A were identified where more than one ill person reported purchasing a salad from the salad bar in the week before becoming ill. This included 2 separate locations where 4 ill persons reported purchasing a salad at each location. For locations where more than one ill person reported purchasing a salad from the salad bar and the date of purchase was known, dates of purchase were all within 4 days of other ill persons purchasing a salad at that same location. Chain A fully cooperated with the investigation and voluntarily removed suspected food items from the salad bar on October 26, 2011, out of an abundance of caution. Romaine lettuce served on salad bars at all locations of grocery store Chain A had come from a single lettuce processing facility via a single distributor. This indicates that contamination of romaine lettuce likely occurred before the product reached grocery store Chain A locations.

The FDA and several state agencies conducted traceback investigations for romaine lettuce to try to identify the source of contamination. Traceback investigations focused on ill persons who had eaten at salad bars at several locations of grocery store Chain A and ill persons at university campuses in Minnesota (1 ill person) and Missouri (2 ill persons). Traceback analysis determined that a single common lot of romaine lettuce harvested from Farm A was used to supply the grocery store Chain A locations as well as the university campus in Minnesota during the time of the illnesses. This lot was also provided to a distributor that supplied lettuce to the university campus in Missouri, but records were not sufficient to determine if this lot was sent to this university campus. Preliminary findings of investigation at Farm A did not identify the source of the contamination. Farm A was no longer in production during the time of the investigation.

Most people infected with E. coli O157:H7 develop diarrhea (often bloody) and abdominal cramps 2-8 days (3-4 days, on average) after swallowing the organism, but some illnesses last longer and are more severe. Infection is usually diagnosed by stool sample culture. While most people recover within a week, some develop a severe infection. A type of kidney failure called hemolytic uremic syndrome (HUS) can begin as the diarrhea is improving; this condition can occur among persons of any age but is most common in children under 5 years old and the elderly. Signs and symptoms of HUS may include fever, abdominal pain, pale skin tone, fatigue and irritability, small, unexplained bruises or bleeding from the nose and mouth, decreased urination, and swelling of the face, hands, feet, or entire body. Persons who experience these symptoms and believe they are at risk for HUS should seek emergency medical care immediately.

Since this particular outbreak appears to be over, consumers are not being advised to avoid eating any specific foods at this time. Consumers should always practice safe food handling and preparation measures.* At home, keep raw meat, poultry, and seafood separate from produce and ready-to-eat foods. Wash hands, utensils, and surfaces with hot, soapy water before and after handling food.

CDC leads federal efforts to gather data on foodborne illnesses, investigate foodborne illnesses and outbreaks, and monitor the effectiveness of prevention and control efforts. CDC is not a food safety regulatory agency but works closely with the food safety regulatory agencies, in particular, with the Food and Drug Administration of the U.S. Department of Health and Human Services and the Food Safety and Inspection Service of the U.S. Department of Agriculture. CDC also plays a key role in building state and local health department epidemiology, laboratory, and environmental health capacity to support foodborne disease surveillance and outbreak response. Notably, CDC data can be used to help document the effectiveness of regulatory interventions.

NOTICE: The information on this page is no longer being updated and may have changed. The information is accurate only as of the last page update.

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April 26, 2013 [Investigative Update]: Multistate Outbreak of Shiga toxin-producing Escherichia coli O121 Infections Linked to Farm Rich Brand Frozen Food Products

This particular outbreak appears to be over. However, E. coli is still an important cause of human illness in the United States. More information about E. coli, and steps people can take to reduce their risk of infection, can be found on the CDC E. coli Web Page.

CDC collaborated with public health officials in several states, the U.S. Department of Agriculture’s Food Safety and Inspection Service (USDA-FSIS), and the U.S. Food and Drug Administration (FDA) to investigate a multistate outbreak of Shiga toxin-producing Escherichia coli O121 (STEC O121) infections linked to Farm Rich brand frozen food products produced by Rich Products Corporation of Buffalo, New York.

Public health investigators used DNA "fingerprints" of E. coli bacteria obtained through diagnostic testing with pulsed-field gel electrophoresis (PFGE) to identify cases of illness that were part of this outbreak. They used data from PulseNet, the national subtyping network made up of state and local public health laboratories and federal food regulatory laboratories that performs molecular surveillance of foodborne infections.

A total of 35 individuals infected with the outbreak strain of STEC O121 were reported from 19 states. The number of ill persons identified in each state was as follows: Alabama (1), Arkansas (1), California (1), Colorado (1), Florida (2), Illinois (2), Indiana (2), Michigan (3), Missouri (1), Mississippi (1), New York (4), Ohio (6), Pennsylvania (1), South Dakota (1), Texas (3), Utah (1), Virginia (1), Washington (1), and Wisconsin (2).

Illness onset dates ranged from December 30, 2012 to April 15, 2013. Ill persons ranged in age from less than 1 year to 75 years, with a median age of 17 years. Eighty-two percent of ill persons were 21 years of age or younger. Sixty percent of ill persons were female. Among 29 persons for whom information was available, 9 (31%) were hospitalized. Two ill people developed hemolytic uremic syndrome (HUS), a type of kidney failure, and no deaths were reported.

This outbreak appears to be over. However, many of these products have a long shelf-life, and they may still be in peoples’ freezers. Consumers unaware of the recall could continue to eat these products and potentially get sick.

E. coli is an important cause of human illness in the United States. More information about E. coli and steps people can take to reduce their risk for infection can be found on the CDC E. coli homepage.

Epidemiologic, laboratory, and traceback investigations conducted by officials in local, state, and federal public health, agriculture, and regulatory agencies linked this outbreak to Farm Rich brand frozen food products.

State and federal public health officials interviewed ill persons to obtain information regarding foods they might have eaten and other exposures in the week before illness. Twenty-four (100%) of 24 ill persons interviewed reported consuming frozen food products. Thirteen (68%) of 19 ill persons reported consuming Farm Rich brand frozen food products.

The outbreak strain of STEC O121 was identified in two different Farm Rich brand frozen products collected from the homes of two ill persons in New York and Texas.

On April 4, 2013, Rich Products Corporation recalled all of its Farm Rich, Market Day, and Schwan’s brand frozen food products produced at its Waycross, Georgia plant between June 1, 2011 and March 29, 2013 due to possible contamination with E. coli O121.

USDA-FSIS and FDA investigated suppliers of the common ingredients in the various types of Farm Rich brand frozen products consumed by ill persons, but the source of contamination was not identified. Rich Products Corporation is not currently producing products at its Waycross, Georgia plant, while the company continues to work with USDA-FSIS to develop a plan to make food safety improvements.

A total of 35 individuals infected with the outbreak strain of STEC O121 were reported from 19 states. There were no new illnesses reported since the last update.

Illness onset dates ranged from December 30, 2012 to April 15, 2013. Ill persons ranged in age from less than 1 year to 75 years, with a median age of 17 years. Eighty-two percent of ill persons were 21 years of age or younger. Sixty percent of ill persons were female. Among 29 persons for whom information was available, 9 (31%) were hospitalized. Two ill people developed hemolytic uremic syndrome (HUS), a type of kidney failure, and no deaths were reported.

A total of 35 individuals infected with the outbreak strain of STEC O121 have been reported from 19 states. Three additional ill persons have been reported from Missouri (1) and Ohio (2).

Among persons for whom information is available, illness onset dates range from December 30, 2012 to April 15, 2013. Ill persons range in age from one year to 75 years, with a median age of 17 years. Eighty-two percent of ill persons are 21 years of age or younger. Sixty percent of ill persons are female. Among 29 persons with available information, 9 (31%) reported being hospitalized. Two ill people developed hemolytic uremic syndrome (HUS), a type of kidney failure, and no deaths have been reported.

Illnesses that occurred after April 10, 2013 might not be reported yet due to the time it takes between when a person becomes ill and when the illness is reported.

Twenty-four (100%) of 24 ill persons interviewed reported consuming frozen food products. Twelve (63%) of 19 ill persons reported consuming Farm Rich brand frozen food products. Investigations are ongoing to determine the specific types and sources of frozen food that might be linked with illness, as well as to determine which particular ingredients or components of these products may be contaminated.

A total of 32 individuals infected with the outbreak strain of STEC O121 have been reported from 18 states. Five additional ill persons have been reported from California (1), Colorado (1), Florida (2), and Ohio (1).

Among persons for whom information is available, illness onset dates range from December 30, 2012 to April 2, 2013. Ill persons range in age from one year to 75 years, with a median age of 17 years. Eighty-one percent of ill persons are 21 years of age or younger. Fifty-six percent of ill persons are female. Among 26 persons with available information, 9 (35%) reported being hospitalized. Two ill people developed hemolytic uremic syndrome (HUS), a type of kidney failure, and no deaths have been reported.

Illnesses that occurred after March 30, 2013 might not be reported yet due to the time it takes between when a person becomes ill and when the illness is reported.

A total of 27 individuals infected with the outbreak strain of STEC O121 have been reported from 15 states. Three new cases have been reported from Illinois (1), Michigan (1) and New York (1).

Among persons for whom information is available, illness onset dates range from December 30, 2012 to March 18, 2013. Ill persons range in age from 2 years to 75 years, with a median age of 17 years. Eighty-one percent of ill persons are 21 years of age or younger. Fifty-six percent of ill persons are female. Among 23 persons with available information, 8 (35%) reported being hospitalized. Two ill people developed hemolytic uremic syndrome (HUS), a type of kidney failure, and no deaths have been reported.

Illnesses that occurred after March 10, 2013 might not be reported yet due to the time it takes between when a person becomes ill and when the illness is reported.

Twenty (100%) of 20 ill persons interviewed reported consuming frozen food products. Ten (63%) of 16 ill persons reported consuming Farm Rich brand frozen food products. Investigations are ongoing to determine the specific types and sources of frozen food that might be linked with illness, as well as to determine which particular ingredients or components of these products may be contaminated.

Testing conducted by the Outbreaks Section of the USDA-FSIS Eastern Laboratory identified the outbreak strain of STEC O121 from individually wrapped Farm Rich brand frozen mini pizza slices from an opened package collected from an ill person’s home in Texas. The frozen mini pizza slices were included in the products that were recalled on March 28, 2013.

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CDC is collaborating with public health officials in many states, the U.S. Department of Agriculture’s Food Safety and Inspection Service (USDA-FSIS), and the U.S. Food and Drug Administration (FDA) to investigate a multistate outbreak of Shiga toxin-producing Escherichia coli O121 (STEC O121) infections. Public health investigators are using DNA "fingerprints" of E. coli bacteria obtained through diagnostic testing with pulsed-field gel electrophoresis, or PFGE, to identify cases of illness that could be part of this outbreak. They are using data from PulseNet, the national subtyping network made up of state and local public health laboratories and federal food regulatory laboratories that performs molecular surveillance of foodborne infections.

The type of bacteria responsible for this outbreak is among those referred to as Shiga toxin-producing E. coli or STEC. Some types of STEC frequently cause severe disease, including bloody diarrhea and hemolytic uremic syndrome (HUS), which is a type of kidney failure. STEC bacteria are divided into serogroups (e.g., O157 or O121). E. coli O157 is the STEC serogroup found most commonly in U.S. patients. Other E. coli serogroups in the STEC group, including O121, are sometimes called "non-O157 STECs." Because clinical laboratories typically cannot directly identify non-O157 STEC serogroups, they must first test stool samples for the presence of Shiga toxins.  Then, the positive samples must be sent to public health laboratories to look for non-O157 STEC. In recent years, the number of clinical laboratories that test for Shiga toxin has increased greatly, but some laboratories still do not perform these tests. Because of these complexities, many non-O157 STEC infections are probably not identified. The STEC O121 PFGE pattern in this outbreak is rare. In the past it has been seen less than 30 times in PulseNet.

A total of 24 individuals infected with the outbreak strain of STEC O121 have been reported from 15 states. The number of ill persons identified in each state is as follows: Alabama (1), Arkansas (1), Illinois (1), Indiana (2), Michigan (2), Mississippi (1), New York (3), Ohio (3), Pennsylvania (1), South Dakota (1), Texas (3), Utah (1), Virginia (1), Washington (1), and Wisconsin (2).

Among persons for whom information is available, illness onset dates range from December 30, 2012 to March 9, 2013. Ill persons range in age from 2 years to 75 years, with a median age of 17 years. Seventy-eight percent of ill persons are 21 years of age or younger. Sixty-three percent of ill persons are female. Among 21 persons with available information, 7 (33%) reported being hospitalized. One ill person developed HUS, and no deaths have been reported.

The outbreak can be visually described with a chart showing the number of people who became ill each day or week. This chart is called an epi curve. Illnesses that occurred after March 1, 2013 might not be reported yet due to the time it takes between when a person becomes ill and when the illness is reported. This takes an average of 2 to 3 weeks. For more details, please see Timeline for Reporting E. coli Cases.

Epidemiologic, laboratory, and traceback investigations conducted by officials in local, state, and federal public health, agriculture, and regulatory agencies indicate that Farm Rich brand frozen food products are one likely source of this outbreak of STEC O121 infections.

In interviews, ill persons answered questions about food consumed and other exposures during the week before becoming ill. Eighteen (100%) of 18 ill persons interviewed reported consuming frozen food products. Eight (57%) of 14 ill persons reported consuming Farm Rich brand frozen food products. Investigations are ongoing to determine the specific types and sources of frozen food that might be linked with illness, as well as to determine which particular ingredients or components of these products may be contaminated.

The New York State Department of Health, Wadsworth Center Laboratory, identified the outbreak strain of E. coli O121 in an opened package of Farm Rich brand frozen mini chicken and cheese quesadillas from an ill person’s home.

CDC and state and local public health partners are continuing laboratory surveillance through PulseNet to identify additional ill persons and to interview ill persons about foods eaten before becoming ill. FSIS and FDA are continuing to work closely with CDC and state partners during this investigation.

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December 7, 2011 [Announcement]: Multistate Outbreak of E. coli O157:H7 Infections Linked to Romaine Lettuce

December 7, 2011

As of November 30, 2011, 60 persons infected with the outbreak strain of E. coli serotype O157:H7 have been reported from 10 states.Collaborative investigative efforts of state, local, and federal public health and regulatory agencies indicate that romaine lettuce is the likely source of illnesses in this outbreak, and contamination likely occurred before the product reached retail stores.This particular outbreak appears to be over and consumers are not being advised to avoid eating any specific foods at this time. However, E. coli O157:H7 is still an important cause of human illness in the United States. More information about E. coli O157:H7, and steps people can take to reduce their risk of infection, can be found on the CDC E. coli O157:H7 Web Page and the CDC Vital Signs Web Page.

CDC is collaborating with public health and agriculture officials in Missouri, other states, and the U.S. Food and Drug Administration (FDA) to investigate a multistate outbreak of Escherichia coli serotype O157:H7 infections linked to romaine lettuce. Public health investigators are using DNA "fingerprints" of E. coli O157:H7 bacteria obtained through diagnostic testing with pulsed-field gel electrophoresis (PFGE) to identify cases of illness that may be part of this outbreak. They are using data from PulseNet, the national subtyping network made up of state and local public health laboratories and federal food regulatory laboratories that performs molecular surveillance of foodborne infections.

As of December 4, 2011, 60 persons infected with the outbreak strain of E. coli O157:H7 have been reported from10 states. The number of ill persons identified in each state is as follows: Arizona (1), Arkansas (2), Georgia (1), Illinois (9), Indiana (2), Kansas (3), Kentucky (1), Minnesota (3), Missouri (37), and Nebraska (1).

Among persons for whom information is available, illnesses began from October 10, 2011 to November 4, 2011. Ill persons ranged in age from 1 to 94 years, with a median age of 29 years old. Sixty-three percent were female. Among the 45 ill persons with available information, 30 (67%) were hospitalized, and 2 developed hemolytic uremic syndrome (HUS). No deaths have been reported.

The outbreak can be visually described with a chart showing the number of people who became ill each day. This chart is called an epidemic curve or epi curve. Illnesses that occurred after November 22, 2011, might not be reported yet due to the time it takes between when a person becomes ill and when the illness is reported. This takes an average of 2 to 3 weeks. Please see the Timeline for Reporting of E. coli Cases for more details.

This particular outbreak appears to be over. However, E. coli O157:H7 is still an important cause of human illness in the United States. More information about E. coli O157:H7, and steps people can take to reduce their risk of infection, can be found on the CDC E. coli O157:H7 Web Page and the CDC Vital Signs Web Page.

Collaborative investigative efforts of state, local, and federal public health agencies indicate that romaine lettuce sold primarily at several locations of a single grocery store chain (Chain A) was the likely source of illnesses in this outbreak. Contamination likely occurred before the product reached grocery store Chain A locations.

During October 10 to November 4, 2011, public health officials in several states and CDC conducted an epidemiologic study by comparing foods eaten by 22 ill and 82 well persons, including 45 well persons who shopped at grocery store Chain A during the week of October 17, 2011. Analysis of this study indicates that eating romaine lettuce was associated with illness. Ill persons (85%) were significantly more likely than well persons (46%) to report eating romaine lettuce in the week before illness. Ill persons (86%) were also significantly more likely than well persons (55%) to report shopping at grocery store Chain A. Among ill and well persons who shopped at grocery store Chain A, ill persons (89%) were significantly more likely than well persons (9%) to report eating a salad from the salad bar at grocery store Chain A. Several different types of lettuce were offered on the salad bar at grocery store Chain A. Of 18 ill persons who reported the type of lettuce eaten, 94% reported eating romaine lettuce. No other type of lettuce or other item offered on the salad bar was reported to be eaten by more than 55% of ill persons.

Ill persons reported purchasing salads from salad bars at grocery store Chain A between October 5 and October 24, 2011. A total of 9 locations of grocery store Chain A were identified where more than one ill person reported purchasing a salad from the salad bar in the week before becoming ill. This included 2 separate locations where 4 ill persons reported purchasing a salad at each location. For locations where more than one ill person reported purchasing a salad from the salad bar and the date of purchase was known, dates of purchase were all within 4 days of other ill persons purchasing a salad at that same location. Chain A fully cooperated with the investigation and voluntarily removed suspected food items from the salad bar on October 26, 2011, out of an abundance of caution. Romaine lettuce served on salad bars at all locations of grocery store Chain A had come from a single lettuce processing facility via a single distributor. This indicates that contamination of romaine lettuce likely occurred before the product reached grocery store Chain A locations.

The FDA and several state agencies conducted traceback investigations for romaine lettuce to try to identify the source of contamination. Traceback investigations focused on ill persons who had eaten at salad bars at several locations of grocery store Chain A and ill persons at university campuses in Minnesota (1 ill person) and Missouri (2 ill persons). Traceback analysis determined that a single common lot of romaine lettuce harvested from Farm A was used to supply the grocery store Chain A locations as well as the university campus in Minnesota during the time of the illnesses. This lot was also provided to a distributor that supplied lettuce to the university campus in Missouri, but records were not sufficient to determine if this lot was sent to this university campus. Preliminary findings of investigation at Farm A did not identify the source of the contamination. Farm A was no longer in production during the time of the investigation.

Most people infected with E. coli O157:H7 develop diarrhea (often bloody) and abdominal cramps 2-8 days (3-4 days, on average) after swallowing the organism, but some illnesses last longer and are more severe. Infection is usually diagnosed by stool sample culture. While most people recover within a week, some develop a severe infection. A type of kidney failure called hemolytic uremic syndrome (HUS) can begin as the diarrhea is improving; this condition can occur among persons of any age but is most common in children under 5 years old and the elderly. Signs and symptoms of HUS may include fever, abdominal pain, pale skin tone, fatigue and irritability, small, unexplained bruises or bleeding from the nose and mouth, decreased urination, and swelling of the face, hands, feet, or entire body. Persons who experience these symptoms and believe they are at risk for HUS should seek emergency medical care immediately.

Since this particular outbreak appears to be over, consumers are not being advised to avoid eating any specific foods at this time. Consumers should always practice safe food handling and preparation measures.* At home, keep raw meat, poultry, and seafood separate from produce and ready-to-eat foods. Wash hands, utensils, and surfaces with hot, soapy water before and after handling food.

CDC leads federal efforts to gather data on foodborne illnesses, investigate foodborne illnesses and outbreaks, and monitor the effectiveness of prevention and control efforts. CDC is not a food safety regulatory agency but works closely with the food safety regulatory agencies, in particular, with the Food and Drug Administration of the U.S. Department of Health and Human Services and the Food Safety and Inspection Service of the U.S. Department of Agriculture. CDC also plays a key role in building state and local health department epidemiology, laboratory, and environmental health capacity to support foodborne disease surveillance and outbreak response. Notably, CDC data can be used to help document the effectiveness of regulatory interventions.

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May 10, 2013 [Investigative Update]: Multistate Outbreak of Shiga toxin-producing Escherichia coli O121 Infections Linked to Farm Rich Brand Frozen Food Products

This particular outbreak appears to be over. However, E. coli is still an important cause of human illness in the United States. More information about E. coli, and steps people can take to reduce their risk of infection, can be found on the CDC E. coli Web Page.

CDC collaborated with public health officials in several states, the U.S. Department of Agriculture’s Food Safety and Inspection Service (USDA-FSIS), and the U.S. Food and Drug Administration (FDA) to investigate a multistate outbreak of Shiga toxin-producing Escherichia coli O121 (STEC O121) infections linked to Farm Rich brand frozen food products produced by Rich Products Corporation of Buffalo, New York.

Public health investigators used DNA "fingerprints" of E. coli bacteria obtained through diagnostic testing with pulsed-field gel electrophoresis (PFGE) to identify cases of illness that were part of this outbreak. They used data from PulseNet, the national subtyping network made up of state and local public health laboratories and federal food regulatory laboratories that performs molecular surveillance of foodborne infections.

A total of 35 individuals infected with the outbreak strain of STEC O121 were reported from 19 states. The number of ill persons identified in each state was as follows: Alabama (1), Arkansas (1), California (1), Colorado (1), Florida (2), Illinois (2), Indiana (2), Michigan (3), Missouri (1), Mississippi (1), New York (4), Ohio (6), Pennsylvania (1), South Dakota (1), Texas (3), Utah (1), Virginia (1), Washington (1), and Wisconsin (2).

Illness onset dates ranged from December 30, 2012 to April 15, 2013. Ill persons ranged in age from less than 1 year to 75 years, with a median age of 17 years. Eighty-two percent of ill persons were 21 years of age or younger. Sixty percent of ill persons were female. Among 29 persons for whom information was available, 9 (31%) were hospitalized. Two ill people developed hemolytic uremic syndrome (HUS), a type of kidney failure, and no deaths were reported.

This outbreak appears to be over. However, many of these products have a long shelf-life, and they may still be in peoples’ freezers. Consumers unaware of the recall could continue to eat these products and potentially get sick.

E. coli is an important cause of human illness in the United States. More information about E. coli and steps people can take to reduce their risk for infection can be found on the CDC E. coli homepage.

Epidemiologic, laboratory, and traceback investigations conducted by officials in local, state, and federal public health, agriculture, and regulatory agencies linked this outbreak to Farm Rich brand frozen food products.

State and federal public health officials interviewed ill persons to obtain information regarding foods they might have eaten and other exposures in the week before illness. Twenty-four (100%) of 24 ill persons interviewed reported consuming frozen food products. Thirteen (68%) of 19 ill persons reported consuming Farm Rich brand frozen food products.

The outbreak strain of STEC O121 was identified in two different Farm Rich brand frozen products collected from the homes of two ill persons in New York and Texas.

On April 4, 2013, Rich Products Corporation recalled all of its Farm Rich, Market Day, and Schwan’s brand frozen food products produced at its Waycross, Georgia plant between June 1, 2011 and March 29, 2013 due to possible contamination with E. coli O121.

USDA-FSIS and FDA investigated suppliers of the common ingredients in the various types of Farm Rich brand frozen products consumed by ill persons, but the source of contamination was not identified. Rich Products Corporation is not currently producing products at its Waycross, Georgia plant, while the company continues to work with USDA-FSIS to develop a plan to make food safety improvements.

A total of 35 individuals infected with the outbreak strain of STEC O121 were reported from 19 states. There were no new illnesses reported since the last update.

Illness onset dates ranged from December 30, 2012 to April 15, 2013. Ill persons ranged in age from less than 1 year to 75 years, with a median age of 17 years. Eighty-two percent of ill persons were 21 years of age or younger. Sixty percent of ill persons were female. Among 29 persons for whom information was available, 9 (31%) were hospitalized. Two ill people developed hemolytic uremic syndrome (HUS), a type of kidney failure, and no deaths were reported.

A total of 35 individuals infected with the outbreak strain of STEC O121 have been reported from 19 states. Three additional ill persons have been reported from Missouri (1) and Ohio (2).

Among persons for whom information is available, illness onset dates range from December 30, 2012 to April 15, 2013. Ill persons range in age from one year to 75 years, with a median age of 17 years. Eighty-two percent of ill persons are 21 years of age or younger. Sixty percent of ill persons are female. Among 29 persons with available information, 9 (31%) reported being hospitalized. Two ill people developed hemolytic uremic syndrome (HUS), a type of kidney failure, and no deaths have been reported.

Illnesses that occurred after April 10, 2013 might not be reported yet due to the time it takes between when a person becomes ill and when the illness is reported.

Twenty-four (100%) of 24 ill persons interviewed reported consuming frozen food products. Twelve (63%) of 19 ill persons reported consuming Farm Rich brand frozen food products. Investigations are ongoing to determine the specific types and sources of frozen food that might be linked with illness, as well as to determine which particular ingredients or components of these products may be contaminated.

A total of 32 individuals infected with the outbreak strain of STEC O121 have been reported from 18 states. Five additional ill persons have been reported from California (1), Colorado (1), Florida (2), and Ohio (1).

Among persons for whom information is available, illness onset dates range from December 30, 2012 to April 2, 2013. Ill persons range in age from one year to 75 years, with a median age of 17 years. Eighty-one percent of ill persons are 21 years of age or younger. Fifty-six percent of ill persons are female. Among 26 persons with available information, 9 (35%) reported being hospitalized. Two ill people developed hemolytic uremic syndrome (HUS), a type of kidney failure, and no deaths have been reported.

Illnesses that occurred after March 30, 2013 might not be reported yet due to the time it takes between when a person becomes ill and when the illness is reported.

A total of 27 individuals infected with the outbreak strain of STEC O121 have been reported from 15 states. Three new cases have been reported from Illinois (1), Michigan (1) and New York (1).

Among persons for whom information is available, illness onset dates range from December 30, 2012 to March 18, 2013. Ill persons range in age from 2 years to 75 years, with a median age of 17 years. Eighty-one percent of ill persons are 21 years of age or younger. Fifty-six percent of ill persons are female. Among 23 persons with available information, 8 (35%) reported being hospitalized. Two ill people developed hemolytic uremic syndrome (HUS), a type of kidney failure, and no deaths have been reported.

Illnesses that occurred after March 10, 2013 might not be reported yet due to the time it takes between when a person becomes ill and when the illness is reported.

Twenty (100%) of 20 ill persons interviewed reported consuming frozen food products. Ten (63%) of 16 ill persons reported consuming Farm Rich brand frozen food products. Investigations are ongoing to determine the specific types and sources of frozen food that might be linked with illness, as well as to determine which particular ingredients or components of these products may be contaminated.

Testing conducted by the Outbreaks Section of the USDA-FSIS Eastern Laboratory identified the outbreak strain of STEC O121 from individually wrapped Farm Rich brand frozen mini pizza slices from an opened package collected from an ill person’s home in Texas. The frozen mini pizza slices were included in the products that were recalled on March 28, 2013.

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CDC is collaborating with public health officials in many states, the U.S. Department of Agriculture’s Food Safety and Inspection Service (USDA-FSIS), and the U.S. Food and Drug Administration (FDA) to investigate a multistate outbreak of Shiga toxin-producing Escherichia coli O121 (STEC O121) infections. Public health investigators are using DNA "fingerprints" of E. coli bacteria obtained through diagnostic testing with pulsed-field gel electrophoresis, or PFGE, to identify cases of illness that could be part of this outbreak. They are using data from PulseNet, the national subtyping network made up of state and local public health laboratories and federal food regulatory laboratories that performs molecular surveillance of foodborne infections.

The type of bacteria responsible for this outbreak is among those referred to as Shiga toxin-producing E. coli or STEC. Some types of STEC frequently cause severe disease, including bloody diarrhea and hemolytic uremic syndrome (HUS), which is a type of kidney failure. STEC bacteria are divided into serogroups (e.g., O157 or O121). E. coli O157 is the STEC serogroup found most commonly in U.S. patients. Other E. coli serogroups in the STEC group, including O121, are sometimes called "non-O157 STECs." Because clinical laboratories typically cannot directly identify non-O157 STEC serogroups, they must first test stool samples for the presence of Shiga toxins.  Then, the positive samples must be sent to public health laboratories to look for non-O157 STEC. In recent years, the number of clinical laboratories that test for Shiga toxin has increased greatly, but some laboratories still do not perform these tests. Because of these complexities, many non-O157 STEC infections are probably not identified. The STEC O121 PFGE pattern in this outbreak is rare. In the past it has been seen less than 30 times in PulseNet.

A total of 24 individuals infected with the outbreak strain of STEC O121 have been reported from 15 states. The number of ill persons identified in each state is as follows: Alabama (1), Arkansas (1), Illinois (1), Indiana (2), Michigan (2), Mississippi (1), New York (3), Ohio (3), Pennsylvania (1), South Dakota (1), Texas (3), Utah (1), Virginia (1), Washington (1), and Wisconsin (2).

Among persons for whom information is available, illness onset dates range from December 30, 2012 to March 9, 2013. Ill persons range in age from 2 years to 75 years, with a median age of 17 years. Seventy-eight percent of ill persons are 21 years of age or younger. Sixty-three percent of ill persons are female. Among 21 persons with available information, 7 (33%) reported being hospitalized. One ill person developed HUS, and no deaths have been reported.

The outbreak can be visually described with a chart showing the number of people who became ill each day or week. This chart is called an epi curve. Illnesses that occurred after March 1, 2013 might not be reported yet due to the time it takes between when a person becomes ill and when the illness is reported. This takes an average of 2 to 3 weeks. For more details, please see Timeline for Reporting E. coli Cases.

Epidemiologic, laboratory, and traceback investigations conducted by officials in local, state, and federal public health, agriculture, and regulatory agencies indicate that Farm Rich brand frozen food products are one likely source of this outbreak of STEC O121 infections.

In interviews, ill persons answered questions about food consumed and other exposures during the week before becoming ill. Eighteen (100%) of 18 ill persons interviewed reported consuming frozen food products. Eight (57%) of 14 ill persons reported consuming Farm Rich brand frozen food products. Investigations are ongoing to determine the specific types and sources of frozen food that might be linked with illness, as well as to determine which particular ingredients or components of these products may be contaminated.

The New York State Department of Health, Wadsworth Center Laboratory, identified the outbreak strain of E. coli O121 in an opened package of Farm Rich brand frozen mini chicken and cheese quesadillas from an ill person’s home.

CDC and state and local public health partners are continuing laboratory surveillance through PulseNet to identify additional ill persons and to interview ill persons about foods eaten before becoming ill. FSIS and FDA are continuing to work closely with CDC and state partners during this investigation.

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April 3, 2012 [FINAL Update]: Multistate Outbreak of E. coli O26 Infections Linked to Raw Clover Sprouts at Jimmy John's Restaurants.

This particular outbreak appears to be over. However, E. coli is still an important cause of human illness in the United States. More information about E. coli, and steps people can take to reduce their risk of infection, can be found on the CDC E. coli Web Page.

A total of 29 individuals infected with the outbreak strain of E. coli O26 have been reported from 11 states. The 4 new cases have been reported from Michigan, Pennsylvania, Washington, and West Virginia. Of the 27 ill persons with available information, 23 (85%) reported consuming sprouts at Jimmy John's restaurants in the 7 days preceding illness.

Among 29 ill persons, illness onset dates ranged from December 25, 2011 to March 3, 2012. Ill persons range in age from 9 years to 57 years old, with a median age of 26 years. Eighty-nine percent of ill persons are female. Among the 29 ill persons, 7 (24%) were hospitalized. None have developed HUS, and no deaths have been reported.

A total of 25 individuals infected with the outbreak strain of E. coli O26 have been reported from 8 states. The 11 new ill persons have been reported from Alabama, Michigan, and Ohio. Of the 24 ill persons with available information, 21 (87%) reported consuming sprouts at Jimmy John's restaurants in the 7 days preceding illness.

Among these 24 ill persons, illness onset dates ranged from December 25, 2011 to February 15, 2012. Ill persons range in age from 9 years to 53 years old, with a median age of 26 years. Eighty-eight percent of ill persons are female. Among the 24 ill persons, 6 (25%) were hospitalized. None have developed HUS, and no deaths have been reported. Illnesses that occurred after February 19, 2012, might not be reported yet due to the time it takes between when a person becomes ill and when the illness is reported.

A total of 14 individuals infected with the outbreak strain of E. coli O26 have been reported from 6 states. The two new cases have been reported from Michigan. Both new cases reported eating at Jimmy John's restaurants and consuming sprouts in the 7 days preceding illness.

Among the 14 persons for whom information is available, illnesses onset dates range from December 25, 2011 to February 7, 2012. Ill persons range in age from 9 years to 49 years old, with a median age of 25 years old. One hundred percent of ill persons are female. Among the 14 ill persons, 2 (14%) were hospitalized. None have developed HUS, and no deaths have been reported. Illnesses that occurred after February 4, 2012, might not be reported yet due to the time it takes between when a person becomes ill and when the illness is reported.

CDC is collaborating with public health officials in multiple states and the U.S. Food and Drug Administration (FDA) to investigate a multistate outbreak of Shiga toxin-producing Escherichia coli serogroup O26 (STEC O26) infections... (show more »)

CDC is collaborating with public health officials in multiple states and the U.S. Food and Drug Administration (FDA) to investigate a multistate outbreak of Shiga toxin-producing Escherichia coli serogroup O26 (STEC O26) infections likely linked with eating raw clover sprouts. Public health investigators are using DNA "fingerprints" of E. coli bacteria obtained through diagnostic testing with pulsed-field gel electrophoresis, or PFGE, to identify cases of illness that may be part of this outbreak. They are using data from PulseNet, the national subtyping network made up of state and local public health laboratories and federal food regulatory laboratories that performs molecular surveillance of foodborne infections.

The type of bacteria responsible for this outbreak are referred to as STEC. STEC bacteria are grouped by serogroups (e.g., O157 or O26). The STEC serogroup found most commonly in U.S. patients is E. coli O157. Other E. coli serogroups in the STEC group, including O26, are sometimes called "non-O157 STECs." Some types of STEC frequently cause severe disease, including bloody diarrhea and hemolytic uremic syndrome (HUS). Others, such as common strains of STEC O26, typically cause milder illness. Currently, there are limited public health surveillance data on the occurrence of non-O157 STECs, including STEC O26; therefore, STEC O26 infections may go undiagnosed or unreported. Because non-O157 STEC infections are more difficult to identify than STEC O157, many clinical laboratories do not test for them. The STEC O26 PFGE pattern in this outbreak has rarely been seen before in PulseNet.

A total of 12 persons infected with the outbreak strain of STEC O26 have been reported from 5 states. The number of ill persons identified in each state is as follows: Iowa (5), Missouri (3), Kansas (2), Arkansas (1), and Wisconsin (1). Among persons for whom information is available, illness onset dates range from December 25, 2011 to January 15, 2012. Ill persons range in age from 9 years to 49 years old, with a median age of 25 years old. One hundred percent of ill persons are female. Among the 12 ill persons, 2 (17%) were hospitalized. None have developed HUS, and no deaths have been reported.

The outbreak can be visually described with a chart showing the number of people who became ill each day. This chart is called an epi curve. Illnesses that occurred after January 27, 2012, might not be reported yet due to the time it takes between when a person becomes ill and when the illness is reported. This takes an average of 2 to 3 weeks. All epi curves for this investigation are available on the epi curve page. Please see the E. coli Outbreak Investigations: Timeline for Reporting Cases for more details. Top of Page

Epidemiologic and traceback investigations conducted by officials in local, state, and federal public health, agriculture, and regulatory agencies have linked this outbreak to eating raw clover sprouts. Among the 11 ill persons with information available, 10 (91%) reported eating at a Jimmy John's sandwich restaurant in the 7 days preceding illness. Ill persons reported eating at 9 different locations of Jimmy John's restaurants in 4 states in the week before becoming ill. One location was identified where more than one ill person reported eating in the week before becoming ill. Among the 10 ill persons who reported eating at a Jimmy John's restaurant location, 8 (80%) reported eating a sandwich containing sprouts, and 9 (90%) reported eating a sandwich containing lettuce. Currently, no other common grocery stores or restaurants are associated with illnesses.

FDA's traceback investigation is ongoing. Preliminary traceback information has identified a common lot of clover seeds used to grow clover sprouts served at Jimmy John's restaurant locations where ill persons ate. FDA and states conducted a traceback that identified two separate sprouting facilities; both used the same lot of seed to grow clover sprouts served at these Jimmy John's restaurant locations. On February 10, 2012, the seed supplier initiated notification of sprouting facilities that received this lot of clover seed to stop using it. Investigations are ongoing to identify other locations that may have sold clover sprouts grown from this seed lot.

This investigation is ongoing, but preliminary results of the epidemiologic and traceback investigations indicate eating raw clover sprouts at Jimmy John's restaurants is the likely cause of this outbreak. CDC and state and local public health partners are continuing laboratory surveillance through PulseNet to identify additional ill persons and to interview ill persons about foods eaten before becoming ill. FDA is continuing to work closely with CDC and state partners during this investigation. CDC will update the public on the progress of this investigation as information becomes available.

Based on previous outbreaks associated with sprouts, investigation findings have demonstrated that sprout seeds might become contaminated in several ways. They could be grown with contaminated water or improperly composted manure fertilizer. They could be contaminated with feces from domestic or wild animals, or with runoff from animal production facilities, or by improperly cleaned growing or processing equipment. Seeds also might become contaminated during harvesting, distribution, or storage. Many clover seeds are produced for agricultural use, so they might not be processed, handled, and stored as human food would. Conditions suitable for sprouting the seed also permit bacteria that might be present on seeds to grow and multiply rapidly.

In 1999, FDA released guidance to help seed producers and sprout growers enhance the safety of their products. Specific measures recommended in the guidelines include a seed disinfection step and microbiologic tests of water that has been used to grow each lot of sprouts. The microbiologic tests currently recommended under this guidance would not identify the presence of STEC O26.

Preliminary results indicate that this strain of E. coli produces Shiga toxin type 1 and does not produce Shiga toxin type 2. (« show less)

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