Stec

  • Posted: February 8th, 2012 - 10:58pm by Doug Powell

    The U.S. Food Safety and Inspection Service announced on Feb. 8 it is extending the implementation date for routine sampling of six additional shiga-toxin producing E. coli serogroups (O26, O45, O103, O111, O121 and O145) for 90 days, according to the North American Meat Processors Association. The date was extended from March 5 to June 4.

    NAMP says the extension was granted to give extra time to establishments so they could validate their test methods and detect these pathogens prior to entering the commerce stream.

    Initially, FSIS plans to sample raw beef manufacturing trimmings and other raw ground beef product components both imported and produced domestically, plus test the serogroups’ samples.

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  • Posted: January 23rd, 2012 - 11:19am by Ben Chapman

    Author: 
    Ben Chapman

    In January 1993 I was in 10th grade. I had just discovered the Violent Femmes and punk rock; was worried about figuring out calculus (I eventually did); and spent most of my time being uncool and longing to be cool. Probably pretty similar to every other awkward teenager. I didn't have a clue that a tragic foodborne illness outbreak was unfolding in the Pacific Northwest and that the event would eventually define a bunch of what I focus on every day.

    I had never even heard of Jack-in-the-Box.

    The outbreak was linked to four deaths, over to 700 illnesses and almost 200 hospitalizations. E. coli O157:H7 contaminated hamburger was then undercooked and served to thousands from 73 Jack-in-the-Box restaurants. Jack-in-the-Box will forever be linked to this event - and over the past 18 years has become a prominent force in food safety risk reduction.

    News of this outbreak hit on President Clinton's inauguration day and as Doug has written,

    Those two events, more than any other, dramatically changed the public discussion of food safety in the U.S. The Jack-in-the-Box outbreak had all the elements of a dramatic story: children were involved; the risk was relatively unknown and unfamiliar; and a sense of outrage developed in response to the inadequacy of the government inspection system. The newly inaugurated President Clinton made microbial food safety a Presidential issue.

    And the first focus went to E. coli O157:H7 - the serogroup linked to the Jack-in-the-Box illnesses. Food microbiologists and epidemiologists have seen lots of other equally dangerous shigatoxin-producing serogroups (shigatoxin is what makes E. coli O157:H7, along with its ability to stick to cells so devastating). Here's a list of the non-O157 STEC outbreaks we've been able to find going back to the mid-1990s.

    Later this afternoon I will be on my way to Lincoln, NE to meet with a group of academics, researchers, extension folks and regulators to talk about a large 5-year integrated project focused on reducing STECs from farm-to-fork that USDA NIFA has funded. Through the wonders of the Internet, Doug will be Skyping in.

    LINCOLN, Neb. -- The U.S. Department of Agriculture (USDA) announced today that it has awarded a research grant to the University of Nebraska-Lincoln (UNL) to help reduce the occurrence and public health risks from Shiga toxin-producing E. coli (STEC) along the entire beef production pathway. Dr. Chavonda Jacobs-Young, acting director of USDA's National Institute of Food and Agriculture (NIFA), is scheduled to award the $25 million grant to the UNL-lead research team today at the university in Lincoln.

    "Shiga toxin-producing E. coli are a serious threat to our food supply and public health, causing more than 265,000 infections each year," said Chavonda Jacobs-Young, acting NIFA director. "As non-O157 STEC bacteria have emerged and evolved, so too must our regulatory policies to protect the public health and ensure the safety of our food supply. This research will help us to understand how these pathogens travel throughout the beef production process and how outbreaks occur, enabling us to find ways to prevent illness and improve the safety of our nation's food supply."

    Dr. James Keen at UNL, along with a multi-institutional and multi-disciplinary team of researchers, educators and extension specialists, will use the $25 million grant to improve risk management and assessment of eight strains of STEC in beef. This work will include the O104 strain that caused the recent outbreak in Germany. The project will focus on identifying hazards and assessing exposures that lead to STEC infections in cattle and on developing strategies to detect, characterize and control these pathogens along the beef chain. This knowledge will then be used to find practical and effective STEC risk mitigation strategies. The five main objectives of the project include:

    Detection: develop and implement rapid detection technologies for pre-harvest, post-harvest and consumer environments.

    Biology: characterize the biological and epidemiological factors that drive outbreaks of STEC in pre-harvest, post-harvest, retail and consumer settings.

    Interventions: develop effective and economical interventions to lessen STEC risk from cattle, hides, carcasses, and ground and non-intact beef and compare the feasibility of implementing these interventions for large, small and very small beef producers.

    Risk analysis and assessment: develop a risk assessment model for STEC from live cattle to consumption to evaluate mitigation strategies and their expected public health impacts.

    Risk management and communication: translate research findings into user-friendly food-safety deliverables for stakeholders, food safety professionals, regulators, educators and consumers.

    For more check out the full PR here.
     

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  • Posted: December 23rd, 2011 - 10:49pm by Ben Chapman

    Author: 
    Ben Chapman

    Jack made it through his first child care season without much disease excitement --  just a little bit of pink eye and a couple of runny noses.  Child care facilities are notorious illness-spreading sites; children and care providers pass around pathogens like rotavirus, norovirus, Shigella and E. coli. As hand hygiene usually isn't the best in these facilities, outbreaks are often started by or extended by ill people (staff included) showing up while shedding. Cohorting (separating the already sick from the healthy) can be an effective way to limit spread.

    Except sick kids aren't always kept home and staff don't always stay away.

    In an early-release article in Pediatric Infectious Disease, investigators of an outbreak of E. coli O26:H11 linked to a Colorado child care center say that it could have been worse had health authorities hadn't pushed for cohorting. Part of the strategy was to test every staff member and child for STEC - those who were carrying the bug were separated from those who weren't. Sixty percent of the kids and staff at the center were carrying the outbreak strain (41 ill - 4 asymptomatically) and health authorities aggressively kept sick folks away until they stopped shedding.

    Some gems for child care providers from the abstract:

    - The median duration of shedding among symptomatic confirmed cases was 30.5 days.

    - The risk of being a case as in children <36 months was twice the risk among children 36-47 months.

    - Nearly half (49%) of the household contacts of confirmed cases developed a diarrheal illness.

    Outbreak of Shiga toxin-producing Escherichia coli serotype O26: H11 infection at a child care center in Colorado
    20.dec.11
    Pediatric Infectious Disease Journal
    Brown, Jennifer A. DVM, MPH; Hite, Donna S. BS; Gillim-Ross, Laura A. PHD; Maguire, Hugh F. PHD; Bennett, Janine K. MS; Patterson, Julia J. BA; Comstock, Nicole A. MSPH; Watkins, Anita K. MPH; Ghosh, Tista S. MD, MPH; Vogt, Richard L. MD
    Background: Shiga toxin-producing Escherichia coli (STEC) O26:H11 is an emerging cause of disease with serious potential consequences in children. The epidemiology and clinical spectrum of O26:H11 are incompletely understood. We investigated an outbreak of O26:H11 infection among children younger than 48 months of age and employees at a child care center.
    Methods: Every employee at the center (n=20) and every child <48 months (n=55) were tested for STEC and administered a questionnaire. Thirty environmental health inspections and site visits were conducted. A cohorting strategy for disease control was implemented.
    Results: Eighteen confirmed and 27 suspect cases were detected. There were no hospitalizations. The illness rate was 60% for children and for employees. The risk of being a case as in children <36 months was twice the risk among children 36-47 months (risk ratio: 2.10; 95% confidence interval: 1.00, 4.42). The median duration of shedding among symptomatic confirmed cases was 30.5 days (range: 14-52 days). Four (22%) confirmed cases were asymptomatic and 3 (17%) shed intermittently. Nearly half (49%) of the household contacts of confirmed cases developed a diarrheal illness. The outbreak was propagated by person-to-person transmission; cohorting was an effective disease control strategy.
    Conclusions: This was the largest reported outbreak of O26:H11 infection in the United States and the largest reported non-O157 STEC outbreak in a U.S. child care center. Non-O157 STEC infection is a differential diagnosis for outbreaks of diarrhea in child care settings. Aggressive disease control measures were effective, but should be evaluated for outbreaks in other settings.

     

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  • Posted: December 9th, 2011 - 4:12am by Doug Powell

     To all broken hearts: don't eat prepackaged cookie dough before it's baked.

    That’s the message health-types conclude from a June 2009 outbreak of shiga-toxin producing E. coli (primarily O157:H7) in Nestle Toll House cookie dough that sickened at least 77 people in 30 states. Thirty-five people were hospitalized – from cookie dough.

    The 2009 investigation, which involved extensive traceback, laboratory, and environmental analysis, led to a recall of 3.6 million packages of the cookie dough. However, no single source, vehicle, or production process associated with the dough could be identified for certain to have contributed to the contamination.

    The researchers could not conclusively implicate flour as the E. coli source, but it remains the prime suspect. They pointed out that a single purchase of contaminated flour might have been used to manufacture multiple lots and varieties of dough over a period of time as suggested by the use-by dates on the contaminated product.

    Flour does not ordinarily undergo a kill step to kill pathogens that may be present, unlike the other ingredients in the cookie dough like the pasteurized eggs, molasses, sugar, baking soda, and margarine. Chocolate was also not implicated in this outbreak since eating chocolate chip cookie dough was less strongly associated with these illnesses when compared with consuming other flavors of cookie dough.

    The study authors conclude that "foods containing raw flour should be considered as possible vehicles of infection of future outbreaks of STEC."

    During the investigation, three strains of STEC were discovered in one brand of cookie dough — although it wasn't the same strain involved in the outbreak.

    Manufacturers should consider using heat-treated or pasteurized flour, in ready-to-cook or ready-to-bake foods that may be consumed without cooking or baking, despite label statements about the danger of such risky eating practices, the authors conclude. In addition, manufacturers should consider formulating ready-to-bake prepackaged cookie dough to be as safe as a ready-to-eat food item.

    Eating uncooked cookie dough appears to be a popular practice, especially among adolescent girls, the study authors note, with several patients reporting that they bought the product with no intention of actually baking cookies. Since educating consumers about the health risks may not completely halt the habit of snacking on cookie dough, making the snacks safer may be the best outcome possible.

    A Novel Vehicle for Transmission of Escherichia coli O157:H7 to Humans: Multistate Outbreak of E. coli O157:H7 Infections Associated With Consumption of Ready-to-Bake Commercial Prepackaged Cookie Dough—United States, 2009
    http://www.oxfordjournals.org//our_journals/cid/prpaper.pdf

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  • Posted: September 13th, 2011 - 12:39am by Doug Powell

    rare.hamburger.jpg

    Federal food safety officials said on Monday they would ban the sale of ground beef containing six toxic strains of E. coli bacteria that have increasingly been showing up in the food supply, taking a long-delayed step that was opposed by many in the meat industry.

    Dr. Elisabeth Hagen, the head of food safety for the Department of Agriculture, which regulates meat, told the New York Times, “This is one of the biggest steps forward in the protection of the beef supply in some time. We’re doing this to prevent illness and to save lives.”

    The new rule means that six lesser-known forms of E. coli will be treated the same as E. coli O157:H7, which was declared an adulterant in 1994.

    The American Meat Institute said in a statement, “Imposing this new regulatory program on ground beef will cost tens of millions of federal and industry dollars — costs that likely will be borne by taxpayers and consumers. It is neither likely to yield a significant public health benefit nor is it good public policy.”

    While several outbreaks caused by the Big Six E. coli strains have been linked to produce, the group pointed to the fact that only one has been tied to ground beef. In that outbreak, which occurred last year, three people were sickened.

    Some meat processors have begun to test for the six strains in recent months in anticipation of federal action, but many others will most likely begin testing once the new rule takes effect.

    Under the rule, any meat that is found to contain the Big Six E. coli, in tests by government or industry, will have to be diverted for use in cooked products. The bacteria is killed by heating the meat to 160 degrees.

    USDA estimated that the new rule would cost the industry up to $10 million a year for testing and diverting meat to cooked products.

    Details will be discussed at a press conference hosted by USDA on Tuesday morning.

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  • Posted: August 15th, 2011 - 10:17pm by Doug Powell

    The Weber-Morgan Health Department said today that E. coli has been found in the water of the Ogden Valley summer camp where 11 girls got sick.

    Department spokeswoman Lori Buttars said "we received the confirmations of our tests today, and we found E. coli bacteria in the kitchen water and spigots at Camp Shawnee and Camp Ben Lomond, so we are in the process of working with them to fix that situation, and in the meantime people who go there will need to bring in their own water and use it for everything."

    The girls got sick after spending Aug. 2 to 5 at Camp Shawnee. They were part of a group of 45. The girls complained of severe abdominal pain, diarrhea and nausea.

    The story does not say what strain of E. coli was involved but a previous story noted a shiga-toxin producing E. coli (STEC) was involved in the ollnesses.

    Camp Shawnee and Camp Ben Lomond are girls and boys camps respectively.

    They are located near Eden and share a common water system. The camps are owned by the Church of Jesus Christ of Latter-day Saints.

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  • Posted: July 25th, 2011 - 8:15pm by Doug Powell

    hamburger.grind_.jpg

    Elizabeth Weise writes in the USA Today today or tomorrow that a growing chorus of lawmakers, food-safety and consumer advocates are is demanding the six other non-O157 shiga toxin producing E. coli strains – the Big 6 – be declared illegal in meat as E. coli O157:H7 was in 1994. And edited version of the story is below.

    In the absence of specific federal oversight, however, some companies have begun their own testing for these pathogens to protect consumers and their own bottom lines.

    First out of the chute was Costco, which began testing its ground beef two months ago. Beef Products Inc., the nation's largest supplier of lean beef, began testing on July 18.

    There's also movement in the produce and leafy greens world, where multiple producers and retailers have been testing for E. coli O157:H7 since the spinach outbreak that almost wiped out the leafy green vegetable market in 2006.

    In the past few months, newly available tests have made it possible to check for a broader number of the microbes and they now include the harmful group of E. coli strains beyond O157:H7 known as the Big Six.

    The reasons these bugs aren't currently regulated are a mix of politics, money and plain biology — the bacteria are constantly evolving and turning up new and nastier forms, making writing rules about them a bit of a nightmare.

    For example, the German E. coli variant that sickened more than 4,075 in Europe and killed 50, including one Arizona resident who traveled to Germany, wasn't known before this spring (and is not part of the Big 6).

    As it stands now, any meat that tests positive for the O157:H7 form of E. coli has to be removed from the market. But for other types of E. coli that are known to harm humans, it takes an illness to trigger a recall, says Nancy Donley, of STOP Foodborne Illness, a food-safety advocacy group started by parents who've lost children to these pathogens. "This is clearly not as it should be," she says.

    The push to get these debilitating but non-O157:H7 forms of E. coli regulated has been coming for a long time. The Centers for Disease Control and Prevention has long required they be reported.

    But as tests become available, some companies aren't waiting for the feds to act. In the last six months, test kits for leafy greens have become available for the Big Six E. coli variants from IEH Laboratories in Lake Forest Park, Wash.; DuPont Qualicon in Wilmington Del.; and BioControl Systems in Bellevue, Wash.; and others are in the works. For ground beef, they're in late testing phase or became available in the past two months. In just the past two weeks, tests for the German E. coli O104:H4 variant hit the market.

    IEH Laboratories has been testing for a broad range of these pathogenic E. colis for years now. "We had been finding a lot of these things in products right and left," says President Mansour Samadpour.

    A table of non- E. coli O157 STEC outbreaks is available at http://bites.ksu.edu/nonO157outbreaks
     

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  • Posted: July 16th, 2011 - 5:52am by Doug Powell

    The New York Times reports this morning that two major American companies, Costco Wholesale and Beef Products Inc., have gotten tired of waiting for regulators to act on non-O157 STECs (shiga-toxin producing E. coli) and are proceeding with their own plans to protect customers.

    Last month, Costco, one of the nation’s largest food retailers, quietly began requiring its suppliers of bagged produce, including salad greens and mixes, apple slices and baby carrots, to test for a broad range of toxic E. coli.

    “We know this is where we have to go and there’s no reason to wait,” said Craig Wilson, the food safety director of Costco. In the last two weeks, he said, most produce suppliers have added a test that can detect the strain from the European outbreak as well (E. coli O104).

    The company also plans to test all of the ground beef sold at its warehouse stores. Costco operates a large ground beef plant in Tracy, Calif., and Mr. Wilson said the plant recently began evaluating testing procedures to detect the broader range of E. coli in the hamburger it makes and the beef trimmings that go into it.

    As an added step, the company plans to ask suppliers of the trimmings to do their own testing, starting later this summer, he said.

    Costco’s new testing requirements come as the federal government continues to drag its feet on what to do about the expanding E. coli threat. After four years of study, the United States Department of Agriculture finished drafting rules in January for how the industry should handle the “Big Six” E. coli in ground beef.

    But the proposal has been stalled within the Office of Management and Budget, which reviews most federal regulations before they are released. Details of the proposal are confidential, but many in the industry expect that the rules would require testing or even make it illegal to sell ground beef that contained the additional strains of toxic E. coli.

    The landscape is changing partly because tests created by U.S.D.A. scientists that can quickly pinpoint the presence in food of the “Big Six” E. coli are now being developed for commercial sale by test-kit companies. Some kits are already on the market.

    A table of non- E. coli O157 STEC outbreaks is available at http://bites.ksu.edu/nonO157outbreaks

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  • Posted: July 14th, 2011 - 11:06am by Doug Powell

    According to a press release, Beef Products, Inc. (BPI), the world's leading producer of lean beef, has announced that the company is expanding its food safety program by testing for an additional six pathogenic forms of E. coli.

    The new policy is part of the company's hold-and-test quality assurance program through which BPI samples its lean beef prior to sale, holds the lean beef, and tests for the presence of pathogens. Only after determining the test results are negative will beef be sold or used for raw ground beef.

    Craig Letch, BPI's Director of Quality Assurance, said "BPI led the hold and test initiative and has applied its own rigorous program for more than 15 years, and we are now expanding our testing even further to include testing for these other potentially harmful bacteria."

    "Our goal is to provide the safest and highest quality beef. Using newly available testing methods, we are able to add tests for these additional STECs beyond O157:H7, which will help us further ensure the safety and quality of our lean beef and that consumers are better protected from potential exposure to these harmful pathogens."

    "With the test methods still developing for these six strains, the recent situation in Europe convinced us that it was time to add tests for these other potentially harmful pathogens now," said Letch. "While this additional testing will add significantly to the cost of BPI's current hold and test program, our decision to voluntarily start this.

    Will the results be public?
     

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  • Posted: June 15th, 2011 - 9:47pm by Doug Powell

    At least five children were hospitalized for food poisoning of a rare type of E. coli in France. At least 4 of them had eaten frozen hamburgers sold by Lidl stores.

    The serotype is not the same as in the German outbreak, according to authorities.

    The 5 children are aged from 20 months to 8 years and one of them was hospitalized this weekend in a pediatric unit. All five victims had serious bloody diarrhea and suffering from hemolytic uremic syndrome, explained Dr. Joëlle Perrin, medical advisor in the regional health agency.

    Health authorities have identified that four of the five children ate frozen beef burgers from the Steaks Country brand sold in Lidl stores.
     

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