Category Archives: Research

E.coli HUS Syndrome

Food Poisoning Bulletin

These are 10 things you should know if your child has an E. coli infection or has been diagnosed with HUS:

  • When your child is diagnosed with E. coli and/or HUS, you should contact your local health department immediately because additional testing needs to be done to determine if your child’s case of E. coli-HUS is part of an outbreak of illnesses. This is important because you may be able to provide information to health officials that helps them find the source of the outbreak.
  • You should not throw away food you have that you suspect is the source of your child’s E. coli infection.  The food may need to be tested for the presence of E. colibacteria and may be the “smoking gun” that determines the source of the outbreak.
  • The food eaten immediately before onset of illness is generally not the cause of the illnessbecause the incubation period for E. coli is from 3 to 10 days.
  • Because of the long incubation period, finding the source of an outbreak of E. coli-HUS can be difficult.During that time, the contaminated food responsible for the illnesses may have been eaten or thrown out. Even if a specific food source is not found, the outbreak investigation may lead to a legally responsible party, such as a restaurant.
  • Quickly finding the source of an E. coli-HUS outbreak can help prevent additional illnesses.
  • The CDC recommends that antibiotics not be used for E. coli infectionsbecause these medications increase the risk of developing HUS. You should make sure your doctor is aware of this.
  • Medical research and better understanding of HUS by medical professionals has improved care for HUS patients, lowering the mortality rate. Even if your child is extremely ill, he or she will most likely survive.
  • HUS may result in major long-term complications, including chronic renal failure, neurologic dysfunction, and hypertension.
  • Even if your child appears to have recovered, he or she is at greater risk of developing kidney problems in the future, including renal failure, and may need a kidney transplant.

It should be noted that a closely related illness, thrombotic thrombocytopenic purpura (TTP), is also caused by infection with  Shiga-toxin producing E. coli (generally E. coli O157). In adults, the diagnosis for E. coli victims with kidney failure is often TTP-HUS and often involves neurological problems, including stroke, that result in permanent brain damage.

EFSA – Scientific Opinion – Food Safety Risk Management of Composite Foods

EFSA

This Opinion reviews the factors that affect microbial survival and growth in composite products, and in foods in general. It concludes that the main factors to be considered are: water activity, pH, temperature and duration of storage, processing, and intensity and duration of other non-thermal physical processes applied. Prevalence and concentration of the pathogens in food are important to determine the risk for consumers. The opinion presents a review of the quantitative microbiology models and databases that can be used to provide quantitative estimations of the impact of the above factors on the survival and growth of the main bacterial pathogens. In composite products, migration and diffusion of moisture and substances among the ingredients may change their physico-chemical parameters, particularly at the interfaces. Therefore, the assessment of the risk posed by composite products needs to consider the combinations of parameters most permissive to survival and growth of pathogens. Two complementary approaches are proposed for the identification and profiling of microbiological hazards in different specific composite products. The first one is based on past outbreaks and prevalence of hazards in the products and leads to the conclusion that the most frequent hazard-composite product combinations are Salmonella in cakes and bakery products. The second one consists in decision tools based on the impact on the pathogens of food composition and food processing. Categorisation of the risk for composite products requires information on their composition, processing and further handling, which can largely differ for foods belonging to the same category. Further conditions may influence the risk and should be verified, i.e. hygienic conditions during preparation of the composite products and their ingredients, shelf-life conditions, and reliability of cooking by consumers to inactivate pathogens. The decision tools developed apply to all composite products considered by the mandate, as well as to all other foods.

FSA – Food Safety Videos Link

FSA

The Food Standards Agency has published 10 short videos to help caterers produce food safely. Each video is about a minute long and covers specific food hygiene practices.

These training resources are designed to illustrate messages within the ‘Safer food, better business’ packs and they follow the same innovative and practical approach to food safety management as the packs.

The videos provide best practice guidance on a number of potential food safety issues, such as:

  • effective handwashing
  • chilling foods down as quickly as possible
  • checking that foods are cooked thoroughly
  • effective cleaning
  • what to do if a member of staff is ill at work
  • keeping pests out of your business, what to look for and the action to take

The films are being used as part of a training programme, funded by the Agency, to coach catering businesses in Olympic host boroughs in order to help raise standards and compliance levels.

The videos are available via the Agency’s YouTube channel.

FSA – London 2012 Food Safety

FSA

The Food Standards Agency has published a toolkit and newsletter for stakeholders to support their participation in the Agency’s Play it Safe campaign. This campaign is helping to ensure that food bought, cooked and eaten during the 2012 Olympics is safe.

The toolkit provides suggestions on how stakeholders, such as food businesses, tourism groups and trade associations, can contribute to the campaign. These include posting details of the campaign on company websites and in newsletters, using social media and issuing press releases. The toolkit also answers frequently asked questions about the campaign and about food hygiene and safety.

The newsletter, the first in the campaign, explains the work being done to protect consumers during the Olympics. It also includes details on how to subscribe to future editions.

CDC – Five Multistate Outbreaks of Human Salmonella Infections Linked to Small Turtles

CDC

Contact with reptiles (such as turtles, snakes, and lizards) and amphibians (such as frogs and toads) can be a source of human Salmonella infections. Small turtles, with a shell length of less than 4 inches, are a well-known source of human Salmonella infections, especially among young children. Because of this risk, the Food and Drug Administration (FDA) has banned the sale and distribution of these turtles since 1975. Amphibians and reptiles can carry Salmonella germs and still appear healthy and clean. Salmonella germs are shed in their droppings and can easily contaminate their bodies and anything in areas where these animals live. Reptiles and amphibians that live in tanks or aquariums can contaminate the water with germs, which can spread to people.

HPA – UK – Campylobacter Still Number 1 in 2011

HPA

Eighty three general outbreaks of foodborne infectious disease in England and Wales were reported in 2011 to the HPA’s electronic Foodborne and Non-foodborne Gastrointestinal Outbreak Surveillance System (eFOSS)[§]. In the previous year there were 63 outbreaks of foodborne diseases (figure 1).

The rise in the number of general outbreaks in 2011 could be due to the continued increase in outbreaks caused by Campylobacter spp (20/83 in 2011; 18/63 in 2010) and a rise in the outbreaks caused by Salmonella spp compared to the previous year (18 in 2011; 8 in 2010).

Outbreaks of campylobacter have increased since 2009 and concurrently campylobacter is now the most frequently implicated causative agent in reported outbreaks representing 24% of all outbreaks [1,2 ]. In 2011, as in preceding years, most campylobacter outbreaks were associated with consumption of undercooked poultry liver pâté or parfait f rom food service establishments [3,4]. Salmonella spp. accounted for 22% of the outbreaks, most of which were caused by an increase in S. Enteritidis non PT 4 (44%, 8/18) or S. Typhimurium (33%, 6/18). The next most frequently identified agents included: norovirus (10%, 8/83), VTEC O157 (10%, 8/83) and Clostridium perfringens (8%, 7/83)

Use of Microbiological Indicators for Assessing Hygiene Controls for the Manufacture of Powdered Infant Formula

Ingenta

Microbiological testing for various indicator microorganisms is used extensively as a means of verifying the effectiveness of efforts to ensure the microbiological quality and safety of a wide variety of foods. However, for each use of an indicator organism the underlying scientific assumptions related to the behaviour of the target microorganism, the characteristics of the food matrix, the details of the food manufacturing processes, environment, and distribution system, and the methodological basis for the assay must be evaluated to determine the validity, utility, and efficacy of potential microbiological indicator tests. The recent adoption by the Codex Alimentarius Commission of microbiological criteria for powdered infant formulae and related products provides an excellent example of an evidence-based approach for the establishment of consensus microbiological criteria. The present article reviews these criteria and those of various national governments in relation to emerging principles for the evidence-based establishment of effective indicator organisms.

USDA – New Traceback Policy for Ground Beef

Food Poisoning Bulletin

Dr. Elisabeth Hagen, USDA’s Under Secretary for Food Safety, announced in a press conference on May 2, 2012 that the government is changing its traceback policy for contaminated beef that test positive for shiga-toxin producing E. colibacteria (STEC).

“Our keys goals are to strengthen our ability to protect consumers and to bolster prevention-based public safeguards,” she said. “We are going to use traceback policies as a proactive measure, launching the investigations earlier to identify contaminated products before they reach consumers.”

Listeria Subverts Immune Response

Science Daily

Listeria, one of the most deadly causes of bacterial food poisoning, subverts a normally protective immune response to spread its infection more effectively, according to new research at National Jewish Health. Immunologists Laurel Lenz, PhD, Peter Henson, PhD, and their colleagues report online April 26, 2012, in the journal Immunity that production of nitric oxide (NO) by activated macrophages, which is normally thought of as an infection-fighting response, actually helps Listeria monocytogenes to more efficiently disseminate between infected and neighboring uninfected cells.

England and Wales Restaurant Risks Research

Cambridge Journals Online

The food service sector continues to be the most common setting for reported foodborne disease outbreaks in England and Wales. Using restaurant-associated foodborne outbreaks reported in England and Wales from 1992 to 2009, cuisine-specific risk factors were examined. Of 677 restaurant outbreaks, there were 11 795 people affected, 491 hospitalizations, and seven deaths; and Chinese, Indian, British and Italian cuisines were the most commonly implicated (26%, 16%, 13% and 10%, respectively). Salmonella spp. accounted for most outbreaks of all cuisine types, and particularly Chinese (76%, 133/175) and Italian (55%, 38/69). Poultry meat was the most frequently implicated food vehicle in outbreaks associated with Indian (30%), Chinese (21%), and British (18%) cuisines while for Italian cuisine, desserts and cakes were more frequently implicated (33%). Rice dishes were also a common outbreak food vehicle in those restaurants serving Chinese (22%) and Indian (16%) cuisine. Cross-contamination was the biggest contributory factor associated with Chinese (46%), British (33%) and Indian (30%) cuisines whereas inadequate cooking (38%) and use of raw shell eggs in lightly cooked or uncooked food (35%) were more often associated with Italian cuisine. Over the surveillance period, the proportion of Salmonella Enteritidis PT4 outbreaks in restaurants serving Chinese cuisine significantly decreased (P<0·0001) and this was mirrored by an increase in S. Enteritidis non-PT4 outbreaks (P<0·0001). Despite this change in proportion, contributory factors such as cross-contamination have continued to cause outbreaks throughout the 18 years. The results show that by stratifying the risks associated with restaurants by cuisine type, specific evidence of food control failures can be used to target foodborne illness reduction strategies.