Temperature

  • Posted: February 10th, 2012 - 12:52pm by Doug Powell

    In a triumph of food porn over food safety, an investigation into an outbreak of salmonellosis in the summer of 2010 after a wedding party in Bavaria, Germany that sickened at least 52 people failed to pinpoint a specific food source but did uncover a number of disturbing food safety practices – such as adding rose petals to food and no temperature checks -- again linked to an unlicensed caterer.

    German researchers report in Eurosurveillance this week that in the summer of 2010, a local health office in northern Bavaria, Germany, was informed that approximately half of the 110 guests of a wedding that had taken place the preceding weekend had contracted gastroenteritis. At the wedding party, soup and a late-lunch buffet (served from 3 p.m.) and a cold dinner buffet (served from 10 p.m.) had been provided by an out-of-town caterer. In addition, a wedding cake made by a local bakery and a number of cakes and desserts contributed by different wedding guests were served by the catering staff at 20.00. The food served at the wedding was suspected to be the source of the outbreak. Initial laboratory results of stool samples of some guests who became ill indicated Salmonella enterica subsp. enterica serovar Enteritidis (S. Enteritidis) as the causative pathogen.

    According to the caterer, only the meat dishes were prepared at the caterer’s facilities in advance. All sauces, antipasti and salads were made from commercially produced ingredients and were prepared at the wedding party venue. Food items that required cooling were transported in cooling boxes and stored in cooling units at the venue. At the venue, the lunch buffet was set up for six hours, between 2 p.m. (the buffet was set up one hour before it was available to guests) and 8 p.m. No checks were carried out of holding temperatures of the warm or cold dishes. Salads and other cold dishes were not cooled during this period. Photographs of the buffet showed that a number of the cold dishes were decorated with non-edible flowers (such as roses), which were inserted into the food. The flowers had been purchased at a wholesale retailer. Cakes supplied by a number of wedding guests were stored without cooling until they were served at 20:00. The dishes of the dinner buffet were not cooled. They were first served at 10 p.m. It is unclear for how long the dishes of the dinner buffet were served; however, it is known that the catering personnel departed at 00.30.

    Inspection of the catering facilities and interview of the catering staff revealed a number of shortcomings contravening European food hygiene regulations. The facilities used by the caterer were not registered with the local authorities. There were no records of the required staff training on food hygiene. No temperature controls of cooling devices or transport boxes were carried out, nor were temperatures monitored during preparation or serving of warm dishes. There were no records of HACCP concept planning or implementation. The company was banned from catering until proof of changes in their practices had been provided to the local authorities.

    The cohort study showed that a variety of dishes were associated with a significantly increased risk of infection: in particular consumption of a group of lunch dishes containing mayonnaise was associated with a high relative risk. Despite the constraint of a two-week delay between the wedding party and the questionnaires being sent out, participants appeared to recollect well which dishes they had consumed.

    The isolation of S. Enteritidis from two of the food samples at the wedding party was judged to show that the food served posed a health risk, as all the food items were ready for consumption without requiring further preparation or heating. The isolation of indistinguishable Salmonella strains from the food samples as well as from stool samples of respondents and catering personnel supported the hypothesis that the outbreak was foodborne.

    There are several possibilities for the source of the Salmonella contamination in this outbreak. Mayonnaise is a well-recognized vehicle of contamination when raw egg is used as an ingredient. However, in this outbreak all cold dishes and salads were made from commercially prepared ingredients. As commercially produced mayonnaise and sauces are conventionally based on pasteurized ingredients, it is unlikely that they would be the primary source of contamination. Commercial mayonnaise by itself is also not suitable for Salmonella propagation, due to its low pH adjusted by acetic acid. However, addition of mayonnaise to other salad ingredients may alter the overall acetic acid concentration of the mixture, thus providing a suitable base for proliferation once the pathogen has been introduced by secondary contamination.

    The environmental investigation revealed a number of infringements of food safety regulations, including a lack of staff training and the absence of records of a food safety concept according to the HACCP principles. Lack of temperature controls for food storage and transport as well as prolonged presentation of buffet dishes at room temperature provided ideal conditions for pathogen proliferation, regardless of the primary source of contamination.

    While they do not replace official controls, the HACCP principles are central to the European concept of food safety by helping food business operators to attain a high standard of food safety. Successful implementation of procedures based on the HACCP principles requires the full cooperation and commitment of food business employees. Adequate training of personnel is central to achieving this goal.

    The outbreak investigated in this study demonstrates the consequences of lack of staff training and the failure to identify hazards to food safety, as well as failure to implement control measures to mitigate such hazards. The use of flowers as food decoration demonstrated insufficient understanding of the potential for contamination through products that are not intended for food production and therefore not subject to food hygiene regulations.

    Intelligently implemented food hygiene concepts not only benefit the consumer but are also very much in the interest of the food business operator, whose business can be threatened by food-borne outbreaks. Initial hygiene and food safety training for food business operators should therefore also explain microbiological principles underlying food safety practices in order to equip the businesses with the required background knowledge and motivation to design and implement an intelligent food safety/HACCP concept, including the consideration and identification of potential sources of contamination. Explicit mention of the dangers of the use of non-edible flowers for decoration should be considered in guides to good practice, which are a valuable instrument to aid food business operators with compliance with food hygiene rules and with the application of the HACCP principles.

    The complete paper is available at http://www.eurosurveillance.org/ViewArticle.aspx?ArticleId=20076.

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  • Posted: December 17th, 2011 - 1:46am by Doug Powell

    With five daughters, I’ve put in my share of time at the fundraising-BBQ- cookout, or in Aussie-speak, sausage sizzle.

    Last night was the Christmas concert for Sorenne’s pre-school, which was somewhat surreal the first time – outdoors, everyone in shorts and flip-flops or dressed up fancy-like. For a sub-tropical climate in summer, they go a little nuts about the Christmas thing, with surfin’ Santa’s and shrimp on the barbie by the beach.

    I proudly wore my Kansas State hockey shirt (there is no K-State hockey) and waved around my Comark PDT 300 tip-sensitive digital thermometer – which wasn’t necessary because the staff had precooked the sausages. But as the hundreds of parents and kids poured in (dozens?) me and John Hodgman-lookalike, Clayton, resorted to cooking raw sausage, and the thermometer became a necessary aide.

    No children were harmed in this sausage sizzle.

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  • Posted: September 22nd, 2011 - 2:43pm by Doug Powell

    So much for the cold-chain.

    13 Investigates – the voice of Indiana – found beef, pork, chicken, eggs, milk, and produce being transported in hot trucks that do not have proper refrigeration.

    "If it's happening here in Indiana," it's happening in Texas and North Carolina and California," said Capt. Wayne Andrews, who oversees Indiana State Police's Motor Carrier Enforcement Division. "This is not just an Indiana problem and we need to do more to address it."

    "It's just not working properly and it had approximately a 94.7 degree reading at the time of the traffic stop," explained ISP Trooper Ashley Hart, standing next to a hot truck she pulled over along Interstate 65 near Lafayette. The truck was carrying raw meat, eggs and produce from a warehouse in Chicago to restaurants in Indianapolis.

    "It's absolutely disgusting," she added.

    13 Investigates first exposed the problem in July as state police partnered with local health departments to keep spoiled food from hot trucks off Hoosier dinner plates. Since then, the danger has not gone away.

    "The problem is growing," said Andrews, whose motor carrier inspectors have found more hot trucks than they ever expected.

    Last week, on a 92-degree day, state police stopped a food truck heading northbound on Interstate 69 near Muncie. The truck's refrigeration unit was broken and inside, eggs, pork, shrimp, and fish were found to be 66 degrees. Food safety inspectors from the Delaware County Health Department say that is both dangerous and illegal.

    Indiana's effort to crack down on hot trucks is about to get some national exposure. After seeing WTHR's investigation, NBC's TODAY Show has decided to highlight this problem as a national issue. TODAY sent a crew to Indiana last week and will feature a special report on hot trucks September 22 -- this Thursday morning. You can see the report on Channel 13.

     

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  • Posted: September 7th, 2011 - 9:02pm by Doug Powell

    MYNorthwest.com reports improper cooking techniques have resulted in ‘dangerously undercooked’ hamburger patties being served at Burger King restaurants across Washington State, and health officials are concerned the problem could be happening in franchises nationwide.

    The Tacoma-Pierce County Health Department first reported the problem on July 29 after a routine health inspection resulted in a ‘potentially hazardous’ violation at a Burger King in Puyallup. The inspector expressed concern to her supervisors that the undercooked meat was due to a glitch with equipment, and the incident might not be isolated.

    "So we went ahead and proactively inspected all 13 of their outlets in Pierce County," said Dr. Anthony Chen, Director of Health for the Tacoma-Pierce County Health Department. The inspector was right; roughly half of Pierce County locations were serving undercooked meat.

    "We spoke to the Department of Health and turned it over to them," Chen said.
    After discovering similar violations across at least 10 counties statewide, the State Health Department sent Burger King a letter on September 1, with their findings.

    Among the potential dangers detailed in the letter was a concern with the "Duke Flamebroiler," the piece of equipment that is meant to give Burger King hamburgers their signature flame broil. Products coming off the broiler were sometimes undercooked as "broken ceramic tiles" inside the units reduced the cook temperatures and allowed insulation to fall onto the food.

    There were also several concerns with employee error. For instance, employees "did not know how to take final cook temperatures of burgers." Some workers "did not know that undercooked patties should be discarded," and believed a brief microwave step would "remedy" any issues with undercooking.

    What the story doesn’t say is how to properly temp a burger and whether thermometers were even present?

    Denise Wilson, Global Communications Manager for Burger King, wrote in an email to KIRO Radio that, "Burger King Corp. has recently been made aware of the findings from the Tacoma-Pierce County Health Department and is investigating the matter to determine if all proper cooking protocols were followed. Additionally, BKC has been in contact with the local franchisees and they are taking immediate corrective measures to ensure that their restaurants are meeting the company's stringent food safety standards."

    The State will be following up.

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  • Posted: August 8th, 2011 - 2:09am by Doug Powell

    Sorenne has been going to full-time daycare – she doesn’t like that term so we call it school – since arriving in Australia. At 2-and-a-half years old, we knew she was getting bored with us, and needed to be hanging out with other kids.

    The kids all have to wear sunhats, and high-powered sunscreen is applied liberally, not the mild stuff used in North America.

    Amy’s been making a lunch every day, and I’m starting to help out. Today is was leftover spaghetti, cheese, a yoghurt (anything pre-packaged is wildly expensive, with those little yoghurts going for about $1.20 each) and apple slices. Everything is labeled Sorenne, and it goes into the fridge as soon as we arrive. Seems like a good system.

    But after dealing with the tyranny and boredom of school lunches for about 12 years with the four Canadian daughters, I’m well aware of the challenges: most schools don’t have fridges for kids to use. Standard advice is to pack food with ice packs or use cooler bags, but that may not be enough.

    Researchers at the University of Texas, Austin, measured the temperatures of food in bag lunches 90 minutes before children at air-conditioned Texas child-care centers were scheduled to eat them.

    Ninety percent of the lunches were in insulated bags. Even so, the results were disgusting.

    Less than 2 percent of the perishable items were in what the researchers deemed a safe temperature zone: less than 39.2 degrees or more than 140 degrees. Only 14 of 618 items — they focused on meats, dairy products and vegetables — in lunches with one ice pack were a safe temperature. Multiple ice packs weren’t much better: Just 5 of 61 items were safe.

    Unsafe temperatures allow bacteria to grow, increasing the odds that kids will get a nasty foodborne illness, Fawaz Almansour, lead author of the new study, said.

    The study, published Monday in Pediatrics, did not look at how many kids actually got sick. The important thing, Almansour said, is that their lunches put them at risk for a long list of bugs. Children younger than four are especially susceptible to foodborne illnesses.

    The authors wrote, “These results indicate an urgent need for parents and childcare personnel to be educated in safe food practices.”

    As usual, there were no recommendations for how this education was to magically happen.
     

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  • Posted: July 23rd, 2011 - 7:32am by Doug Powell

    En 2006, six personnes ont présenté des cas de botulisme en Géorgie, Floride et Ontario qui ont été tracés jusqu’à du jus de carotte. Une personne en est décédée. Une mauvaise température de conservation du jus a été un facteur-clé pour ces personnes.

    Que pouvez-vous faire :
    • si vous vendez des aliments qui nécessitent d’être réfrigérés pour maintenir la salubrité, informez vos clients clairement et de façon répétée
    • savoir quels sont vos aliments qui doivent être réfrigérés ; vérifiez l’étiquetage des ingrédients présents et suivez les instructions
    • surveiller la température de vos réfrigérateurs afin de s'assurer qu'elle soit en dessous de 5°C

    Les consommateurs ne lisent pas toujours l’étiquetage ou ne suivent pas toujours les instructions présentes

    Un homme de 29 ans de l'Ohio et une femme de 41 ans de Géorgie sont tombés malades en janvier 2011 après avoir mangé une soupe de pommes de terre produite industriellement qui contenait de la toxine de Clostridium botulinum, qui avait été achetée réfrigérée auprès de commerçants et étiquetée « A conserver réfrigérée ». Après avoir conservé la soupe à température ambiante pendant un certain temps avant de la manger, les deux personnes ont développé des symptômes du botulisme.

    Chaque cas a nécessité une hospitalisation de longue durée et ils ont été placés sous assistance respiratoire après avoir connu des symptômes de vertiges, de vision floue et des difficultés à respirer.

    Dans un cas, la soupe avait été achetée en décembre, chez un commerçant local dans une vitrine réfrigérée, mais elle avaient été conservée sans réfrigération au domicile de la victime pendant 42 jours.

    Dans l'autre cas, la victime a conservé la soupe à température ambiante pendant 18 jours.

    La toxine dangereuse entraînant le botulisme se forme lorsque les spores de Clostridium botulinum germent puis se développent dans un aliment à faible acidité, en l’absence d’oxygène et à température ambiante. Étant donné que ces soupes ne sont pas traitées pour tuer les spores de Clostridium botulinum, la seule mesure de maîtrise du botulisme est de conserver le produit
    réfrigéré.
     

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  • Posted: July 1st, 2011 - 8:29am by Doug Powell

    Chef Ramsey’s kitchen rage is topped only by Donald Trump’s hair, rants, and famous line “you are fired.”

    The final challenge on Ramsey’s latest show was to determine which of two chefs stays one more week by cooking three steaks each, one rare, one medium, and one well done. As one of the chefs uses a tip sensitive digital thermometer to check temperatures, Chef Graham Elliot comments something along these lines – every time he uses the thermometer, he lets those juices flow out.

    According to the USDA’s Food Safety and Inspection Service, medium steaks should be cooked to an internal temperature of 160º F, well done 170º F and rare is not listed, but it’s usually around 120º-125º F (no one really knows). Four out of the six steaks looked pretty much the same (right, exactly as shown), so we’ll never know what the temperatures were.

    When I ask for my steak to be rare, get it to at least 120º F and don’t even think about using the cheek or hand tests.

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  • Posted: May 10th, 2011 - 9:45am by Doug Powell

    Nathan Hale School in New Haven had an inspection in March that found chicken was being served to children at a temperature that can carry bacteria. Inspectors did not go back to the school to re-inspect until December, when they found the same problem.

    In October 2010, local health inspectors in Meriden found rodent droppings in the cafeteria of Maloney High School, as well as dirty cabinets and other health violations. Inspectors didn’t go back last year to check to see if the problems were remedied.

    In Stamford last year, nine of 32 schools did not have their cafeterias inspected, with the remaining schools inspected fewer than the three times a year required under state regulations.

    Those are the findings of a team of journalists and interns reporting for the New Haven Independent.

    Paul Kowalski, New Haven’s environmental health director, said, “There is no way we are meeting the state mandate on inspections. I have three sanitarians and over 1,100 food establishments to inspect.”

    A review of more than 1,700 inspection reports from 103 cities and towns in 2010 found that many local health agencies, responsible for ensuring that school cafeterias are safely preparing and serving food to children, are not meeting the state Public Health Code on mandated annual inspections. Of the 38 health agencies overseeing those towns, at least half were not meeting the state requirement, the review shows.

    In addition to failing to meet the required number of inspections, the review found that timely re-inspections of cafeterias cited for violations were rare.

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  • Posted: March 31st, 2011 - 8:02am by Doug Powell

    Is cooking food until it’s ‘piping hot’ a science-based recommendation?

    The Food Standards Agency has published its updated Strategy to 2015, Safer food for the nation with five core principles:

    • putting the consumer first;
    • openness and transparency;
    • science and evidence-based;
    • acting independently; and,
    • enforcing food law fairly.

    And six core outcomes:

    • foods produced or sold in the UK are safe to eat;
    • imported food is safe to eat;
    • food producers and caterers give priority to consumer interests in relation to food;
    • consumers have the information and understanding they need to make informed choices about where and what they eat;
    • regulation is effective, risk-based and proportionate, is clear about the responsibilities of food business operators, and protects consumers and their interests from fraud and other risks; and,
    • enforcement is effective, consistent, risk-based and proportionate and is focused on improving public health.

    Sounds great. But what are the details?

    Of the estimated £135m annual budget, £20m is allocated to ensuring consumers have information necessary to make informed food choices, with priorities for improving public awareness about good food hygiene at home; increasing visible information on hygiene standards when consumers eat out or shop; and improving public awareness of healthy eating.

    For that amount of money, the science-based FSA could do much better than telling citizens their meat is safe when it’s “piping hot” and “the juices run clear.”

    Piping hot is not science or evidence-based; color is a lousy indicator of safety; using a tip-sensitive digital thermometer is the only safe way to determine if food has reached a safe temperature.

    FSA also states “The strategy is written in a way that consumers can understand and explains the range of work we do across the UK.“

    It’s not clear whether anyone asked consumers if they could understand, but FSA did state one of its main priorities was to “improve public awareness and use of messages about good food hygiene practice at home.”

    Use of messages improves nothing; using practices recommended in messages may translate into fewer sick people, but those messages need to be evidence-based.
     

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  • Posted: March 28th, 2011 - 9:09pm by Doug Powell

    Traducido por Gonzalo Erdozain

    Resumen del folleto informativo mas reciente:

    - El brote de Salmonella que enfermó a 1,500 personas en el 2008 fue causado por pimientos
    - Platos con tomates y pimientos dejados a temperatura ambiente pueden haber empeorado el brote
    - Refrigere platos con tomates a temperaturas iguales o menores a 41°F

    Los folletos informativos son creados semanalmente y puestos en restaurantes, tiendas y granjas, y son usados para entrenar y educar a través del mundo.

    Si usted quiere proponer un tema o mandar fotos para los folletos, contacte a Ben Chapman a benjamin_chapman@ncsu.edu.
    Puede seguir las historias de los folletos informativos y barfblog en twitter
    @benjaminchapman y @barfblog.


     

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