April 2012

  • Posted: April 30th, 2012 - 11:51pm by Doug Powell

    Food server, is there transglutaminase in that steak I just ordered?

    That’s what the American Meat Institute says concerned consumers at the restaurant or some big banquet where they’re serving up lots of steaks.

    I ask servers what rare and medium mean. They mutter. I ask them about thermometers. They dream about someone with far away eyes.

    Tales of  transglutaminase, also known in the growing meat slang as meat glue, have been circulating on the Internet for years.

    In March 2011, an Australian TV tabloid show called Today Tonight did what they called an exclusive expose on meat glue, where cheap cuts of meat were allegedly glued together and shaped to look like a fillet mignon.

    Last week, ABC7 San Francisco, proclaimed they had “uncovered another meat industry practice that will have you looking twice at the meat you eat.”

    Maybe ABC7 discovered the Internet, or watched tape (Beta) from Australia.

    The San Fran folks did find a meat company owner, who wouldn't go on camera, saying gluing meat is common practice in the industry and the most glued product by far is filet mignon destined for the food service industry.

    ABC7 says it confirmed this with an industry trade group that meat glue is common where filet mignon is served in bulk -- at a restaurant, banquet, cafeteria or hotel.

    The problem is the outside of a piece of meat comes in contact with a lot of bacteria making its way from slaughterhouse to table. Usually cooking a steak on the outside will kill all that off. The center of a single cut of steak is sterile, that's why you can eat it rare. But glue pieces of meat together and now bacteria like E. coli could be on the inside.

    In the U.S., such an additive has to be labeled at retail – in really, really tiny print that I can’t read, even with my old-man glasses – but what about at a restaurant or a banquet hall?

    "You bring up a valid point, and you know they may not see the label, but what they ought to do if they have concerns, and we understand that consumers, they want to understand where there food is coming from, they should ask their wait staff," says Dr. Betsy Booren of the American Meat Institute.

    Janet Riley, a spokeswoman for the American Meat Institute told msnbc.com, “There’s just no way that gluing chunks of chuck meat together is going to give you filet mignon.”

    It likely wouldn’t make economic sense for restaurants to go to the time and trouble to stick together scraps of meat, given the cost of the transglutaminase, which runs about $40 a pound wholesale, much more than any stew meat they might use.

    “I don’t know where that would be happening; it would be a very expensive thing to do,” said Randall K. Phebus, an associate professor of animal sciences and industry at Kansas State University who specializes in food safety.

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  • Posted: April 30th, 2012 - 10:03pm by Doug Powell

    Has Change.org jumped the shark?

    Students enrolled in the Environmental Justice and U.S. Literature class taught by English Professor Elizabeth Ammons last Thursday collected signatures in Dewick−MacPhie Dining Hall and outside Carmichael Hall for a petition asking that Tufts Dining Services offer more free−range meat options in the dining halls.

    The petition, which is also available online at Change.org, asks Dining Services to dedicate 10 percent of its meat purchases in the 2013−2014 academic year to free−range and to incrementally increase meat purchases to 50 percent free−range by 2020.

    Tufts Daily reports that “non−free−range meat, despite being soaked in ammonia, has 20 times more E. coli bacteria than free−range meat, according to the petition.”

    “The industrial meat system isn’t very clean,” sophomore Kara Daniels, a member of the class, said. “People have died from E. coli outbreaks. It just really affects people.”

    Yes, people die from E. coli outbreaks involving all sorts of foods and feeding conditions. There are lots of capable people at Tufts who can respond to this, but the lit students initiated this one, so, what’s the source? What’s the reference? Show everyone the data.

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  • Posted: April 30th, 2012 - 9:36pm by Ben Chapman

    As illnesses associated with a Salmonella Paratyphi B outbreak climbed to 34 today, the investigation has focused on tempeh produced by Smiling Hara. Blue Ridge Food Ventures, the shared use kitchen where Smiling Hara sets up shop put out a press release tonight stating that they are aware of the investigation, have ceased operation (and shut down processing by at least 20 other businesses).

    According to WSPA, North Carolina Department of Agriculture has announced a recall of 12-ounce packages of Smiling Hara unpasteurized soybean tempeh.

    From the Blue Ridge Ventures release:

    Immediately upon learning of the investigation, Blue Ridge Food Ventures temporarily halted our normal production schedule and began extensive environmental testing as a proactive, voluntary and precautionary measure.

    This is the first time in our six-and-a-half-year history that there has been a food contamination issue among the businesses that use our facility. Blue Ridge Food Ventures was inspected on March 8 by the Buncombe County Department of Health and earned a sanitation rating of 99.5% out of 100.

    About 20 small, local food production companies rent time and industrial kitchen space at BRFV during any given month. Each of these businesses is its own legal entity and operates independent of Blue Ridge Food Ventures. Each business is inspected by the regulatory agency relevant to its product and has its own food production and safety plans.

    Blue Ridge Food Ventures has strict safety protocols in place for the use of our physical facility and equipment. One of those policies requires that all facility users sanitize the kitchen and equipment both BEFORE AND AFTER production. Our scheduling policies for the use of the facility are designed to prevent cross-contamination. There has been no indication of any cross-contamination among the other businesses that use the facility.

    Smiling Hara's website lists a variety of western North Carolina businesses where their product is sold.

     

    Tempeh is made from a soybean paste with added vinegar. Acid-consuming mold is added (from a starter inoculum) and the pH is raised during the process above 5, which could allow for the survival and growth of Salmonella Paratyphi B. Most tempeh is sold as a refrigerated or frozen product and is often served after frying.

     

     

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  • Posted: April 30th, 2012 - 2:33pm by Doug Powell

    Thanks to our French friend, Albert Amgar, for forwarding this item.

    On 15 November 2010, 3 confirmed cases of toxoplasmosis of the same family were reported to the Midi-Pyrénées Regional Health Agency. A collective outbreak of food poisoning was suspected with regard to the single common meal taken on 3 October 2010 that included undercooked lamb’s leg. Clusters of toxoplasmosis cases are rare; therefore, investigations on the episode were conducted.

    Epidemiological, clinical and serological data were collected from the participants in the meal. Genotyping of the strain isolated in the suspected food was performed as well as a traceability investigation.

    All five sensitive people of the seven persons exposed during the meal had a recent uncomplicated evolutionary toxoplasmosis (attack rate 100 %; mean age 21 years). DNA genotyping in the frozen half lamb’s leg revealed a type II. The farm of origin of the lamb could not be identified.

    Our investigations contributed to describe a Toxoplasma food poisoning limited in size, and to determine the origin of the contamination. However, other cases may have gone unnotified, considering the infection is usually asymptomatic. Toxoplasma foodborne illnesses are poorly documented and information on the possibility of contamination due to insufficiently cooked lamb meat should be spread more widely.

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  • Posted: April 30th, 2012 - 1:42pm by Doug Powell

    china.cattle.village.jpg

     Who knew?

    The largest, most-fatal outbreak of E. coli O157 or other shiga-toxin producing E. coli wasn’t sprouts in Germany in 2011, wasn’t roast beef in Scotland in 1996 or Ontario in 1985, wasn’t Japan in 1996 in radish sprouts.

    It was in Xuzhou, China, in 1999: 177 dead, 195 hospitalized with hemolytic uremic syndrome. An estimate of the number sickened was not available.

    A new paper by Chinese researchers examining the E. coli O157:H7 virulence factors involved in the outbreak strain dryly notes, “A less well known massive outbreak of O157:H7 occurred in, China, in 1999 … which has only been reported in Chinese journals.”

    Those extra languages could really come in handy.

    The authors write in PLoS ONE today that,

    “The O157:H7 outbreak occurred between April and September and peaked in June, 1999 with 195 HUS cases and 177 deaths from 52 villages of seven counties in Jiangsu and neighboring Anhui province. Of the 195 cases, 167 (85.6%) were over 50 years old with only two less than 20 years old and 121 (62.1%) were female. The National Institute for Communicable Disease Control and Prevention, China CDC, commenced the outbreak investigation on June 28, 1999.

    “Three and two strains of O157:H7 were isolated in Xuzhou city from fecal screening of 30 HUS and 25 diarrhea patients respectively. Thirty six sera collected from 42 HUS patients (85.7%) tested positive for IgG against EHEC-hemolysin or O157 lipopolysaccharide. Thus both bacterial and serological data confirmed that the outbreak was caused by O157:H7. The source of the infection was investigated using a case-control sample of 146 HUS patients and 840 healthy individuals, matched in age, sex and residence. No hand-washing before eating, consumption of fruits or vegetables without washing, consumption of leftover foods without heating, no fly-net cover for foods and high density of flies in kitchen were found to be statistically associated with infected patients. Using magnetic beads coated with antibodies against the O antigen, O157:H7 was isolated from six of 67 (9.0%) fly specimens, four of 74 (5.4%) raw meats and three of 83 (3.6%) cooked meats. O157:H7 was also isolated from live animals including 32 of 189 (16.9%) cattle, 50 of 605 (8.3%) pigs, 91 of 590 (15.4%) goats and 52 of 604 (8.6%) chickens raised in courtyards of families with and without HUS patients in the same villages.

    “From the epidemiological investigations, the outbreak was mainly associated with peasants living with animals carrying O157:H7 in the household, including goats, pigs, chickens and cattle. Courtyard animals carrying O157:H7 contaminated the surrounding environment through fecal shedding and persons who had poor personal and kitchen hygiene practice were more likely to be infected. It is well established that farm animals are carriers of O157:H7. Additionally we found that 9% of the flies tested were positive for O157:H7 and thus they are important carriers in this outbreak. Flies may not just be mechanical vectors as O157:H7 can multiply inside the fly's mouth and be excreted through fly fecal matter. Therefore poor hygiene and multiple routes of transmission may be the major contributing factors to the massive outbreak. However, increased transmission would have expected to increase number of infections but not higher number of HUS rate and high mortality rate. Host factors may contribute to higher mortality with a disproportional number of HUS cases and deaths in the older age groups. We showed that the outbreak was caused by a new sequence type, ST96.”

    Abstract below:

    A novel Escherichia coli O157:H7 clone causing a major hemolytic uremic syndrome outbreak in China***
    30.apr.12
    PLoS ONE 7(4): e36144.
    Yanwen Xiong, Ping Wang, Ruiting Lan, Changyun Ye, Hua Wang, Jun Ren, Huaiqi Jing, Yiting Wang, Zhemin Zhou, Xuemei Bai, Zhigang Cui, Xia Luo, Ailan Zhao, Yan Wang, Shaomin Zhang, Hui Sun,Lei Wang, Jianguo Xu
    http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0036144
    An Escherichia coli O157:H7 outbreak in China in 1999 caused 177 deaths due to hemolytic uremic syndrome. Sixteen outbreak associated isolates were found to belong to a new clone, sequence type 96 (ST96), based on multilocus sequence typing of 15 housekeeping genes. Whole genome sequencing of an outbreak isolate, Xuzhou21, showed that the isolate is phylogenetically closely related to the Japan 1996 outbreak isolate Sakai, both of which share the most recent common ancestor with the US outbreak isolate EDL933. The levels of IL-6 and IL-8 of peripheral blood mononuclear cells induced by Xuzhou21 and Sakai were significantly higher than that induced by EDL933. Xuzhou21 also induced a significantly higher level of IL-8 than Sakai while both induced similar levels of IL-6. The expression level of Shiga toxin 2 in Xuzhou21 induced by mitomycin C was 68.6 times of that under non-inducing conditions, twice of that induced in Sakai (32.7 times) and 15 times higher than that induced in EDL933 (4.5 times). Our study shows that ST96 is a novel clone and provided significant new insights into the evolution of virulence of E. coli O157:H7.

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  • Posted: April 30th, 2012 - 11:43am by Ben Chapman

    Author: 
    Ben Chapman

    According to the Buncombe County Department of Health an additional five illnesses have been added to a cluster of illnesses linked to travel to Buncombe Co (and eating or drinking something there?).

    The Buncombe County Department of Health reports that 5 more cases of Salmonella Paratyphi B were identified over the weekend, bringing the total to 34, as of Monday, April 30, 2012. The local health department is working with NC Department of Public Health, Center for Disease Control, US Department of Agriculture and others to continue intensive testing, interviewing, and epidemiological investigation of the outbreak in order to squelch the spread of the disease. Cases still appear to have been associated with residence or travel to Buncombe County since February 28, 2012. A single source of infection has not been confirmed.

    WYFF4 reports that Buncombe County Health Director Gibbie Harris said there have also been cases confirmed in other parts of North Carolina, South Carolina, Tennessee and New York.

    "None of us think that we've seen the peak of this yet," said Harris. "This (strain) has a longer incubation period, so you can go up to 30 days after being exposed before you actually show symptoms."

    Harris said this particular strain is also different than the strain of salmonella usually seen because it's treated with an antibiotic and causes more severe symptoms.
     

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  • Posted: April 30th, 2012 - 11:09am by Doug Powell

    On March 23, 2010, the national food surveillance system in Denmark reported a steady occurrence of positive isolates of S. Typhimurium, of unknown phage type and resistant to ampicillin, streptomycin and sulphamethoxazole, in samples from mainly pork meat and products.

    Researchers from Denmark and Sweden report in Epidemiology and Infection that several isolates originated from a specific pig slaughterhouse A or a closely associated cutting plant. At this point, although no human cases had yet been identified, an investigation was initiated with the focus on food contamination. On 20 April, a total of 14 human cases with the outbreak type had been confirmed.

    A case-control study was undertaken to confirm an association between illness in a subgroup of patients and consumption of teewurst or tea sausage, a spreadable sausage made from fresh salted and smoked pork and beef which is fermented but not heat-treated. The producer of the teewurst had received pork from slaughterhouse A during the period that the outbreak strain had been isolated.

    Herds delivering pigs to slaughterhouse A were identified by a unique herd identification number given to all animal herds in Denmark.

    From March 2010 and onwards, the outbreak strain was identified in a total of 113 samples; four environmental samples from slaughterhouse A and 109 meat
    samples, mainly pork, of which 96 were sampled directly at slaughterhouse A or could be traced back there. Positive meat types included mainly minced pork, pork belly, pork loin and loin back ribs.

    Investigation of slaughterhouse A showed positive discovery of the outbreak strain in swabs from equipment and meat samples, even after closing down production for thorough cleaning and disinfection. It was concluded that the establishment was most likely contaminated. Repeated cleaning and disinfection was performed and alterations in equipment and procedures were implemented, From the beginning of July, no further positive samples of the outbreak strain were found at slaughterhouse A.

    On 8 July, a press statement was issued jointly by the DVFA and SSI, notifying the public about the salmonellosis outbreak and the link to consumption of pork meat from slaughterhouse A. In addition to describing the outbreak investigation and the action taken to control the outbreak, the statement also contained detailed guidelines on how to prevent infection with Salmonella.

    A total of 172 cases of S. Typhimurium U323 were reported between March and September 2010 in Denmark demonstrating how a combination of typing Salmonella isolates from farm-to-fork and from the human population can provide early warning of a salmonellosis outbreak. It also highlights the importance of national Salmonella surveillance which allowed identification of the slaughterhouse contamination and provided the COMG with valuable information to initiate investigative measures. In spite of the existence of these systems, tracing pork meat that has entered the production chain still poses a significant challenge. If feasible, adoption of a standardized automated system across the EU, with detailed product and distribution information, for tracing products might prove worthwhile.

    Currently, this is not possible in the EU and such systems are only as good as the data provided by the operators. At present, by the time enough evidence has been gathered to issue a product recall, products with a short shelf-life (such as fresh meat) are most likely to have been consumed.

    In this outbreak, early warnings from the Salmonella surveillance system were not sufficient to prevent the outbreak from lasting almost 7 months.

    State-of-the-art surveillance, typing, epidemiology and food traceback allowed us to firmly establish the source of the outbreak and, in essence, solve it almost before it became evident; however, legislative measures and some delays in traceback did not allow for sufficient control, resulting in one of the longest lasting Salmonella outbreaks in Denmark.

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  • Posted: April 30th, 2012 - 12:17am by Doug Powell

    PC may be politically correct, but in jail it means protective custody, not much better than the hole.

    Two days after the Canadian Food Inspection Agency confirmed scrapie in a recently deceased sheep from a quarantined flock in Eastern Ontario, and a month after CFIA was scheduled to confiscate the Shropshire sheep, the previously unknown group Farmers' Peace Corps kidnapped the 31 sheep slated for slaughter, leaving a note that read:

    “We have taken the animals into protective custody until an alternative to killing has been found, or conclusive independent proof or clear evidence of disease has been proven. This has been done without the knowledge or participation of the owner.”

    What say the people’s front now that scrapie has been confirmed? Not independent? Testing for scrapie or other transmissible spongiform encephalopathies isn’t something that can be done in a basement, like genetic engineering.

    The Globe and Mail reports that on Friday, CFIA notified Ms. Jones that an autopsy showed a sheep that died at the end of March on the farm was infected with scrapie.

    Montana Jones, the owner, said, “I don’t believe Lava (the name of the sheep) was actually infected. They just needed a sheep to pin it on. I just want whoever has my flock to bring it back to me and then everybody leave me alone.”

    CFIA said in its positive test announcement that Canada’s approach to confirmed or suspected cases of scrapie is based on internationally accepted science and seeks to minimize disruptions to producers.

    The missing sheep pose a serious risk for scrapie and could spread the disease to other sheep and goats. Any premises that receive them will be subject to a quarantine and further regulatory action.

    Quarantine breaches put the livestock industry and the economy at risk. Any person who breaches a quarantine may be subject to criminal prosecution under the Health of Animals Act.

     

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  • Posted: April 29th, 2012 - 12:00am by Doug Powell

    The good things about food, safely prepared, from my kitchen.

    Whole beef eye fillet for two, from the extra-super clearance cheap meat section of the supermarket, with an olive oil-mustard-garlic-lime-rosemary crust, pan-seared, then slow roasted in the oven to 130F and served with a red wine beef jus, with roasted potatoes, mushrooms, leeks and asparagus, whole wheat bread (they call it whole meal here), and Saucer scallops from the waters off the Queensland coast.

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  • Posted: April 27th, 2012 - 3:47pm by Doug Powell

    tony-soprano.jpg

    What shall we have for dinner? Chinese? Indian? Italian? Researchers at the UK’s Health Protection Agency went through available data and found some food-type-pathogen-matches that statistically stood out. Abstract below.

    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 SalmonellaEnteritidis 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.

    Epidemiology and Infection June 2012 140 : pp 997-1007
    F. J. Gormley, N. Rawal and C. L. Little

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  • Posted: April 27th, 2012 - 2:14pm by Doug Powell

     A new New York pizzeria, Don Antonio, has already been shuttered by the Dept. of Health.

    Eater reports a tipster spotted the yellow sign on the door yesterday, and when an Eater operative went by to snap a pic of the exterior, the management freaked out and said they'd call the cops.

    The information from yesterday's inspection isn't up on the DOH site yet, but in March, an inspector found 22 violation points (enough for a B-Grade), including two critical violations: cold food held above 41º F, and evidence of mice or vermin. Don Antonio currently does not have a letter grade.

    An employee at the restaurant said they hoped to get the restaurant open by tomorrow or Friday.

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  • Posted: April 27th, 2012 - 2:12pm by Ben Chapman

    Author: 
    Ben Chapman

    There's a salmonellosis outbreak going on in western North Carolina. According to WYFF4.com, 27 individuals are part of a cluster of illnesses linked to Salmonella Paratyphi B infections.

    Communicable Disease Nurses and Environmental Health Specialists are conducting interviews with people who currently have or have had the infection, reviewing laboratory reports and inspecting food sources that may be linked to the outbreak.Communicable disease experts from the North Carolina Division of Public Health and the Centers for Disease Control and Prevention as well as food specialists from the N.C. Department of Agriculture are assisting with the investigations.

    As of Friday morning, 27 possible cases have been identified.  The source of contamination had not been confirmed.

    All cases appear to have been associated with residence or travel to Buncombe County since Feb. 28, 2012.

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  • Posted: April 27th, 2012 - 7:09am by Doug Powell

    Health officials are investigating the cause of what sickened 27 people following a luncheon this week for the Pueblo Community Health Center.

    "It's too early to implicate the caterer. We're only a day into it and we have 27 people sick out of 80," Dr. Chris Nevin-Woods said Thursday.

    "The symptoms are fitting of a number of possibilities, but it could be something other than food," Nevin-Woods said. One possibility could be norovirus.

    Janet Fieldman, the health center's chief foundation officer, sent an email Thursday to those who attended the dinner, alerting them to the outbreak and telling them they would be contacted by health officials.

    The email was sent to several elected officials at the city and county levels, college leaders, doctors and members of the medical community.

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  • Posted: April 27th, 2012 - 3:50am by Doug Powell

    KFC has been ordered to pay $8 million damages by a judge who found a young Sydney girl was left severely brain damaged after eating a Twister chicken wrap.

    AAP reports the family of Monika Samaan (right) successfully sued the fast food giant, claiming the source of her salmonella poisoning was a Twister.

    Her father told the NSW Supreme Court he bought the wrap on October 24, 2005, at the KFC outlet at Villawood, in Sydney's west.

    While Monika, her parents and her brother ended up in hospital with salmonella poisoning, the then seven-year-old was left severely brain damaged and is effectively now a quadriplegic.

    On Friday, Justice Stephen Rothman ordered KFC to pay $8 million damages plus legal costs.

    Last Friday, he found KFC had breached its duty of care to the young girl.
    KFC has indicated it will appeal his finding.

    In a statement, the family's lawyer George Vlahakis said, "The compensation ordered is very much needed. KFC have to date been determined that Monika does not receive a cent."

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  • Posted: April 26th, 2012 - 11:10pm by Doug Powell

    A 38-year-old Las Vegas man was sentenced Thursday to two years in federal prison after admitting that he tried to smuggle 159 pounds of iguana meat from Mexico into the U.S.

    The Los Angeles Times reports Eliodoro Soria Fonseca admitted in San Diego federal court that he intentionally concealed the iguana meat inside several coolers because he lacked the necessary import permits from the U.S. or Mexican governments. The meat was to be sold for human consumption, prosecutors said.

    Iguana meat often carries salmonella, officials said. Fonseca was arrested attempting to cross the border at Otay Mesa on June 10, 2011.

    The iguanas had been beheaded, skinned and deboned and hidden under several pounds of fish, according to court documents.

    Importation of iguana meat is permitted but only under restrictions meant to keep from depleting certain populations of the lizard. The iguana is listed as imperiled but not yet endangered, according to the U.S. Fish and Wildlife Service.

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  • Posted: April 26th, 2012 - 5:00pm by Ben Chapman

    Author: 
    Ben Chapman

    North Carolina is set to adopt the FDA Model Food Code by reference, with a couple of state-specific adjustments, starting with the 2009 iteration. This means the Food Code becomes the law that commercial food service businesses will be required to follow. According to the code, commercial buyers of cut leafy greens should receive them at 41F (5C) or below. This requirement is to curb the growth of pathogens. Based on past outbreaks, the two pathogens of most concern are shiga-toxin producing E. coli and Salmonella spp. There is lots of debate around the validity of the guidance, as well as the economic impact the cooling requirement might have on producers marketing salad ingredients.

    Cut leafy greens (as defined by the U.S. Food and Drug Administration) are fresh leafy greens whose leaves have been cut, shredded, sliced, chopped, or torn --beyond a root zone cut or harvest cut. The term leafy greens includes iceberg lettuce, romaine lettuce, leaf lettuce, butter lettuce, baby leaf lettuce (i.e., immature lettuce or leafy greens), escarole, endive, spring mix, spinach, cabbage, kale, arugula and chard. The term leafy greens does not include herbs such as cilantro or parsley (see here).

    Cut leafy greens have not always required temperature control for safety. Following over 20 multi-state outbreaks between 1998 and 2008, 'cut leafy greens' was added to the definition of potentially hazardous food requiring time-temperature control for safety (TCS).

    Storage and transport time and temperature are contributing factors for pathogen growth in cut leafy greens; water and nutrient availability, along with a suitable pH create an environment to support the growth of lots of food borne bacteria

    Luo and colleagues (2010) demonstrated one log growth over a 4-day period after inoculating cut lettuce with E. coli O157:H7 at 53.6F (12C). Luo and colleagues also showed that if stored at 41F (5C), E. coli O157:H7 populations do not grow and experience slight decline. Lee and Baek (2008) showed that spinach inoculated with E. coli O157:H7 and stored at 44.6F (7C) would support pathogen growth This finding, coupled with other data, was modeled by Danyluk and Schaffner (2011) and supports assumptions that cut leafy greens that are temperature abused will support the growth of E. coli O157:H7 and that the pathogen’s populations may increase by as much as ten-fold each day (at optimum temperatures). Pathogens, once attached to the surface or internalized into cut surfaces of leafy greens, are only marginally affected by sanitizers (their use is not considered an adequate control strategy for the pathogens) leaving time/temperature as the most effective control.

    While adoption of the FDA Model Food Code has brought attention to a potential barrier, the process of taking a raw agriculture product and turning it into a cut leafy green (for example heads of iceberg lettuce being shredded and sold in a package/box to retail) already requires refrigeration in post-processing and storage by FDA's CFR 21 110.80 (as it's applied in North Carolina).

    While folks might argue the validity of the 41F or lower requirement for cut leafy greens, producers who are marketing cut leafy greens should focus on risk reduction through refrigeration (at of below 41F) in storage and transport regardless of the law (which also likely provides a higher quality product). Or harvest, cut and transport to a restaurant quickly, where time in lieu of temperature would be a valid control measure.

    Maintaining temperatures below 41F for fresh-cut leafy greens has been raised as a practical and economic barrier for producers (as it is suggested that processors of these products do not typically have the means to control temperatures post-processing and during transport). There isn't a whole lot of data available to support or refute this - so we're going to generate some by quickly evaluating regular food coolers and ice/icepacks as a potential way for a producer to get the product to a buyer at 41F.

    References:

    Danyluk, M and Schaffner, D. 2011.  Quantitative assessment of the microbial risk of leafy greens from farm to consumption: Preliminary framework, data, and risk estimates. J. Food Prot. 74:700–708.

    Lee, S. Y., and Baek, S. 2008. Effect of chemical sanitizer combined with modified atmosphere packaging on inhibiting Escherichia coli O157:H7 in commercial spinach. Food Microbiol. 25:582–587.

    Luo, Y., He, Q., and McEvoy, J. 2010. Effect of storage temperature and duration on the behavior of Escherichia coli O157:H7 on packaged fresh-cut salad containing romaine and iceberg lettuce. J. Food Sci. 75:M390-M397.

     

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  • Posted: April 26th, 2012 - 4:08pm by Doug Powell

    The U.S. Centers for Disease Control reports that based on an epidemiological link and results of laboratory testing, CDC has combined the Salmonella Bareilly investigation with an ongoing multistate outbreak investigation of Salmonella serotype Nchanga infections. The two associated PFGE patterns have been grouped together as the outbreak strains.

    A total of 200 persons infected with the outbreak strains of Salmonella Bareilly or Salmonella Nchanga have been reported from 21 states and the District of Columbia.

     

    190 persons infected with the outbreak strain of Salmonella  Bareilly have been reported from 21 states and the District of Columbia.

     

    10 persons infected with the outbreak strain of Salmonella Nchanga have been reported from 5 states.

     

    28 ill persons have been hospitalized, and no deaths have been reported.

     

    Collaborative investigation efforts of state, local, and federal public health agencies indicate that a frozen raw yellowfin tuna product, known as Nakaochi Scrape, from Moon Marine USA Corporation is the likely source of this outbreak.

     

    Testing conducted by the Wisconsin Department of Agriculture Trade and Consumer Protection laboratory isolated the outbreak strain of Salmonella Bareilly from one sample of recalled tuna and one sample of a spicy tuna roll made with recalled tuna.

     

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  • Posted: April 26th, 2012 - 3:13pm by Doug Powell

    A Las Vegas local restaurant owner is angry with the Southern Nevada Health District. And he's speaking out after his restaurant was shut down.

    "You have no reason to go shut it down, Gabriel Adefris told KTNV. "And you think this list is basically nothing?" asks Darcy. "Nothing. For me nothing, yes," says Gabriel.

    He firmly believes his business has been treated unfairly. Gabriel owns the Cottage Cafe on Paradise Road, near Tropicana Avenue. During a recent visit, health inspectors shut down the Ethiopian restaurant with 49 demerits. Anything more than 40 means an automatic closure.

    Contact 13 went to the Cottage Cafe to ask about the long list of violations. Gabriel was more than willing to show us around and answer all of our questions.

    "What's the deal with the bar? It notes that they told you on December 8 and January 17 to get it permitted. But you failed to do that," says Darcy. "No. I did call them," says Gabriel.

    Gabriel claims he tried to make appointments to get his bar inspected. But after leaving multiple messages, he says they never returned his calls.

    "So there's no way I could force them to come down here, it's not my job," says Gabriel.

    I also asked Gabriel about an employee, inspectors say washed her hands without soap, multiple times.

    "That's not true. She washed it, she used soaps all the time here. Nobody use without soap water, there's no way," says Gabriel. "So you think the health inspector is lying?" asks Darcy. "Yes, they're lying. They lie. 100%, they're lying," says Gabriel.

    And he didn't stop there. He says health inspectors are too critical. Like citing his restaurant for a dirty can opener he claims was being used by an employee.

    "They shouldn't write it down. Small stuff like that you write it down. Once she's done she's got to go and wash it anyways. Right?" says Gabriel. "So she just hadn't gotten to that can opener yet," says Darcy. "Yes. They didn't even give her time," says Gabriel.

    But Cottage Cafe has made our Dirty Dining list before. In September of 2010, the restaurant was forced to close its doors with 58 demerits.

    Gabriel feels like he's being targeted

    "So you believe they're looking for violations and writing down stuff that doesn't exist just to bilk you for money?" asks Darcy. "That's what I think. Because my employees they know what to do. They know their job," says Gabriel.

    Gabriel wants customers to know his restaurant is clean and his food is safe.

    We spoke with the Health District, which says all restaurants must pass the same regulations. Every inspector's main priority is the public's health and safety and they stand by their report. They also tell us the Cottage Cafe is back open, and operating with a 7 demerit A grade.

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  • Posted: April 26th, 2012 - 1:45pm by Doug Powell

    itv News reports four more people have been diagnosed with cryptosporidiosis linked to the outbreak at Greenmeadow Community farm in Cwmbran, Wales.

    It brings the total number of cases to eight. All were either members of staff or volunteers who bottle fed unwell animals. The animals have now been removed from the farm.

    Public Health Wales say extra control measures are in place to ensure that risks to farm visitors and staff are kept to a minimum.

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  • Posted: April 25th, 2012 - 3:54pm by Ben Chapman

    Author: 
    Ben Chapman

    I received a bunch of my food safety education while working with fruit and vegetable farmers in southern Ontario (that's in Canada). Sure, I learned lots of stuff in classes, but a lot of my training on practical ways to keep folks from barfing was in greenhouses, fields and orchards. Farmers deal with variability in weather, wildlife, prices and staff. Driving up and down dirt roads and walking through their systems led me to the conclusion that it takes a lot to surprise a producer.

    One farmer who figured his staff were one of his biggest weaknesses, invested in a couple of portable restrooms that he was going to cart around to the orchards. He told his staff that they were expected to cease the convention of peeing against a tree. The staff didn't like the idea of having to stop and walk back to the road where the porta potties were located. So they set them on fire and burned them down. The producer said calling the fire department was an unexpected outcome of his food safety program.

    Another producer told me that he had installed fully stocked hands free restrooms in his greenhouse, put boxes of one-use gloves throughout his site and came in one day to see a staff member urinating on the outside of the restroom with his gloves on. Maybe not surprising is that he fired the employee on the spot.

    Giving folks tools for risk reduction doesn't always end up with the intended action. According to AP and USA Today teenagers are buying alcohol-based hand sanitizer, not as a bacterial reduction tool, but as a party drink precursor.

    Teenagers are showing up in Los Angeles emergency rooms after drinking inexpensive liquid hand sanitizers to get drunk.
    Cheap and easily accessible hand sanitizers contain 62 percent ethyl alcohol.

    The Los Angeles Times says six teenagers have shown up in two San Fernando Valley emergency rooms in the last few months with alcohol poisoning after drinking hand sanitizer.

    Some of the teens used salt to separate the alcohol from the sanitizer, making a potent drink similar to a shot of hard liquor. Distillation instructions can be found on the Internet.

    Although there's only been a few cases, county public health toxicology expert Cyrus Rangan says it could signal a dangerous trend.

     

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