Wyoming researchers discover substance that increases Listeria monocytogenes survival

University of Wyoming researchers have discovered a substance that greatly increases the survival of Listeria monocytogenes, a foodborne bacterial pathogen that contaminates processed meat and milk products, as well as fresh produce.

listeriaResearchers hope the discovery will lead to the development of techniques to better combat the pathogen and to improve food safety.

Mark Gomelsky, a professor in UW’s Department of Molecular Biology, and other researchers discovered and characterized a substance, called exopolysaccharide (EPS), that Listeria secretes on its cell surface under certain conditions. The EPS coats bacterial cells and makes them form aggregates or clumps, which are strongly protected from commonly used disinfectants and desiccation (extreme drying).

“We think that EPS plays a significant role in survival of Listeria in the environment, during food storage, processing and transportation,” Gomelsky says. “Listeria rarely causes serious disease in healthy individuals but, in immune-compromised people, elderly and pregnant women, it can be deadly, causing as much as 20 percent to 25 percent mortality.”

Gomelsky is a senior writer of a paper, titled “Cyclic di-GMP-Dependent Signaling Pathways in the Pathogenic Firmicute Listeria monocytogenes,” that was published in Public Library of Science (PLoS) Pathogens Thursday.

63 in Europe sickened; Salmonella in watermelon from Brazil, 2011

In November 2011, the presence of Salmonella Newport in a ready-to-eat watermelon slice was confirmed as part of a local food survey in England. In late December 2011, cases of S. Newport were reported in England, Wales, Northern Ireland, Scotland, Ireland and Germany. During the outbreak, 63 confirmed cases of S. Newport were reported across all six countries with isolates indistinguishable by pulsed-field gel electrophoresis from the watermelon isolate.

Watermelon_Rind_Copyright_2009_Watermelon_RindA subset of outbreak isolates were whole-genome sequenced and were identical to, or one single nucleotide polymorphism different from the watermelon isolate. In total, 46 confirmed cases were interviewed of which 27 reported watermelon consumption. Further investigations confirmed the outbreak was linked to the consumption of watermelon imported from Brazil. Although numerous Salmonella outbreaks associated with melons have been reported in the United States and elsewhere, this is the first of its kind in Europe. Expansion of the melon import market from Brazil represents a potential threat for future outbreaks. Whole genome sequencing is rapidly becoming more accessible and can provide a compelling level of evidence of linkage between human cases and sources of infection, to support public health interventions in global food markets.

A Multi-country Outbreak of Salmonella Newport Gastroenteritis in Europe Associated with Watermelon from Brazil, Confirmed by Whole Genome Sequencing: October 2011 to January 2012

Eurosurveillance, Volume 19, Issue 31, 07 August 2014

L Byrne, I Fisher1, T Peters, A Mather, N Thomson, B Rosner, H Bernard, P McKeown, M Cormican, J Cowden, V Aiyedun, C Lane

http://www.eurosurveillance.org/ViewArticle.aspx?ArticleId=20866

Cryptosporidium confirmed at Florida water park

The Pinellas County Department of Health has notified the City of Tarpon Springs that they have received three confirmed cases of cryptosporidium in which the patients had been at the Tarpon Springs Splash Park during the incubation period.

doug.ben_.family-300x225All three patients attended the park during the fourth week of July.

The City completely replaced and treated the water and all associated water systems at the Splash Park on Aug. 1. In an abundance of caution, the park will be closed Thursday and Friday while this process is repeated.

The City says it anticipates the park will reopen on Saturday, Aug. 9 at 10 a.m.

Snake oil: Whole Foods Market still peddling hucksterism

There is no definition for natural foods in the U.S. Yet, Whole Foods applies the label to so many products, it is close to meaningless. 60-60168_MECHAlan McHughen, a botanist at the University of California, Riverside, told The Economist that the whole industry is “99% marketing and public perception,” reeling people in through a fabricated concept of a time when food, and life in general, was simple and wholesome. They used to be called snake oil sale thingies. Why not brag about excellent microbial food safety standards instead, you know, the things that make 48 million Americans sick every year, rather than pseudoscience?

Pork neck slices tested positive for Listeria in Macedonia

Sample of smoked pork neck slices produced by Kumanovo company with the name of “Extra Mein” has been tested positive forLlisteria bacteria, Macedonia’s Commission for Infectious Diseases of Macedonian Ministry of Health released on Wednesday.

EkstraMein1This listeria bacteria found in the Kumanovo company’s product is 98 percent match with the bacteria genotype of those infected eight patients in Macedonia, four of whom have been taken life.

Steps forward for locating the source of the disease will be taken and epidemiological tests will be made by professional institutions, said Zvonko Milenkovic, chair of the Commission for Infectious Diseases of Macedonian Ministry of Health.

Traces of Norovirus found in Finish patients’ tests

The first laboratory tests of fecal samples from individuals who went swimming around Tampere have yielded signs that the virus remains present in local waterways.  

norovirus-2Patient specimens were obtained from a total of 18 people, 15 of whose tests showed positive for the virus.

Tampere city’s Environmental Health Director Merja Bojang says that this indicates that the norovirus has spread though bathers from one beach to another.

Tampere City authorities want to identify the causes and consequences of the epidemic, which causes an upset stomach. The city website now hosts an online form inviting feedback from visitors to Tampere beaches between July 21 and August 6 – both those who remained healthy and those who fell ill.

They also hope to hear back from respondents who have earlier used the form or the telephone service to log details of their illness. It’s hoped that each individual would fill out their own form.

The electronic questionnaire can be answered until Friday, August 22.

FDA agent: Peanut plant ‘not fit’ to produce food

So why was this only discovered after the outbreak that killed nine and sickened 700 with Salmonella?

peanutA federal food safety inspector who investigated a deadly Salmonella outbreak linked to a Georgia peanut plant says the company was “not fit to produce products for human consumption.”

Janet Gray of the Food and Drug Administration testified Wednesday in the federal trial of three people charged with covering up contamination at the Peanut Corp. of America plant, and knowingly shipping infected nuts to customers.

Gray described company records for the jury that showed at least eight times when nuts were shipped after testing positive for Salmonella. And she said equipment at the plant wasn’t cleaned even after the Salmonella showed up.

Two Ohioans hospitalized with botulism

Almost always resulting in some form of paralysis (and then hospitalization), botulism is one of the scariest foodborne illnesses out there. It’s why I’m super careful with the canning I do at home and pay attention to storage of low-acid foods.

Last week a recall alert alluded to 2 cases of botulism in Ohio linked to VR Farms jarred pesto.

According to Fox 19, the victims are in Cincinnati and were both hospitalized.

Two Cincinnati residents have been hospitalized with botulism after a nationwide recall of California sauces.

Steven Englender, director of the Center for Public Health Preparedness in the Cincinnati Health Department, said they have found presumptive laboratory evidence of type B botulism and confirmed two clinical cases of botulism.newpesto72_large-229x300

Englender said in an email to city spokesman Rocky Merz Monday that the patients, both in their 20s, were improving. One patient was on a ventilator and had been transferred to an acute long-term care facility. The other patient was off assisted breathing. That patient may have since been discharged.

The Cincinnati Health Department says a pesto sauce seems to be the cause in both cases.

Pittsburgh restaurant fined for obscuring inspection placard

A couple of years ago a colleague at the vet college shared a story with me about restaurant grades. He and his son went into a local sushi place and it was dead – they had no problem getting a seat during the usually busy lunch rush. He asked the manager what was up and she said that business had been down since they had been given a low score during a routine inspection. That made my friend pause a bit; they still ordered lunch and ate, but hadn’t been back.

I guess some folks do make choices based on posted restaurant grades.Chinatown-Inn-consumer-alert

And that’s why some restaurants do their best to hide a placard with a poor score. According to the the Pittsburgh Post-Gazette hiding a score with cost you $800.

It’s easy to understand why the owner of Chinatown Inn might be embarrassed by the yellow Consumer Alert decal that was prominently posted on the front window of his Downtown restaurant in late July for a string of serious food safety violations.

But an effort to hide the warning from customers behind two strategically placed potted plants backfired when the Allegheny County Health Department discovered the cover-up and slapped him with an $800 fine.

The next day, a Friday, an off-duty health department inspector who had issued the alert was passing through the area around 9:30 p.m. and noticed the warning was being blocked by a large potted palm plant positioned outside on the sidewalk. Another potted palm in the vestibule was pushed against the window, obscuring the alert from the inside.

The inspector snapped a photo to document the scene.

During a follow-up visit on Monday, the inspector replaced the yellow alert sticker with a green “inspected and permitted” placard after finding that most of the serious violations had been fixed. In his report, he noted that the alert had been concealed. A few days later, a fine was issued.

Here are a few more of my favorites.

deceptive-restaurant-sign

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a-harlem-restaurant-craftily-hid-its-bad-health-inspection-grade

Pay attention, be the goalie: Texas A&M Center for Food Safety

I have a drill I do weekly with the goalies at hockey practice.

I’ll have three of them, each in front of a net, and I tell them, pay attention, you never know where I’m going to shoot the puck (neither do I, but I’m a goalie).

powell_soli_AUG2Their job is to know where the puck is and predict where it’s going to be so they can better position themselves. I can look one way but shoot another. The goalie is the last line of defense when others mess up.

Much of food safety is, pay attention – especially to the checks that are supposed to reduce risk.

In 2009, the operator of a yakiniku barbecue restaurant chain linked to four deaths and 70 illnesses from E. coli O111 in raw beef in Japan admitted it had not tested raw meat served at its outlets for bacteria, as required by the health ministry.

“We’d never had a positive result [from a bacteria test], not once. So we assumed our meat would always be bacteria-free.”

That’s like telling goalies, unless the shooter is staring at you, the puck will stay out of the net.

Those who study engineering failures –the BP oil well in the Gulf, the space shuttle Challenger, Bhopal – say the same thing: human behavior can mess things up.

In most cases, an attitude prevails that is, “things didn’t go bad yesterday, so the chances are, things won’t go bad today.”

Jacques-PlanteAnd those in charge begin to ignore the safety systems.

Beginning August 2, 1998, over 80 Americans fell ill, 15 were killed, and at least six women miscarried due to listerosis. On Dec. 19, 1998, the outbreak strain was found in an open package of hot dogs partially consumed by a victim. The manufacturer of the hot dogs, Sara Lee subsidiary Bil Mar Foods, Inc., quickly issued a recall of what would become 35 million pounds of hot dogs and other packaged meats produced at the company’s only plant in Michigan. By Christmas, testing of unopened packages of hot dogs from Bil Mar detected the same genetically unique L. monocytegenes bacteria, and production at the plant was halted.

A decade later, the deaths of two Toronto nursing home residents in the summer of 2008 were attributed to listeriosis infections. These illnesses eventually prompted an August 17, 2008 advisory to consumers by the Canadian Food Inspection Agency (CFIA) and Maple Leaf Foods, Inc. to avoid serving or consuming certain brands of deli meat as the products could be contaminated with L. monocytogenes. When genetic testing determined a match between contaminated meat products and listeriosis patients, all products manufactured at a Toronto Maple Leaf Foods plant were recalled and the facility closed. An investigation by the company determined that organic material trapped deep inside the plant’s meat slicing equipment harbored L. monocytogenes, despite routine sanitization that met specifications of the equipment manufacturer. In total, 57 cases of listeriosis as well as 22 deaths were definitively connected to the consumption of the plant’s contaminated deli meats.

esposito_tony_8x10In both Listeria cases, the companies had data that showed an increase in Listeria-positive samples.

Pay attention.

One Canadian academic dean-thingy said the 2008 Listeria outbreak was a real eye-opener.

This person should not be in charge of anything to do with microbial food safety.

Food safety culture has been talked about a lot, but it seems so much talk and not so much data.

Food producers should truthfully market their microbial food safety programs, coupled with behavioral-based food safety systems that foster a positive food safety culture from farm-to-fork. The best producers and processors will go far beyond the lowest common denominator of government and should be rewarded in the marketplace.

They should pay attention.

Kellogg’s was taking Salmonella-contaminated peanut paste based on paperwork? Pay attention.

Nestle did.

Australians are so laid back, or so I’m told, they don’t bother to look both ways when driving. Stop signs seem optional.

courtlynn.hockeySo I’m always telling my younger and older kids (when they visit) you have to pay attention, because that car will not stop for you.

I coach hockey in Australia, where 5-year-olds and 10-year-olds are on the ice at the same time, and I say, pay attention. Because that 10-year-old can wipe you out.

Just like some unexpected bug.

Dr. Douglas Powell is a former professor of food safety who shops, cooks and ferments from his home in Brisbane, Australia.