April 18, 2014

CDC: Tests Show Listeria Match to Roos Cheese

Listeriosis Outbreak 2.22.14

Whole-genome sequencing (WGS) tests show Listeria strains found in Roos cheese are highly related to those isolated from ill patients, according to an update from the Centers for Disease Control and Prevention (CDC). The results add "further confidence that cheese products produced by Roos Foods were a likely source of the outbreak," says the CDC. Normally, a process called pulsed-field gel electrophoresis (PFGE) is used to match outbreak isolates, but WGS provides an even clearer distinction of isolates, according to the CDC. The WGS was performed by the Food and Drug Administration (FDA) and Virginia’s Division of Consolidated Laboratory Services as part of a Listeria WGS initiative that is a collaboration between the CDC, FDA, the U.S. Department of Agriculture, the National Center … [Read more...]

Roos Cheese Recalled After It’s Linked To Listeria Outbreak

Roos cheese recalled after it is linked to deadly Listeria outbreak.

Roos Foods of Kenton, DE  has issued a recall for several cheeses that may be contaminated with Listeria monocytogenes. The February 23 recall comes two days after the Centers for Disease Control and Prevention (CDC) announced a Listeria outbreak associated with the cheese that killed one person in California and sickened seven others n Maryland. All lots of the following cheese are being recalled: Cuajada En Terron, Cuajada/Cuajadita Cacera, Cuajada Fresca, Queso Fresca Round and Queso Dura Viejo Hard Cheeses sold under the brand names Amigo, Mexicana, Santa Rosa De Lima, and Queso Fresco sold under the Anita brand name. The recalled products were packaged in flexible plastic bags and rigid plastic clam shell packages in 12 oz. and 16 oz. sizes and sold at retail stores including … [Read more...]

Maryland Issues Listeria Warning About Roos Cheeses


The Maryland Department of Health and Mental Hygiene is warning consumers not to eat cheeses made by Roos Foods due to possible Listeria contamination. Roos Foods of Kenton, Delaware makes the following brands: Santa Rosa de Lima, Amigo, Mexicana, Suyapa, La Chapina, and La Purisima Crema Nica. Consumers who have purchased these cheeses should not eat them as Listeria can cause serious illness. Listeria bacteria can cause an infection called listeriosis. Symptoms can appear as early as three days after exposure or take as long as 10 weeks. They include: nausea, diarrhea, fever, muscle aches, headache, stiff neck, confusion, loss of balance, and convulsions. Listeriosis is especially dangerous for  pregnant women. It can cause miscarriages and stillbirths although the pregnant women … [Read more...]

Cantaloupe Farmers Avoid Prison After Deadly Listeria Outbreak

Jensen brothers are sentenced

Ryan and Eric Jensen, whose farm produced cantaloupe contaminated with Listeria that killed 35 people and sickened more than 100 others, will not serve prison time or be forced to pay a $1.5 million, a federal judge in Denver has ruled. The brothers, who apologized in court,  were sentenced to five years of probation, six months of house arrest and fined $150,000 each. In October, the brothers pleaded guilty to six misdemeanor counts of introducing adulterated food into the marketplace. The 2011 cantaloupe Listeria outbreak linked to their farm was one of the deadliest in U.S. history. In addition to the 35 deaths, seven pregnant women were infected. One of them suffered a miscarriage and three babies were born with listeriosis. The outbreak began in mid-August of 2011 and spread … [Read more...]

Listeria Found in Raw Milk Sold in Brookings, SD

Listeria in raw milk

Listeria has been found in a sampling of  raw milk from Jerseydale Farms near Brookings, S.D., according to the South Dakota Department of Agriculture (SDDA).  The agency is warning consumers  to discard raw milk recently purchased from this farm as it could contain Listeria, a bacteria that causes serious, sometimes life-threatening illness.  Those most at risk for Listeria infection, called listeriosis, are pregnant women, young children, seniors and individuals with weakened immune systems. Listeriosis can cause miscarriages and stillbirths among pregnant women. A person with listeriosis may have a headache, stiff neck, fever, muscle aches and sometimes nausea or diarrhea. Confusion, loss of balance or convulsions can also occur. Rules governing the sale of raw milk vary from … [Read more...]

Largest Multi-State Food Poisoning Outbreaks of 2013: #11

Crave Brother Cheese Recall and Outbreak

A Listeria outbreak linked to Crave Brothers Farmstead Cheese was the eleventh-largest multi-state food poisoning outbreak of 2013. It was also one of the two multi-state outbreaks of 2013 that included a fatality. Six people contracted listeriosis after eating the cheese, all of them were hospitalized. One person died, and one woman suffered a miscarriage. The Centers for Disease Control and Prevention (CDC) announced the outbreak on July 3. Initial onset of illness dates ranged from May 20 to June 17. By state, the case count was as follows: Illinois (1), Indiana (1), Minnesota (2), Ohio (1), and Texas (1). The fatality occurred in Minnesota. Local, state and federal public health investigators, including officials from the CDC and the U.S. Food and Drug Administration (FDA), … [Read more...]

Gut Microbes Affect Infection Response to Listeria


The army of microbes that resides in the human gut may provide a powerful defense against Listeria infection, according to a study published in mBio, the online open-access journal of the American Society for Microbiology. The study, by a team of French researchers, shows that mice with germ-free intestines are more susceptible to Listeria infection than mice with the conventional intestinal microbes. Twenty four hours after infection, the number of Listeria in the intestines of the germ-free mice was 10,000 times greater than the number found in the small intestines of mice with conventional microbes;  and about 1,000 times higher in the mesenteric lymph nodes of germ-free mice than it was in conventional mice. Researchers think the response may be similar in humans. Foods … [Read more...]

CDC Study: A Decade With No Progress in Reducing Listeriosis

Soft cheeses are a high risk food for Listeria

It's been more than a decade since the U.S. has made progress in reducing the incidence of listeriosis, according to a recent study by the Centers for Disease Control and Prevention (CDC). For the past decade, listeriosis rates in the U.S. have remained fairly constant at about 800 cases annually. In the late 1990s and early 2000s, outbreaks linked to Listeria in hot dogs and deli meat prompted industry and regulatory reforms that required the use of ingredients that inhibit Listeria growth in processed meat. Those reforms lead to a reduction in the rate of listeriosis cases of about 37 percent,  but the rate has remained fairly steady since then. The study looked at Listeria cases from 2009-2011. Of the 1,651 cases of listeriosis that occurred during that period,  93 percent or … [Read more...]

Judge Orders Closure of Alfred Louie for Listeria and Unsanitary Conditions


A district court judge has ordered the closure of Alfred Louie Inc. of Bakersfield, CA until the company cleans its facility, eliminating unsanitary conditions and the presence of Listeria monocytogenes. The problems were discovered during inspections by the U.S. Food and Drug Administration (FDA). Gordon Louie and Victor Louie, the owners of the company, which makes ready-to-eat mung bean and soybean sprouts and wheat flour noodles, have agreed under terms of a court order not to process or distribute food until the problems are corrected. Since 2000, FDA inspectors have documented numerous violations at the facility. In April and May 2013, Listeria was detected in sprouts and in the company’s facility.  In addition to mung bean and soybean sprouts, the  company also makes wheat … [Read more...]

Listeria Recall Prompts Temporary Closure at Garden Fresh


A Listeria recall has prompted the temporary closure of a GardenFresh Foods plant in Milwaukee, the company announced over the weekend. About 100 employees have been reassigned as Garden Fresh works with state and federal investigators to find the source of contamination that has caused more than 50 tons of fresh vegetables and ready-to-eat, salads, dips and spreads. Unlike other foodborne pathogens, Listeria can survive and even thrive at refrigerated temperatures. A spokeswoman for the company told the Milwaukee Journal Sentinel that Garden Fresh was confident it could find the source of contamination and would not reopen the plant until they were certain the problem was solved. The first recall was announced August 30. Since then, the list of recalled products has been expanded … [Read more...]

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