Research – Battling bacterial biofilms: Winning the war against stubborn microbes

Food Safety News

Imagine a group of bacteria teaming up like a gang, creating a fortress around them. This is essentially what bacterial biofilms are – a tough, sticky barrier that makes them incredibly difficult to defeat. They form on medical devices, water pipes, kitchen surfaces, and even in our bodies, leading to persistent infections and contamination. In the food industry, bacterial biofilms formed on food and non-food contact surfaces are associated with many foodborne outbreaks.

Once attached to surfaces, biofilms can remain for long periods, ranging from days to years. A recent scientific study indicated that Listeria monocytogenes biofilms persisted for 17 years on contact surfaces in a seafood processing environment (see below for further reading). Although this formidable microbial community is resistant to chemical, physical, or biological treatments, there are proven ways to deal with them.

Research – The Relationship between Biofilm Phenotypes and Biofilm-Associated Genes in Food-Related Listeria monocytogenes Strains

MDPI

Listeria monocytogenes is an important pathogen responsible for listeriosis, a serious foodborne illness associated with high mortality rates. Therefore, L. monocytogenes is considered a challenge for the food industry due to the ability of some strains to persist in food-associated environments. Biofilm production is presumed to contribute to increased L. monocytogenes resistance and persistence. The aims of this study were to (1) assess the biofilm formation of L. monocytogenes isolates from a meat processing facility and sheep farm previously characterized and subjected to whole-genome sequencing and (2) perform a comparative genomic analysis to compare the biofilm formation and the presence of a known set of biofilm-associated genes and related resistance or persistence markers. Among the 37 L. monocytogenes isolates of 15 sequence types and four serogroups involved in this study, 14%, 62%, and 24% resulted in the formation of weak, moderate, and strong biofilm, respectively. Increased biofilm-forming ability was associated with the presence of the stress survival islet 1 (SSI-1), inlL, and the truncated inlA genes. Combining the phenotypic and genotypic data may contribute to understanding the relationships between biofilm-associated genes and L. monocytogenes biofilm-forming ability, enabling improvement in the control of this foodborne pathogen.

UK – FSA assesses raw pet food risk to animals and people

Food Safety News

The Food Standards Agency (FSA) has analyzed the risk to dogs and cats from eating contaminated raw pet food and the impact on the people who feed them such products.

Raw pet food has become increasingly popular in recent years. Such items are made from Category 3 Animal-By-Products (ABP) that have been passed fit for human consumption in a slaughterhouse but are surplus to requirements. They do not undergo cooking or heat treatment so that the end product can be contaminated with pathogens. The majority are sold frozen and typically have a best-before date of over one year.

The assessment considers the risk of dogs and cats acquiring Salmonella, beta-glucuronidase-positive E. coli, Shiga toxin-producing E. coli (STEC), Campylobacter, and methicillin-resistant Staphylococcus aureus (MRSA) infection from contaminated products. It also covers the risk of infection to animal owners by handling these products at home or via transmission from an infected pet.

Research – Salmonellosis

Sante Publique

Non-typhoidal salmonellosis is an infectious disease caused by salmonella that infects the digestive tract. It is usually characterized by gastrointestinal disorders.

Research – Avoiding Food Poisoning: How a Tiny Chip Can Make Your Food Safer Than Ever

Scitech Daily

A new microfluidic chip developed by researchers enables quick, effective detection of multiple foodborne pathogens simultaneously, improving food safety and preventing contaminated products from entering the market.

Every so often, a food product is recalled because of some sort of contamination. For consumers of such products, a recall can trigger doubt in the safety and reliability of what they eat and drink. In many cases, a recall will come too late to keep some people from getting ill.

In spite of the food industry’s efforts to fight pathogens, products are still contaminated and people still get sick. Much of the problem stems from the tools available to screen for harmful pathogens, which are often not effective enough at protecting the public.

USA – Botulism outbreak in California linked to family events and homemade food

Food Safety News

Public health officials in California are investigating an outbreak of botulism infections related to family events on June 21 and 22 in Clovis, CA.

Staff from the California Department of Public Health and the U.S. Centers for Disease Control and Prevention are working together on the investigation.

During a news conference, Dr. Rais Vohra, Interim Health Officer for Fresno County, said the outbreak is a reminder of how important it is to follow proper guidelines for home canning. The food served at the family gatherings was prepared by family members. It can take up to 10 days for symptoms of botulism infection to appear.

USA – Yellowfin Tuna recalled in California over high histamine levels

Food Safety News

Fresh Catch Inc of Los Angeles, CA is recalling certain Fresh Catch Inc. Yellowfin Tuna because of high histamine levels.

According to the details posted online by the Food and Drugs Administration (FDA), the recall was initiated on June 12, 2024, and is ongoing.

The recalled product was distributed in California.

Taiwan – Six hospitalized in Taichung after suspected food poisoning from oysters

Taiwan News

TAIPEI (Taiwan News) — Six people were hospitalized in Taichung last week after experiencing food poisoning symptoms following a seafood meal.

A man surnamed Lin (林) visited a stir-fry restaurant with friends. They had grilled oysters and other seafood dishes, according to CNA.

Lin later sought medical attention on June 18 and had diarrhea, abdominal pain, and nausea. Doctors suspected food poisoning.

Lin suspected the seafood may have been undercooked or spoiled. His friends reported experiencing similar symptoms, leading to the hospitalization of all six individuals.

Li’s Hospital Daja confirmed Lin’s emergency room visit on Wednesday (June 26). Examination revealed elevated inflammatory markers and blood in his stool.

Concerns about a potential food-borne illness outbreak arose when two of Lin’s friends also sought medical attention. Hospital staff promptly notified the Taichung Health Bureau

France – TRAY 1 CHICKEN THIGH UNDER ATMOSPHERE – Listeria monocytogenes

Gov France

Product category
Food
Product subcategory
Meats
Product brand name
RENTED
Model names or references
TRAY 1 CHICKEN THIGH UNDER ATMOSPHERE
Product identification
GTIN Batch Date
3266980282929 2024105460 Expiry date 06/14/2024
3266980282929 2024105460 Use-by date 06/15/2024
Products List
TRACA_1_CUISSE.pdfAttachment
Start/end date of marketing
From 06/03/2024 to 06/15/2024
Storage temperature
Product to be kept in the refrigerator
Health mark
FR 72 168 001 CE
Geographic area of ​​sale
Whole France
Distributors
Intermarché, Super U, Leclerc

France – 2 Chicken thighs in a protective atmosphere – Listeria monocytogenes

Gov France

Product category
Food
Product subcategory
Meats
Product brand name
Rented
Model names or references
2 chicken thighs in a protective atmosphere
Product identification
GTIN Batch Date
3266980294458 2024105460 Use-by date 06/16/2024
3266980294458 2024105460 Expiry date 06/17/2024
3266980294458 2024105460 Use-by date 06/18/2024
3266980294465 2024105460 Use-by date 06/18/2024
3266980318680 2024105460 Use-by date 06/11/2024
3266980318680 2024105460 Expiry date 12/06/2024
3266980318680 2024105460 Expiry date 06/13/2024
3266980318680 2024105460 Expiry date 06/17/2024
3266980318697 2024105460 Expiry date 06/17/2024
Products List
Rappel_Conso_Traça_cuisses_x2.pdfAttachment
Start/End of marketing date
From 05/31/2024 to 06/18/2024
Storage temperature
Product to keep in the refrigerator
Health mark
FR 72 168 001 CE
Geographic area of ​​sale
Whole France
Distributors
Carrefour – Casino – Monoprix – Auchan – Francap – Leclerc – Intermarché – Houra – Système U