Water used for washing or hydrocooling can act as a source of produce contamination with Listeria monocytogenes. Since this could lead to human infections, controlling L. monocytogenes in hydrocooling water and produce is critical for food safety. Commercial disinfectants (chlorine, quaternary ammonium compounds) are not completely effective in killing L. monocytogenes in wash water or on produce, especially in presence of organic load.
This proposal aims to investigate the potential of a new technology that employs water containing ultra-fine gas bubbles (size ~ 1 micrometer or less) for washing produce (celery, gala apples, romaine lettuce). We will generate ultra-fine ozone (UFO) bubbles in water using a high energy shear method and test the potential of resulting solution to rapidly kill (in 30 to 60 sec) L. monocytogenes in wash water and on produce surface. In addition, the efficacy of UFO bubble water to synergistically improve the Listeria killing potential of aforementioned commercial disinfectants will be tested. The anti-listerial efficacy of UFO bubble water will also be tested in presence of organic load. Successful completion of this project will provide the produce industry with novel antimicrobial treatment for disinfecting wash water and produce in single pass or re- circulated hydrocooling systems.
The widespread distribution of Listeria monocytogenes in agricultural environments such as soil, manure and water results in frequent contamination of food processing areas. Although good agricultural practices partially reduce contamination, however, due to the open nature of farming, it is extremely difficult to completely prevent pathogen influx. Water used for washing or hydrocooling can act as a source of equipment and produce contamination with L. monocytogenes. Since this could lead to human infections, controlling L. monocytogenes in hydrocooling water and on the surface of fresh produce is critical for food safety. Currently used commercial disinfectants (chlorine, peracetic acid, quaternary ammonium compounds) are not completely effective in killing L. monocytogenes in wash water or on the surface of produce, especially in presence of organic load. Moreover, the presence of chemical residues and the formation of harmful organochlorine compounds is an occupational concern due to associated health risks, including cancer. Therefore, there is a need for developing novel strategies that could be employed (either alone or in combination with currently used commercial disinfectants) to control L. monocytogenes in wash water and on surface of fresh produce, vegetables and fruits.
This proposal aims to investigate the potential of a new technology that employs water containing ultra-fine gas bubbles (size ~ 1 micrometer or less) for washing produce (celery, gala apples, romaine lettuce). We will generate ultra-fine ozone (UFO) bubbles in water using a high energy shear method and test the potential of resulting solution to rapidly kill (in 30 to 60 sec) L. monocytogenes in wash water and on produce surface. In addition, the efficacy of UFO bubble water to synergistically improve the Listeria killing potential of aforementioned commercial disinfectants will be tested. The anti-listerial efficacy of UFO bubble water will also be tested in presence of organic load.
Potential impact from anticipated outcomes: Successful completion of this project will provide the produce industry with novel antimicrobial treatment for disinfecting wash water and produce in dump tanks, and single pass or re-circulated hydrocooling systems. This intervention will translate into increased microbiological safety of fresh produce.
Frozen vegetables have emerged as a concern due to their association with foodborne outbreaks such as the multi-country outbreak of Listeria monocytogenes serogroup IVb linked to frozen corn. The capacity of L. monocytogenes to colonize food-processing environments is well-known, making the bacteria a real problem for consumers. However, the significance of the processing environment in the contamination of frozen foods is not well established. This study aimed to identify potential contamination niches of L. monocytogenes in a frozen processing plant and characterize the recovered isolates. A frozen vegetable processing plant was monitored before cleaning activities. A total of 78 points were sampled, including frozen vegetables. Environmental samples belonged to food-contact surfaces (FCS); and non-food-contact surfaces (n-FCS). Positive L. monocytogenes samples were found in FCS (n = 4), n-FCS (n = 9), and the final product (n = 1). A whole-genome sequencing (WGS) analysis revealed two clusters belonging to serotypes 1/2a-3a and 1/2b-3b). The genetic characterization revealed the presence of four different sequence types previously detected in the food industry. The isolate obtained from the final product was the same as one isolate found in n-FCS. A multi-virulence-locus sequence typing (MVLST) analysis showed four different virulence types (VT). The results obtained highlight the relevant role that n-FCS such as floors and drains can play in spreading L. monocytogenes contamination to the final product. View Full-Text
Environmental monitoring (EM) programs are designed to detect the presence of pathogens in food manufacturing environments with the goal of preventing microbial contamination of food. Nevertheless, limited knowledge exists regarding the influence of environmental conditions on microbial recovery during EM. This study utilizes a commercially-available polyurethane foam (PUF) EM tool to determine the influence of environmental factors on the recovery of foodborne pathogens. The specific objectives of this study were to determine if environmental conditions and surface composition impact the recovery of sought-after microorganisms found in food processing environments. These data are compared across 1) microorganism type, 2) surface type, 3) environmental temperature and relative humidity, and 4) exposure time. Two bacteria ( Listeria monocytogenes , Salmonella Typhimurium) and one human norovirus surrogate (Tulane virus [TV]) were inoculated onto three non-porous surfaces (polypropylene, stainless steel, neoprene). Surfaces were held in an environmental chamber for 24 or 72 h at 30°C/30%, 6°C/85%, and 30°C/85% relative humidity (RH). Data indicate that microbial recovery from environmental surfaces significantly (p ≤ 0.05) varies by microorganism type, environmental conditions, and exposure time. For instance, all microorganisms were significantly different from each other, with the greatest mean log reduction being TV and the lesser reduction being L. monocytogenes at 4.94 ± 1.75 log 10 PFU/surface and 2.54 ± 0.91 log 10 CFU/surface, respectively. Overall, these data can be used to improve the effectiveness of EM programs and underscores the need to better comprehend how EM test results are impacted by food manufacturing environmental conditions.
Brookshire Grocery Company of Tyler, Texas has issued a voluntary recall of bulk Yellow Flesh Peaches available in stores between 4/15/22 and 5/17/22, because they have the potential to be contaminated with Listeria monocytogenes, an organism which can cause serious and sometimes fatal infections in young children, frail or elderly people, and others with weakened immune systems. Although healthy individuals may suffer only short-term symptoms such as high fever, severe headache, stiffness, nausea, abdominal pain and diarrhea, Listeria infection can cause miscarriages and stillbirths among pregnant women.
Yellow Flesh Peaches subject to this voluntary recall were sold at Brookshire’s, Super 1 Foods, Spring Market, and FRESH by Brookshire’s retail stores in Texas, Louisiana, and Arkansas.
The Yellow Flesh Peaches are a product of Chile and may have a PLU sticker with the words “CHILE” and “TREE RIPE YELLOW PEACH” and the numeral 4044. Potentially affected product was received from a distributor and shipped to store locations between 4/15/22 and 4/24/22. Due to the fresh nature of the product, no fresh fruit is expected to be in any household, but consumers who may have frozen or otherwise preserved this item may have it in their possession.
No illnesses have been reported to Brookshire Grocery Company to date.
The recall is a result of random sampling conducted at Brookshire’s distribution center by the Texas Department of State Health Services after potentially affected product was shipped to stores and which revealed a positive test for Listeria monocytogenes. Brookshire Grocery Company immediately disposed of the affected product at the distribution center, issued a recall notice to its stores, and implemented sanitation procedures at all retail and affected locations.
Any consumer who may have purchased bulk Yellow Flesh Peaches from a Brookshire Grocery Company retail store between 4/15/22 and 5/17/22 and still has them in their possession should dispose of the product immediately. Consumers with questions may contact Brookshire Grocery Company at 1-888-937-3776.
Identification information of the recalled product
Product category Food
Product subcategory Prepared meals and snacks
Product brand name SAINT JEAN
Model names or references Supreme Soufflés Emmental de Savoie IGP
Identification of products
Use-by date 08/06/2022
Packaging Vacuum tray
Marketing start/end date From 05/13/2022 to 05/17/2022
Storage temperature Product to be stored in the refrigerator
Health mark EN 38.409.005 EC
Geographic area of sale Whole France
Distributors Auchan, Intermarché, Netto, Leclerc, Carrefour, System U, Colruyt, CE (Astic Injection, Mair Renage, St Egrève Hospital), Center Frais, Gerentes, Maison du Frais, Montaigne early vegetables, Savoie Poultry, Segep left banks, Tomat Seriz, St John’s shop
Coprosain recall Product: Coprosain brand smoked Antwerpen fillet. Problem: Presence of Listeria. In agreement with the FASFC, Coprosain withdraws the Filet d’Anvers from the Coprosain brand from sale and recalls it from consumers due to the presence of Listeria.
Coprosain asks its customers not to consume this product and to return it to the point of sale where it was purchased and where it will be reimbursed.
The AGES informs about a recall of the company Lidl Austria. The company recalled the product Culinea Austrian meat dumplings (10 pieces), 1000 g on May 24th, 2022:
recall reason ; Listeria
Marketed by ; Lidl Austria
Manufacturer; Weinbergmaier GmbH
PRODUCT RECALL: “Culinea Austrian meat dumplings (10 pieces), 1000 g” from the manufacturer “Weinbergmaier GmbH”
The manufacturer “Weinbergmaier GmbH” is currently recalling the product “Culinea Austrian meat dumplings (10 pieces), 1000 g” with the best before date April 21, 2023 and batch L2164.
Listeria monocytogenes was detected during a routine inspection of the flesh. Listeria monocytogenes can trigger severe gastrointestinal diseases and symptoms similar to those of a flu. Serious disease progressions can occur in certain groups of people (infants, small children, pregnant women as well as old and sick people). Because of this health risk, customers should be aware of the recall and not consume the affected product.
The affected food “Culinea Austrian meat dumplings (10 pieces), 1000 g” with the best before date April 21, 2023 and batch L2164 was sold at Lidl Austria. For reasons of consistent consumer protection, Lidl Austria reacted immediately and removed the affected food from sale. The food can be returned in all Lidl branches. The purchase price will of course be refunded, even without presenting the receipt.
Only the food “Culinea Österreichische Fleischknödel (10 pieces), 1000 g” with the best before date April 21, 2023 and batch L2164 is affected by the recall. Other Culinea brand foods sold at Lidl Austria are not affected by this recall.
The manufacturer Weinbergmaier GmbH apologizes to all those affected for the inconvenience caused. This warning does not state that the hazard was caused by Lidl Austria or Weinbergmaier GmbH.
Customer service If you have any questions, the Lidl Austria customer service is available on the toll-free number 0800/500 810 from Monday to Friday from 8 a.m. to 6 p.m. and on Saturday from 8 a.m. to 5 p.m.
Hawthorne Valley Association raw milk in New York is being recalled for possible Listeria monocytogenes contamination, according to the New York State Department of Agriculture and Markets. No illnesses have been reported to date in connection with the consumption of this unpasteurized milk.