Category Archives: Food Microbiology Research

Czech Republic – STEAMED HAM, SLICED – Microbial Activity

Potravinynapranyri

Illustrative photo #1

Place of inspection:
Vřesina ( Sportovní 326/6, 747 20 Vřesina )
ID: 01738950
Food group: Meat and meat products Heat-treated perishable products

STEAMED HAM, SLICED
Category: Dangerous foods
Invalid parameter:

changes caused by microbial activity

The product had a sticky surface, rough edges and smelled of spoilage. Food is not considered safe if it shows signs of spoilage.

The food was more than a month past its use-by date. 

Batch: 940030
Expiration date: 16/06/2022
Date of sample collection: 21/07/2022
Reference number: 22-000499-SZPI-CZ
The sample was detected by the official control of the State Agricultural and Food Inspection.

Research – Bacterial Infections and Ice Cream – a Risky Mix

Food Poison Journal

Great article to read at the above link, the table below is edited there is more information in the article.

Year State Agent Brand
2014 Washington Listeria Snoqualmie Ice Cream
2010-2015 Multistate Listeria Blue Bell
2008 Vermont E. coli O157 Homemade ice cream, unpasteurized milk
2008 Minnesota Salmonella  Homemade ice cream
2008 California E. coli O157 Consumed at a restaurant; brand or pasteurization unknown
2007 California Norovirus Ice cream with berries; berries were likely the contaminated ingredient
2007 Pennsylvania Campylobacter Homemade ice cream
2007 Minnesota Hepatitis A Ice cream or yogurt at a restaurant
2007 West Virginia Salmonella Homemade ice cream
2006 Belgium E. coli O145 Ice cream at a farm
2006 California Salmonella Homemade ice cream
2005 Multistate Salmonella  Cold Stone Creamery (cake batter was the contaminated ingredient)
1994 Multistate Salmonella Schwan’s Ice Cream – the estimated # of ill cases is 224,000!
1993 Florida Salmonella  Homemade ice cream

Belgium – Barry Callebaut site back to normal after Salmonella scare

Food Safety News

A Barry Callebaut chocolate factory in Belgium is back operating at full capacity after a Salmonella contamination scare earlier this year.

Cleaning of the factory in Wieze is nearing completion so it has returned to running at normal levels after operations were stopped in late June.

“I would like to express my deepest gratitude to our customers for their understanding during this difficult period, and to all our employees who worked tirelessly for weeks to get the Wieze factory up and running again,” said Peter Boone, CEO of Barry Callebaut.

The company previously warned the incident is expected to have a significant financial impact when the full year result figures are published in November.

Mondelez was one of several companies impacted, as it is supplied by Barry Callebaut. The alert meant it had to limit the retail availability of several ranges of biscuits.

Sweden – Sweden searches for the source of Crypto and Salmonella outbreaks

Food Safety News

Swedish officials are investigating a recent increase in reported cases of Cryptosporidium.

A total of 61 people have been confirmed as being infected by the same certain type of Cryptosporidium parvum. These people fell ill from Sept. 25 to Oct. 10 and live in 10 different regions of the country.

Of confirmed cases, 41 are women and 20 are men. They are aged between 11 and 86 years old with an average age of 44.

There are another 98 possible infections that have been reported within the same period and some of these may also belong to the outbreak.

The Public Health Agency of Sweden (Folkhälsomyndigheten) said the increase is under investigation but could be caused by food with wide distribution in the country.

Local infection control units, the Swedish Food Agency (Livsmedelsverket) and Folkhälsomyndigheten are investigating the outbreak to identify the source of infection.

Cryptosporidium is a parasite that, if ingested, can cause cryptosporidiosis. Transmission occurs mainly through contact with contaminated water but can be via food or exposure to infected animals or water contaminated by the feces of infected animals.

The main symptom is watery diarrhea, which can range from mild to severe. It is often accompanied by stomach pain, nausea or vomiting, fever, and sometimes dehydration and weight loss. Symptoms usually appear two to 10 days after infection and last one to two weeks.

USA – CDFA ANNOUNCES RECALL OF RAW GOAT MILK PRODUCED AT VALLEY MILK SIMPLY BOTTLED OF STANISLAUS COUNTY

CDFA

SACRAMENTO, October 21, 2022 – Raw goat milk produced and packaged by Valley Milk Simply Bottled of Stanislaus County is the subject of a statewide recall and quarantine order announced by California State Veterinarian Dr. Annette Jones.  The quarantine order came following the confirmed detection of the bacteria Campylobacter jejuni in the farm’s packaged raw whole goat milk sampled and tested by the California Department of Food and Agriculture.

The order applies to “Valley Milk Simply Bottled Raw Goat Milk” and “DESI MILK Raw Goat Milk” distributed in half-gallon (64 oz) plastic jugs with a code date marked on the container of OCT 21 2022 through OCT 31 2022.

Consumers are strongly urged to dispose of any product remaining in their refrigerators, and retailers are to pull the product immediately from their shelves. The current order does not include the farm’s raw cow milk.

CDFA found the campylobacter bacteria in a routine sample collected at the Valley Milk Simply Bottled production and packaging facility.  No illnesses have been reported.

Symptoms of campylobacteriosis include diarrhea, abdominal cramps, and fever.  Most people with camplylobacteriosis recover completely.  Illness usually occurs 2 to 5 days after exposure to campylobacter and lasts about a week.  The illness is usually mild and some people with campylobacteriosis have no symptoms at all.  However, in some persons with compromised immune systems, it can cause a serious, life-threatening infection.  A small percentage of people may have joint pain and swelling after infection.  In addition, a rare disease called Guillian-Barre syndrome that causes weakness and paralysis can occur several weeks after the initial illness.

USA – Salmonella outbreak linked to Chili’s South Indian Cuisine in Seattle

Food Poison Journal

Food Poisoning Salmonella

Summary

Public Health is investigating an outbreak of salmonellosis (caused by Salmonella bacteria) associated with Chili’s South Indian Cuisine in Seattle. The investigation is ongoing. At this time, we have not identified how Salmonella was spread within the restaurant. This is not uncommon because Salmonella can spread through contaminated food items, environmental surfaces, and from person to person.

Illnesses

Since October 6, 2022, three people from two separate meal parties reported becoming ill after consuming food from Chili’s South Indian Cuisine in Seattle on September 17, 2022 and September 23, 2022. All the people developed one or more symptoms consistent with salmonellosis, including diarrhea, abdominal cramping, nausea, and vomiting. We have not identified any ill employees.

Public Health actions

Public Health conducted interviews with the people ill with salmonellosis to identify potential common exposures and found that they all became ill after eating food from Chili’s South Indian Cuisine.

Environmental Health Investigators visited the restaurant on October 19, 2022. Investigators identified sanitizing issues, potential cross contamination, inadequate hand washing, and lack of proper access to handwashing stations. Corrective actions were taken during the inspection. Environmental Health Investigators will revisit the facility within 2 weeks to ensure proper compliance with food handling practices.

No ill employees were identified at the time of inspection. Investigators reviewed with restaurant management the requirement that ill staff are not allowed to work until they are symptom-free. Investigators provided education about preventing the spread of Salmonella – including preventing cross contamination, proper cooling methods, sanitizing procedures and handwashing.

Laboratory testing

Two of the cases have confirmatory testing indicating infections with Salmonella via culture. Both cases have the same strain of Salmonella, based on genetic fingerprinting (whole genome sequencing or WGS) at the Washington State Public Health Laboratory. The third case did not have confirmatory testing but had symptoms consistent with Salmonellosis and is epidemiologically linked.

Research – Bacteriophage cocktail shows promise against Vibrio outbreaks in shrimp farms

The Fish Site

Food Illness

Researchers from the Biological Research Center of the Northwest, the Autonomous University of Nuevo León, the Food and Development Research Center AC and the University of Girona evaluated the protective effects of a cocktail of bacteriophages in L. vannamei post larvae against Vibrio bacteria. The scientists found that treating the PLs with bacteriophages kept Vibrio infections at bay and reduced their concentrations in culture water – without harming the surrounding bacterial communities.

Vibrio populations and bacteriophages

Vibrio bacteria are widely disseminated in ocean environments and several Vibrio species are responsible for disease outbreaks in marine animals – especially penaeid shrimp, different fish species and molluscs. Some strains of V. harveyi and V. campbellii have been implicated in disease outbreaks in shrimp hatcheries and grow-out facilities around the world. They’ve also been associated with coral infections.

“We used culture-dependent and culture-independent approaches to explore their effects on bacterial communities associated with shrimp post larvae,” the researchers said. According to the results of the study, administering the phage cocktail drastically reduced Vibrio counts in both in vitro and in vivo environments.

Research – Antifungal action of quaternary ammonium compounds against environmental molds isolated from food industries

Wiley Online

CDC Mould

Abstract

Molds are ubiquitously found microorganisms that are usually present as contaminants in food industrial environments. It has been shown that Cladosporium and Aspergillus genera are two of the most abundant and widely distributed in these locations because they are highly resistant species to sanitizing treatments. Hence, the search of antimicrobial compounds that are effective to these types of fungal contamination becomes relevant. The aim of this report was to evaluate the antifungal capacity of two commercial preparations made both with benzalkonium chloride (a first generation QAC) alone and with the addition of glutaraldehyde at different concentrations and contact times. A suspension-neutralization test was performed employing spores of five strains of both Aspergillus section Nigri and Cladosporium cladosporioides, all isolated from food industries environments. Results have shown that benzalkonium chloride preparation was successful in destroying Cladosporium spores at 5% (v/v) concentration (average 4D value of 9.1 min) but failed in neutralizing Aspergillus propagules at the same conditions. On the other hand, the commercial mixture made of benzalkonium chloride and glutaraldehyde was effective in the inactivation of all food spoilage fungi spores at 1% (v/v) concentration (average 4D value of 1.8 and 8.8 min for Cladosporium and Aspergillus strains, respectively).

Research – Lactic Acid Bacteria and Bacteriocins: Novel Biotechnological Approach for Biopreservation of Meat and Meat Products

MDPI

Meat and meat products are perishable in nature, and easily susceptible to microbial contamination and chemical deterioration. This not only results in an increased risk to health of consumers, but also causes economic loss to the meat industry. Some microorganisms of the lactic acid bacteria (LAB) group and their ribosomal-synthesized antimicrobial peptides—especially bacteriocins—can be used as a natural preservative, and an alternative to chemical preservatives in meat industry. Purified or partially purified bacteriocins can be used as a food additive or incorporated in active packaging, while bacteriocin-producing cells could be added as starter or protective cultures for fermented meats. Large-scale applications of bacteriocins are limited, however, mainly due to the narrow antimicrobial spectrum and varying stability in different food matrixes. To overcome these limitations, bioengineering and biotechnological techniques are being employed to combine two or more classes of bacteriocins and develop novel bacteriocins with high efficacy. These approaches, in combination with hurdle concepts (active packaging), provide adequate safety by reducing the pathogenicity of spoilage microorganisms, improving sensory characteristics (e.g., desirable flavor, texture, aroma) and enhancing the shelf life of meat-based products. In this review, the biosynthesis of different classes of LAB bacteriocins, their mechanism of action and their role in the preservation of meats and meat products are reviewed.

Mycotoxins – New EU maximum limits for Ochratoxin A in certain foodstuffs

Affidia Journal

On August 8th was published the Commission Regulation (EU) 2022/1370 of 5 August 2022 amending Regulation (EC) No 1881/2006 as regards maximum levels of Ochratoxin A in certain foodstuffs.

Ochratoxin A (OTA) is a naturally occurring foodborne mycotoxin produced by various fungi of the genus Aspergillus and Penicillium, and it can be found in a wide variety of agricultural commodities, such as grains, seeds and beans, dried fruits, spices, and roots.

OTA is formed during sun drying and storage of crops, and, due to its stability under moderate heating, it can persist along the food production chain. However, losses ranging up to 90% have been observed at temperatures above 180°C.

Several toxic effects associated with OTA have been reported over the years.

The International Agency for Research on Cancer has included OTA in its Group 2 carcinogens, due to its kidney carcinogenicity, even if the mechanisms of genotoxicity are still unclear.

In 2006 the European Food Safety Authority performed a first risk assessment for OTA. In agreement with this assessment, the European Commission established in Regulation (EC) 1881/2006 maximum admissible levels of OTA for human consumption in many foodstuffs, such as cereals, coffee, grapes, grapefruit, dried vine fruits, wine, spices, and liquorice.

In recent years, further findings of high levels of Ochratoxin A were observed in food products for which no maximum levels were set at EU level, this raised questions regarding the necessity of setting new maximum levels for OTA in these foods.

In May 2020, EFSA published a revision of the OTA risk assessment, taking into account the new scientific evidence.

Based on this new risk assessment, the EU Commission established the Regulation (EU) 2022/1370, which revised the maximum levels for OTA present in Regulation (EC) 1881/2006 as follows:
• setting a maximum level for foods not yet included that contribute to human exposure to OTA;
• setting a level for non-alcoholic malt beverages and date syrup, pending the determination of a link with the OTA content of malt and dates;
• reducing the levels already set in certain foods (e.g. bakery products, dried vine fruit, roasted coffee and soluble coffee);
• the existing provisions for ochratoxin A in certain spices has been broadened to all spices.
For cheese and ham, it has been established that additional monitoring on the presence of ochratoxin A is appropriate before the setting of maximum levels.

The new Regulation will enter into force on the 28th of August 2022 and it shall apply from 1 January 2023.