Category Archives: Food Microbiology Research

RASFF Alert – Animal Feed – Moulds/Mold – Bran

RASFF

Wheat bran infested with moulds from Ukraine in Poland

Research – Quantitative Determination Of Campylobacter On Broilers Along 22 UK Processing Lines, To Identify Potential Process Control Points and Cross-contamination From Colonized To Uncolonized Flocks

Journal of Food Protection

As part of a program to reduce numbers of the human pathogen Campylobacter on retail chickens twenty-two broiler processing lines, representing over 90% of United Kingdom (UK) production, were characterized by enumerating Campylobacter on pooled neck skins after the exsanguination, scalding, defeathering, evisceration, crop removal, inside-outside washing, and air-chilling stages of processing.  Sixteen of the processing lines investigated showed significant (p<0.05) reductions in Campylobacter numbers because of carcass scalding.  However, in all these lines, the following defeathering stage caused a significant increase in Campylobacter contamination that effectively negated the reductions caused by scalding.  On four processing lines, primary chilling also caused a significant reduction in numbers of Campylobacter.  On three lines, there was a significant microbiological benefit from inside-outside (I/O) washing.  The stages where Campylobacter numbers were reduced require further investigations to determine the specific mechanisms responsible so that the observed pathogen reductions can be optimized, and more widely implemented. The transfer of up to 4 log cfu Campylobacter per gram of neck skin from a colonized flock to a following uncolonized flock was observed.  The cross contamination was substantial and still detectable after 5,000 carcasses from an uncolonized flock had been processed.  The numbers of Campylobacter recovered from the uncolonized flocks were highest on the first of the uncolonized birds to pass along the line and, in general, numbers fell as more uncolonized birds were processed.  Air sampling recovered low numbers at the processing stages monitored, indicating that airborne transmission was unlikely to be the primary transfer mechanism operating for cross-contamination between flocks.

Research -The annual cost of foodborne illness in Australia

FSANZ

Executive summary
Foodborne illness causes a significant health burden in Australia. Estimates of both the extent of foodborne illness and the costs arising from illness are essential for measuring the impact on the population.
In 2010 it was estimated that Australians experience almost 16million episodes of gastroenteritis each year, with about one quarter of these due to contaminated food. This report updates these numbers to circa 2019 and estimates the associated costs to individuals and the health system. As foodborne disease interventions are often targeted at specific causes of illness, costs are also provided for ten high-priority pathogens.
We estimate that foodborne illness and its sequelae costs Australia AUD 2.44billion each year. The largest component of this cost is lost productivity due to non-fatal illness, followed by premature mortality and direct costs (including hospitalisations and other health care use).
While costs due to lost productivity are lower under the more conservative friction cost model, it remains the largest component cost for foodborne illness due to all causes. The pathogen with the highest individual cost is Campylobacter (AUD 365millionper year), while norovirus, other pathogenic E. coli, and Salmonella are all estimated to cost Australians over AUD 100 million each year. Lost productivity is the largest component cost for most pathogens, although premature mortality is the largest cost for pathogens that typically cause more severe illness, such as Listeria monocytogenes, Shiga toxin-producing Escherichia Coli, and Salmonella.
Significant advances in this report include the incorporation of estimated willingness to pay to avoid pain and suffering based on a discrete choice experiment from another FSANZ commissioned study, and the use of a simulation approach to estimating costs which provides uncertainty intervals on all estimates. A costing tool is provided with this report to allow estimates to be updated in the future.
Costs associated with surveillance for foodborne pathogens and related to outbreak investigations are considered separately to the model. Likewise, industry costs due to outbreaks such as lost sales, disposal of products, recall costs, enforcement related costs and potential business costs are not included in the costing model. Key limitations in this work include the lack of data on the long-term burden and health care usage associated with sequelae or ongoing illness due to toxoplasmosis and listeriosis. These costs are not included in this report due to unavailability of data. Costs of pain and suffering, which we approximate using willingness to pay to avoid pain and suffering, are relatively low compared to those estimated for other countries, which may represent differences in underlying preferences across countries and could suggest that greater international standardisation of methods and data collection may be required.

This report demonstrates that foodborne illness results in a substantial cost to Australia and that interventions to improve food safety across industry, retail, and consumers are needed to improve public health. Pathogen-specific costing estimates allow policy makers to target such interventions at individual pathogens, with the end goal of reducing the burden due to foodborne illness.

USA – FDA Core Outbreak Investigation Table

FDA

What’s New

  • For the Salmonella Litchfield outbreak in a not yet identified product (reference #1105), the case count has increased from 28 cases to 29 cases.
  • For the E. coli O157:H7 outbreak (reference #1081) in a not yet identified product, CDC announced the outbreak is over on 10/4/2022. FDA’s investigation is ongoing.
  • For the Listeria monocytogenes outbreak in Brie and Camembert cheese (reference #1106), an Outbreak Advisory was issued on 9/30/2022.
  • For the Salmonella Typhimurium outbreak (reference #1095), one additional case was added, and the product linked to illnesses has been changed to cantaloupe. The vehicle of the outbreak was confirmed after the outbreak ended. Given the product(s) were no longer on the market, there was no ongoing risk to public health and no need to avoid eating cantaloupe. Additional information on this outbreak will be forthcoming.
  • For the outbreak of Cyclospora cayetanensis in a not yet identified product (reference #1080) the case count has increased from 81 to 84 and the outbreak has ended.
  • For the outbreak of Cyclospora cayetanensis in a not yet identified product (reference #1084) the outbreak has ended.
  • For Listeria monocytogenes adverse event in a not identified product (reference #1040), the outbreak has ended.

Research – Microbiological Quality of Red Meat Offal Produced at Australian Export Establishments

MDPI

A national baseline study of offal hygiene was undertaken at 17 Australian export establishments. A total of 1756 samples of different offal types were analysed for aerobic plate count (APC), generic Escherichia coli, and coliform bacteria. Average APC values varied from 1.51 to 5.26 Log10 CFU/g, depending on species and offal type. The average APC on beef, sheep, lamb, and goat offal was 3.25, 3.38, 3.70, and 2.97 Log10 CFU/g, respectively. There is a small but significant difference in APC on offal sampled frozen (3.26 Log10 CFU/g) and offal sampled fresh (3.73 Log10 CFU/g). Escherichia coli prevalence on beef, sheep, lamb, and goat offal was 15.4%, 28.1%, 17.5%, and 39.3%, respectively. The number of E. coli on positive offal samples ranged from 1.42 to 1.82 Log10 CFU/g. While the quality of some offal approach that of muscle meat, the hygienic quality of red meat offal can be understood by considering the anatomical site from which it is harvested, the usual bacterial levels found at that site, the difficulty in hygienically removing the offal from the carcase, the process prior to packing, and the chilling method used. View Full-Text

Research – Bacterial Attachment and Biofilm Formation on Antimicrobial Sealants and Stainless Steel Surfaces

MDPI

Biofilm of antibiotic resistant bacteria

Biofilms are highly resistant to external forces, especially chemicals. Hence, alternative control strategies, like antimicrobial substances, are forced. Antimicrobial surfaces can inhibit and reduce microbial adhesion to surfaces, preventing biofilm formation. Thus, this research aimed to investigate the bacterial attachment and biofilm formation on different sealants and stainless steel (SS) surfaces with or without antimicrobials on two Gram-positive biofilm forming bacterial strains. Antimicrobial surfaces were either incorporated or coated with anti-microbial, -fungal or/and bactericidal agents. Attachment (after 3 h) and early-stage biofilm formation (after 48 h) of Staphylococcus capitis (S. capitis) and Microbacterium lacticum (M. lacticum) onto different surfaces were assessed using the plate count method. In general, bacterial adhesion on sealants was lower compared to adhesion on SS, for surfaces with and without antimicrobials. Antimicrobial coatings on SS surfaces played a role in reducing early-stage biofilm formation for S. capitis, however, no effects were observed for M. lacticum. S. capitis adhesion and biofilm formation were reduced by 8% and 25%, respectively, on SS coated with an antimicrobial substance (SS_4_M), compared to the same surface without the antimicrobial coating (SS_4_control). Incorporation of both antifungicidal and bactericidal agents (S_5_FB) significantly reduced (p ≤ 0.05) early-stage biofilm formation of M. lacticum, compared to the other sealants incoportating either solely antifungal agents (S_2_F) or no active compound (S_control). Furthermore, the thickness of the coating layer correlated weakly with the antimicrobial effect. Hence, equipment manufacturers and food producers should carefully select antimicrobial surfaces as their effects on bacterial adhesion and early-stage biofilm formation depend on the active agent and bacterial species.

USA – MEMORANDUM OF UNDERSTANDING – a collaborative efforts to reduce the occurrence of foodborne illness 

FDA

I. PURPOSE

This Memorandum of Understanding (MOU) constitutes an agreement between two Agencies within the U.S. Department of Health and Human Services (DHHS), specifically the Centers for Disease Control and Prevention’s (CDC) National Center for Environmental Health (NCEH) and the Food and Drug Administration (FDA) – hereinafter referred to individually as “Partner” and collectively as the “Partners.”

The purpose of this MOU is to outline an agreement through which both Partners intend to advance collaborative efforts to reduce the occurrence of foodborne illness risk factors in retail and foodservice establishments. Both Partners intend to promote the joint efforts established under this MOU, subject to the availability of funding and other necessary resources, which will be based on communication as the foundation of the two Partners working together to advance safe food practices in the United States.

II. BACKGROUND

Under the FD&C Act, the FDA, is directed to promote and protect the public health by assuring the safety, efficacy, and security of drugs, veterinary products, medical devices and radiological products as well as the safety and security of foods, dietary supplements, and cosmetics. The FDA also has responsibility for regulating the manufacturing, marketing, and distribution of tobacco products to protect the public health and to reduce tobacco use by minors. The mission of FDA is to enforce laws enacted by the U.S. Congress and regulations established by the Agency to protect the consumer’s health and safety. To accomplish its mission, the FDA must stay abreast of the latest developments in research and communicate with stakeholders about complex scientific and public health issues. Increased development of research, education, and outreach partnerships within the CDC NCEH will greatly contribute to FDA’s mission.

The FDA serves as a lead federal agency for retail food protection. Ensuring the safety of food at the retail level requires the collaboration of the FDA, other federal Agencies including, but not limited to, CDC and the U.S. Department of Agriculture, as well as state, tribal, local, and territorial (STLT) regulatory agencies, industry, academia, and consumers.

STLT governments exercise primary regulatory control over the retail segment of the food industry and provide the largest portion of the program’s resources. The FDA’s ability to leverage the resources of STLTs, while providing expertise, guidance, and technical assistance, represents an effective public health partnership and a model for a national integrated food safety system (IFSS).

USA – Torero’s Mexican Restaurant in Renton linked to E. coli Outbreak

Food Poison Journal

Summary

Public Health is investigating an outbreak of Shiga toxin-producing E. coli (also known as STEC) associated with diarrhea and abdominal pain at Torero’s Mexican Restaurant in Renton.

The investigation is ongoing. At this time, we have not identified how STEC was spread within the restaurant. This is not uncommon for STEC outbreaks, because the bacteria can spread through contaminated food items, environmental surfaces, and from person to person.

Illnesses

Since September 5, 2022, 3 people from 3 separate meal parties reported becoming ill after eating food from Torero’s Mexican Restaurant in Renton on September 3, 2022 and September 7, 2022. All of the people developed one or more symptoms consistent with STEC, including diarrhea (often bloody), abdominal cramping, nausea, and vomiting. We have not identified any ill employees.

USA – Michigan consumers warned of produce contaminated with human waste

Food Safety News

The Michigan Department of Agriculture and Rural Development (MDARD) is advising consumers not to eat any Kuntry Gardens produce or products containing produce from Kuntry Gardens of Homer, MI, because it may be contaminated with raw, untreated human waste.

All of the implicated products are expected to be labeled under the name Kuntry Gardens.

During a routine produce safety inspection, MDARD staff identified that Kuntry Gardens was using raw, untreated human waste on the fields where produce was grown for sale to local grocery stores and direct sale. The use of raw, untreated, human waste for growing commodities intended for human food is a violation of state and federal laws and regulations.

If not treated professionally, human waste and other body fluids can spread dangerous infectious diseases such as hepatitis A, Clostridium difficile, E. coli, rotavirus and norovirus.

The state health department has placed impacted product still on the farm under seizure and is working with the farm to oversee disposition and corrective action.

Research – Managing Salmonella Enteritidis in commercial chicken flocks

MPI

INTERIM REQUIREMENTS FOR MANAGING SALMONELLA ENTERITIDIS FROM 6 OCTOBER 2022

The Animal Products Order: Emergency Control Scheme – Managing Salmonella Enteritidis in Commercial Chicken Flocks expired on 5 October 2022. After this, we’re using a regulatory framework to manage long-term risks to public health and international trade from Salmonella Enteritidis (SE).

Under the amended Animal Products Regulations 2021, people involved in the commercial chicken supply chain must have a registered Risk Management Programme no later than 1 November 2023. Before this occurs, interim requirements have been established in the Animal Product Notice: Production, Supply and Processing.

Animal Products Regulations 2021 

Animal Product Notice: Production, Supply and Processing [PDF, 2.5 MB]

On 29 June 2022, Cabinet agreed that risk management programmes (RMPs) and monitoring and surveillance programmes will be the regulatory framework. Industry was consulted on proposed options for a long-term regulatory framework from 29 April to 15 May 2022.

Management of Salmonella Enteritidis and Future Food Safety Risk [PDF, 817 KB]

The guidance on this web page will help people involved in the commercial chicken supply chain to comply with the good operating practice, testing and verification requirements of the Animal Product Notice: Production, Supply and Processing (the Notice) in Part JB1 [PDF, 2.5 MB]

The rules apply to all those in the commercial chicken supply chain, including:

  • breeders, hatcheries, and rearers
  • egg producers and broiler meat farms.