Microbiological Control

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The agency has published a summary of foodborne illness outbreak investigations involving USDA-regulated products in Fiscal Year (FY) 2025, alongside an after-action review of a fatal listeriosis outbreak linked to Yu Shang-brand ready-to-eat (RTE) meats that was solved in 2024.

The information gathered will be used to support FAO/WHO scientific advice intended to inform future Codex Alimentarius discussions on frozen food handling guidance.

Ready-to-eat (RTE) pâté en croute contaminated with Listeria monocytogenes and produced by Drôme Ardèche Tradition has sickened 12 people across France, resulting in two deaths. All patients were hospitalized.

The Achyut Adhikari Research Group is conducting several projects focused on preventive, FSMA-aligned strategies to reduce microbiological risks during pre-harvest and processing of produce, including hydroponic production, manure fertilizer treatment, food-contact surface sanitation, and antimicrobial packaging development.

The platform uses a DNAzyme-crosslinked hydrogel that produces a visible color change when E. coli is present, enabling equipment-free, point-of-use detection. It successfully detected E. coli in a range of foods, even when other pathogens were present.

This article examines the frequent contamination of fresh produce (e.g., cucumber and sprouts due to recent outbreaks linked to these foods) with Salmonella and Shiga toxin-producing Escherichia coli.

Providing evidence for potential Produce Safety Rule standards, the assessment examined how pathogens survive in untreated biological soil amendments of animal origin (BSAAO) and contaminate produce. FDA found that longer time between BSAAO application and harvest significantly reduces crop contamination.

The Infant Formula Safety Modernization Act includes provisions about expanded pathogen testing requirements and compulsory environmental monitoring for infant formula manufacturers, among other mandates.

Despite having Listeria-positive samples that matched the outbreak strain via whole genome sequencing (WGS), which prompted an FDA Import Alert and a company recall for the suspected vehicle of illness, FDA did not disclose the specific product or any of the firms implicated.

Elevated levels of certain metals and the presence of commonly used disinfectants were found to inactivate Salmonella vaccines administered to poultry via drinking water.