Microbiological Control

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Researchers found that the presence of nanoplastic particles can increase the expression of virulence and antimicrobial resistance (AMR) genes in Salmonella, and can also encourage biofilm formation.

In an analysis of domestic refrigerator swabs, researchers discovered complex microbial communities harboring foodborne pathogens and antimicrobial resistance (AMR). The findings also suggested that regular cleaning is possibly more important than temperature control in managing these communities.

The scientists will isolate and identify pathogens like Salmonella enterica and Listeria monocytogenes from Pennsylvania wastewater using whole genome sequencing (WGS), then work with the State Department of Health to connect isolates to foodborne illness outbreaks.

FDA has declared the outbreak over with 48 confirmed and probable cases of illness. A root-cause investigation is still ongoing. FDA has also announced new “Operation Stork Speed” infant formula resources for families.

Arachidonic acid oil (AHA oil) from a Chinese supplier was identified as the source of cereulide toxin contamination in infant formula produced by Nestlé and other well-known brands. Imports of Chinese AHA oil are now subject to stricter EU border checks.

The researchers conducted environmental sampling throughout a controlled environment agriculture (CEA) operation and tested swabs for L. monocytogenes. Boot covers proved to be a useful tool for evaluating the effectiveness of cleaning and sanitation.  

The STEC O26:H11 outbreak sickened 40 people and resulted in 19 cases of hemolytic uremic syndrome (HUS) in children. Dried fruit was the probable vehicle of illness. Researchers underlined the importance of a weight-of-evidence approach in the outbreak investigation.

MagnaFlow is a new automated inline washwater analyzer that provides continuous, real-time visibility into the microbial loads present in post-harvest wash systems.

The SMARTBIOME platform combines high‑resolution DNA sequencing with bioinformatics and data science, an exclusive spoilage knowledge base, and expert consulting services to translate microbiological data into actionable insights.

The research from Oregon State University also found that queso cotija supports L. monocytogenes survival but not growth, and that organic acid surface treatments could inhibit L. monocytogenes growth on queso fresco.