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Prevalence, molecular characterization, antibiotic resistance, and investigation of transmission pathways of Listeria monocytogenes strains isolated along the beef production chain.
Food Microbiol
August 2025
Laboratory of Animal Food Products Hygiene-Veterinary Public Health, Aristotle University of Thessaloniki, 54124, Thessaloniki, Greece. Electronic address:
Listeria monocytogenes, the leading cause of fatalities among foodborne pathogens, exhibits remarkable resilience in food industry environments. This study aims to isolate and characterize L. monocytogenes strains along the beef production chain of a vertically integrated industry.
View Article and Find Full Text PDFModeling the impact of between-lot and within-lot variability in Listeria monocytogenes contamination on risk reduction from sampling ready-to-eat foods.
J Food Prot
March 2025
Human Foods Program, U.S. Food and Drug Administration, 5001 Campus Drive, College Park, MD 20740 USA.
Microbiological sampling and testing are widely utilized in food safety risk management. We developed risk assessments to quantify the impact of various sampling plans on the risk of invasive listeriosis to consumers. We used the FDA-iRISK® tool and adapted available process, consumption, and dose response modules of published L.
View Article and Find Full Text PDFWhole-genome sequencing-based characterization of Listeria monocytogenes isolated from cattle and pig slaughterhouses.
Infect Genet Evol
March 2025
Foot-and-Mouth Disease Research Division, Animal and Plant Quarantine Agency, Gimcheon 39660, Republic of Korea. Electronic address:
Listeria monocytogenes is a foodborne pathogen that causes human listeriosis and may be transmitted to humans via the food chain, beginning at slaughter and extending through food production and consumption. In this study, we performed whole-genome sequencing (WGS) analysis to determine the genetic characteristics of L. monocytogenes from the carcasses and environments of cattle and pig slaughterhouses in Korea.
View Article and Find Full Text PDFIntravacuolar persistence in neutrophils facilitates spread to co-cultured cells.
mBio
March 2025
Division of Neurological Sciences, NeuroCenter, Vetsuisse Faculty, University of Bern, Bern, Switzerland.
Unlabelled: The bacterium () causes listeriosis in humans and ruminants. Acute lesions are predominantly infiltrated by polymorphonuclear neutrophils (PMNs), considered to be the efficient bactericidal arm of innate immunity. However, recent evidence suggests that PMNs cannot achieve antilisterial sterilizing immunity and that may persist within PMNs.
View Article and Find Full Text PDFMonitoring cellular dynamics upon infection using a holotomography-based approach.
Methods Cell Biol
March 2025
Department of Clinical and Molecular Sciences, Marche Polytechnic University, Ancona, Italy; Advanced Technology Center for Aging Research, IRCCS INRCA, Ancona, Italy. Electronic address:
Many intracellular bacteria interfere with mitochondrial dynamics or target other organelles, thereby inducing a specific cellular response that could emerge as a strategy of the pathogen to ensure its survival, or as a form of defense employed by the host cell to restrict dissemination. In this context, the concomitant monitoring of both pathogen migration and (intra)cellular dynamics in live cells emerges as a pivotal aspect for the comprehension of the infection sequence and to visualize the pathogen-mediated remodeling that could occur to the entire cellular system. Holotomographic microscopy can be used to achieve this goal, allowing the simultaneous analysis of both bacterial movement and intracellular alteration for extended periods of time, with high spatial resolution and avoiding side-effects due to phototoxicity.
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