We report a case of rhombencephalitis infection by Listeria monocytogenes in a 66-year-old man with cirrhosis. The CSF analysis indicated L. monocytogenes as the most likely pathogen. Blood and CSF culture were positive to L. monocytogenes and MRI findings were suggestive of rhomboencephalitis. The treatment was started empirically and then modified when the culture results were available. The ...

The possibility of modeling the cross-contamination of Listeria species, total Listeria monocytogenes, or specific L. monocytogenes strains using a quantitative mathematical model using Monte Carlo simulation techniques is proposed. This article illustrates this approach using 2 different models: one that tracks L. monocytogenes number and prevalence for 4 different strains (Model I) and one th...

The influence of Nisaplin, which contains 2.5% nisin, on the growth of Listeria monocytogenes in Karashi-mentaiko (red-pepper seasoned cod roe) was investigated. The MICs of Nisaplin for L. monocytogenes (10(8) CFU/mL) were measured; seven isolates showed a value of 1,600 microg/mL and one isolate showed a value of 800 microg/mL. All L. monocytogenes isolates had a MIC of 800 microg/mL at 10(6)...

In the present study, a microbiological challenge test in artificially contaminated raw milk Pecorino Umbro cheese during cheese-making was carried out. Raw ewe milk was contaminated by a suspension of particular Listeria monocytogenes strains. The number of L. monocytogenes and L. monocytogenes dynamic growth were evaluated during cheese-making and storage. A significant decrease of the viable...

conclusions based on our study, plca and hlya played a key role in the virulence determination of l. monocytogenes. data analysis also showed that l. monocytogenes could be a causative agent of abortion in pregnant women. results out of 96 samples, 16 isolates of l. monocytogenes by pcr (plca and hlya) and four isolates by culture were identified. there was a significant difference between pcr ...

The contact of T cells to cross-reactive antigenic determinants expressed by nonpathogenic environmental micro-organisms may contribute to the induction or maintenance of T cell memory. This hypothesis was evaluated in the model of murine Listeria monocytogenes infection. The influence of nonpathogenic L. innocua on the L. monocytogenes p60-specific T cell response was analyzed. We show that so...

Listeria monocytogenes is a foodborne pathogen of significant concern to the agricultural and food processing industry because of its ability to grow and persist in cool and moist environments and its association with listeriosis, a disease with a very high mortality rate. Although there have been no listeriosis outbreaks attributed to fresh mushrooms in the United States, retail surveys and re...

Three Lactobacilli were isolated from traditional Tunisian fermented food and then characterized for its ability to inhibit Listeria monocytogenes growth. Antagonistic effect of Lactobacillus plantarum on four L. monocytogenes strains was tested in soft artisanal cheese. Anti-biofilm activity of Lactobacillus extracts was also tested. Our results demonstrate that the selected lactic acid bacter...

Listeria monocytogenes is one of the most heat-resistant non-spore-forming food-borne pathogens and poses a notable risk to food safety, particularly when mild heat treatments are used in food processing and preparation. While general heat stress properties and response mechanisms of L. monocytogenes have been described, accessory mechanisms providing particular L. monocytogenes strains with th...