Total number of 150 samples comprising of raw-vegetables and raw-meats were obtained from three different markets: Ose market, Ochanja market and Main-market all in Onitsha metropolis, Anambra State, Nigeria. These samples were analyzed bacteriologically for Listeria monocytogenes using a selective and differential media chromagar Listeria. Out of the total number of 150 samples studied, result...

Infection due to Listeria monocytogenes mostly effects immunocompromized hosts (1,2). Although, viruses usually cause encephalitis and bacterial infections are associated with meningeal inflammation, Listeria monocytogenes is one of the few bacterial microorganisms that may present as a meningoencephalitis and most frequently as a rhombencephalitis (1,2). Listeria rhombencephalitis causes respi...

Listeriosis in human is clinically characterized as perinatal listeriosis, neonatal listeriosis and adult listeriosis. Listeria spp are an established pathogen in animals, and human infections are usually seen following ingestion of contaminated food (processed food). Human infections of Listeria spp initially present with gastrointestinal symptoms. Meningitis, septicaemia, brain abscess and pr...

NMRI mice were experimentally infected with Listeria monocytogenes serotypes 1/2b, 3a, 4b, and 4d and Listeria innocua serotype 6b by different means. The course of infection was monitored, using bacteriological and histological methods. The following typical features of experimental infection with the various L. monocytogenes and L. innocua serotypes were observed. (i) On the basis of the mean...

Here, we report the draft genome sequences of three Listeria monocytogenes isolates from fresh leaves collected in Nigeria, belonging to sequence types ST5 and ST155 (sublineages SL5 and SL155, respectively).

Characterization of Listeria monocytogenes Peptidoglycan N-Deacetylase and OAcetylase Mutations and the Role of Lysozyme Resistance During Infection

CD8 T cells are effective mediators of specific immunity to infection by Listeria monocytogenes, a bacterial pathogen that initially infects macrophages in the spleen and liver and subsequently spreads to hepatocytes and unidentified parenchymal cells in the spleen. To identify the in vivo target cells of L. monocytogenes-immune CD8 T cells, adoptive transfer assays were performed with bone mar...

Aerosol studies of Listeria monocytogenes in food processing plants have been limited by lack of a suitable surrogate microorganism. The objective of this study was to investigate the potential of using green fluorescent protein-labeled strains of Listeria innocua as a surrogate for L. monocytogenes for aerosol studies. These studies were conducted in a laboratory bioaerosol chamber and a pilot...