Hemolytic activity reevaluation of putative nonpathogenic Listeria monocytogenes strains
Article Abstract:
A horse blood agar plate reevaluates the hemolytic capability of nonpathogenic Listeria monocytogenes strains. Seven of the twelve strains are hemolytic and confirmed as L. monocytogenes with the help of the API Listeria system and the Gene-Trak L. monocytogenes-specific colorimetric DNA hybridization. Except for one strain, all hemolytic strains form rough colonies on a selective medium. The rest of the strains are nonhemolytic and have been identified as L. innocua. All nonhemolytic strains except for one form smooth colonies on lithium chloride-ceftazidime agar.
Publication Name: Applied and Environmental Microbiology
Subject: Biological sciences
ISSN: 0099-2240
Year: 1996
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Changes in cell morphology of Listeria monocytogenes and Shewanella putrefaciens resulting from the action of protamine
Article Abstract:
A study was conducted to determine the impacts of salmon protamine on cell morphology, cell wall and cytoplasmic constituents of Listeria monocytogenes and Shewanella putrefaciens. TRansmission immunoelectron microscopy and atomic force microscopy were used to evaluate the effects. Protamine was found to disrupt the outer surface structure and condensed the cytoplasm of sensitive cells. It was also observed to change membrane structures in sublethal concentrations, consequently eliminating respiration.
Publication Name: Applied and Environmental Microbiology
Subject: Biological sciences
ISSN: 0099-2240
Year: 1996
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Pyrosequencing as a method for grouping of Listeria monocytogenes strains on the basis of single-nucleotide polymorphisms in the inlB gene
Article Abstract:
Researchers allocated 106 strains of Listeria monocytogenes into four groups depending on the nucleotides at positions 1575 and 1578 of the inlB gene. One group consists of strains of serovars 1/2a and 1/2c, one consists of strains of serovars 1/2b and 3b, and two groups consist of strains of serovar 4b. The inlB gene codes for a protein involved in the uptake of L. monocytogenes in liver cells.
Publication Name: Applied and Environmental Microbiology
Subject: Biological sciences
ISSN: 0099-2240
Year: 2001
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