Inhibition of Listeria monocytogenes by Lactobacillus bavaricus MN in beef systems at refrigeration temperatures
Article Abstract:
Low refrigeration temperatures increased Lactobacillus monocytogenes inhibition, and the addition of glucose-containing gravy and the higher inoculum level of Lactobacillus bavaricus reduced the population of the organism. The three beef systems analyzed for the inhibition of growth of three monocytogenes by the Lactobacillus leavaricus (a meat isolate) were beef cubes, beef cubes in gravy and beef cubes in gravy containing glucose. At 10 degree centigrade, a 10-fold reduction of the pathogens was noticed in all the samples, except in the beef cube without gravy.
Publication Name: Applied and Environmental Microbiology
Subject: Biological sciences
ISSN: 0099-2240
Year: 1993
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Physicochemical characterization of the nisin-membrane interaction with liposomes derived from Listeria monocytogenes
Article Abstract:
A poration mechanism involving the ionization state of histidine residues in the antimicrobial peptide nisin is important for membrane permeabilization. Nisin molecules form pores within the membrane of Listeria monocytogenes liposomes, which contain 5(6)-carboxyfluorescein (CF). An increase in pH increases the leakage of CF from the liposomes. This is due to a decrease in the number of nisin molecules necessary for pore formation. Sub-lethal levels of salt, heat and acid can kill cells. Cells recover from pore formation only during favorable conditions.
Publication Name: Applied and Environmental Microbiology
Subject: Biological sciences
ISSN: 0099-2240
Year: 1996
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Nisin resistance in Clostridium botulinum spores and vegetative cells
Article Abstract:
The nisin resistance in Clostridium botulinum spores and vegetative cells was studied to investigate the stability of the nisin-resistant isolates and the influence of combined hydrogen-ion concentration and sodium chloride in the management of nisin resistance. Results show that most spores from strains were more resistant than vegetative cells. The frequency of colony formation was higher when planting from spore inocula than from a vegetative cell culture.
Publication Name: Applied and Environmental Microbiology
Subject: Biological sciences
ISSN: 0099-2240
Year: 1997
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- Abstracts: Characterization of Listeria monocytogenes isolates by esterase electrophoresis. Characterization of recurrent and sporadic Listeria monocytogenes isolates from raw milk and nondairy foods by pulsed-field gel electrophoresis, monocin typing, plasmid profiling, and cadmium and antibiotic resistance determination
- Abstracts: Detection of Listeria monocytogenes with a nonisotopic polymerase chain reaction-coupled ligase chain reaction assay
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