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Inhibition mechanism of Listeria monocytogenes by a bioprotective bacteria Lactococcus piscium CNCM I-4031 ArchiMer
Saraoui, Taous; Fall, Papa-abdoulaye; Leroi, Francoise; Antignac, Jean-philippe; Chereau, Sylvain; Pilet, Marie France.
Listeria monocytogenes is a pathogenic Gram positive bacterium and the etiologic agent of listeriosis, a severe food-borne disease. Lactococcus piscium CNCM I-4031 has the capacity to prevent the growth of L. monocytogenes in contaminated peeled and cooked shrimp. To investigate the inhibititory mechanism, a chemically defined medium (MSMA) based on shrimp composition and reproducing the inhibition observed in shrimp was developed. In co-culture at 26°C, L. monocytogenes was reduced by 3-4 log CFU g-1 after 24 h. We have demonstrated that the inhibition was not due to secretion of extracellular antimicrobial compounds as bacteriocins, organic acids and hydrogen peroxide. Global metabolomic fingerprints of these strains in pure culture were assessed by...
Tipo: Text Palavras-chave: Listeria monocytogenes; Lactococcus piscium; Nutrients competition; Cellular contact; Chemically defined medium; Bacterial interaction.
Ano: 2016 URL: https://archimer.ifremer.fr/doc/00250/36123/34677.pdf
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