Natural Variation in Susceptibility of Listeria Strains to Class IIa Bacteriocins |
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Authors: | Saïd Ennahar Neil Deschamps Jean Richard |
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Institution: | (1) Institut National de la Recherche Agronomique, Unité de Recherche Laitière et Génétique Appliquée, F78352 Jouy-en-Josas, France , FR |
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Abstract: | Thirty-one Listeria strains were tested for sensitivity to four class IIa bacteriocins, namely, enterocin A, mesentericin Y105, divercin V41,
and pediocin AcH, and to nisin A. Class IIa bacteriocins displayed surprisingly similar antimicrobial patterns ranging from
highly susceptible to fully resistant strains, whereas nisin A showed a different pattern in which all Listeria strains were inhibited. Particularly, it was observed that the strain Listeria monocytogenes V7 could not be inhibited by any of the class IIa bacteriocins tested. These observations suggest that Listeria strains resistant to the whole range of class IIa bacteriocins may occur in natural environments, which could be of great
concern with regard to the use of these peptides as food preservatives.
Received: 22 October 1999 / Accepted: 15 December 1999 |
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