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Journal Articles Probiotics and Antimicrobial Proteins Year : 2013

Partial Characterization of Bacteriocins Produced by Two New Enterococcus faecium Isolated from Human Intestine

Abstract

This study aimed at characterizing two novel bacteriocin-producing enterococcal strains isolated from human intestine. A total of 200 lactic acid bacteria were isolated from a woman stool sample. Two of them were selected for characterization due to their high antimicrobial activity against five strains of Listeria monocytogenes. The selected bacteria were identified as two different strains of Enterococcus faecium and designated MT 104 and MT 162. The bacteriocins produced by MT 104 and MT 162 were stable at different pH ranging from 2 to 11 and were active after different treatments such as heat, enzymes, detergents, and γ-irradiation. The two isolated strains exhibited some probiotic properties such as survival in simulated gastric fluid and intestinal fluid, lack of expression of bile salt hydrolase or hemolytic activity, adhesion to Caco-2 cells efficiently, and sensitivity to clinical antimicrobial agents. Thus, the two isolated strains of E. faecium could become new probiotic bacteria and their bacteriocins could be used for controlling L. monocytogenes in combination with irradiation for food preservation
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Dates and versions

pasteur-01133563 , version 1 (19-03-2015)

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Mélanie Turgis, Khanh Dang Vu, Monique Lacroix. Partial Characterization of Bacteriocins Produced by Two New Enterococcus faecium Isolated from Human Intestine. Probiotics and Antimicrobial Proteins, 2013, 5 (2), pp.110-120. ⟨10.1007/s12602-013-9129-z⟩. ⟨pasteur-01133563⟩

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