ELENA RUSU, IONELA SARBU, CRISTINA CRISTESCU, BOGDAN IOAN COCULESCU, STEFANA PETRUT, ANDREI MURESAN, TATIANA VASSU, DIANA PELINESCU<br>Highlighting the Antimicrobial Activity of Organic Compounds <br>Isolated from Some Strains of Lactic Acid Bacteria

ELENA RUSU, IONELA SARBU, CRISTINA CRISTESCU, BOGDAN IOAN COCULESCU, STEFANA PETRUT, ANDREI MURESAN, TATIANA VASSU, DIANA PELINESCU
Highlighting the Antimicrobial Activity of Organic Compounds
Isolated from Some Strains of Lactic Acid Bacteria

Abstract:

One of the beneficial features exerted by the lactic acid bacteria is represented by their ability to produce a large variety of compounds with antimicrobial activity against some strains of bacteria, yeasts and fungi. Among these compounds we encounter both metabolites acting as inhibitors of microbial growth and metabolites with microbicidal effect. The primary objective of this study was to determine the antimicrobial activity of some lactic acid bacteria strains against pathogenic or potentially pathogenic bacterial strains, as well as the correlation of antimicrobial activity with the biosynthesis of organic compounds. The results achieved showed that two strains secrete bacteriocins and organic acids which have antimicrobial activity especially against pathogenic strains belonging to Listeria (L.) monocytogenes and Bacillus (B.) cereus. Bacteriocins produced by the two tested strains belonging to Lactobacillus (L.) hamsteri and Lactococcus (L.) lactis species produced inhibition areas of the tested pathogenic strains, the most pronounced antimicrobial activity was recorded with the L. lactis strain. Keywords: lactic bacteria, antimicrobial, organic compounds

Issue: 2016, Volume 67, Issue 12

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