Evaluation of technological properties of Leuconostoc mesonteroides (V1) strain isolated from Algerian goat’s milk

摘要

This study was to evaluate probiotic characteristics by in vitro tests of Leuconostoc mesonteroides strain (V1) isolated from Algerian goat’s milk collected from El Bayadh which is located in the west of Algeria. This strain V1 were identified by phenotypic and biochemical methods, were tested for their antimicrobial activity against Staphylococcus aureus, Listeria innocua, Listeria ivanovii and was evaluated for certain properties relevant to probiotic including : acid pH, bile salts, pepsin resistance, hemolytic activity and antibiotics sensitivity. The results revealed the strain V1 showed antagonistic activity against Staphylococcus aureus, Listeria innocua and Listeria ivanovii, due to a production of proteinous nature substances.The strain were resistant to pH 3 and 4, bile salts at 0.5%, 1% and 2% and pepsin at pH 3. Was γ-hemolytic and was susceptible to four antibiotics : Chloramphenicol, pristinamycin, Clindamycin and Licomycin. Leuconostoc mesonteroides strain V1 showed desirable properties as potential probiotic strains, which can be considered the strain V1 as suitable probiotic candidate.