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- Title
IN VITRO PROBIOTIC CHARACTERISTICS OF ENTEROCOCCUS SPECIES ISOLATED FROM RAW COW MILK.
- Authors
Elkenany, Rasha M.; Elsayed, Mona M.; Eltaysh, Rasha A.; Zakaria, Amira I.; El-Baz, Amira H.
- Abstract
The objective of this investigation was to isolate, identify and to estimate probiotic characteristics of enterococci recovered from raw cow milk by the detection of antimicrobial activity against potential pathogens, antibiotics susceptibility and possible virulence genes (esp, cylA and hyl). Forty-eight enterococci strains recovered from raw cow milk were phenotypically and genotypically identified. Among 48 of enterococci isolates, twenty-two strains (19 E. faecalis, 1 E. faecium, and 2 E. gallinarum) were strongly tolerant to low pH and bile salts but with a variable level of resistance. Most of the isolates showed inhibitory activity against Salmonella Typhimurium, Salmonella Enteritidis, Escherichia coli and Staphylococcus aureus. Only E. faecium strain and one isolate of E. gallinarum showed antimicrobial activity against Listeria monocytogenes. Antimicrobial activity was not observed against Shigella species. All strains demonstrated high susceptibility to imipenem, vancomycin, ciprofloxacin and cefotaxime and lower resistance level to other tested antibiotics except E. faecalis strains that were the most resistant ones to ampicillin, trimethoprimsulfamethoxazole, tetracycline and clindamycin. The esp gene was only positive for all E. faecalis strains. The cylA and hyl genes were negative for all isolates. These results proposed that such strains could be considered good probiotic candidates and so further studies for their health benefits are recommended.
- Publication
International Journal of Probiotics & Prebiotics, 2018, Vol 13, Issue 2/3, p117
- ISSN
1555-1431
- Publication type
Academic Journal