SURVEYING ANTIBACTERIAL AND ANTIBIOTIC ACTIVITY OF SOME PROBIOTIC STRAINS
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Abstract
Background: Probiotic products are becoming widely consumed. However, their quality has not been controlled strictly. Probiotic strains must have standards of safety, antibiotic resistance and antimicrobial ability. Objectives: The objective of this paper is surveying antibacterial and antibiotic resistance activity of isolated probiotic and applying for isolated probiotic in sơme products. Materials and methods: 16 isolated strains of Lactobacillus, Bifidobacterium, Bacillus, Streptococcus and Enterococcus were surveyed antibacterial activity (cross streak method and agar well diffusion method), antibiotic resistance property (Agar disk diffusion, Agar dilution and ATB ANA test of bioMérieux). Results: The results showed that 14 out of 16 isolated strains are able to inhibit common pathogenic bacteria, strong antagonistic effect is usually caused by bacteria of LAB (lactic acid bacteria). Bacillus strains are also resistant to Gram positive pathogens but less resistant than experimental LAB. Most probiotic surveyed are susceptible to common antibiotics, in spite of some resistant cases. Conclusion: In this survey, most strains of probiotic products had required beneficial properties.
Article Details
Keywords
antibacterial, activity, antibiotic, probiotic, resistant
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