National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692 Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
This study aimed to assess the antibiotic susceptibility of Lactobacillus strains of goat milk origin. Lactobacilli are generally recognized as safe, but can act as reservoir for genes carrying antibiotic resistance traits; which can further spread to commensal, food spoilage or pathogenic organisms. Lactic acid bacteria (LAB) strains coming from animal sources had significant interaction with antibiotics. Goat milk, being second to cow milk in production and due to its close resemblance to human milk composition, is among favorable source for isolating potential probiotic LAB strains. Herein, this study assessed the antibiotic susceptibility pattern of fourteen Lactobacillus strains isolated from goat milk. The antibiotic susceptibility was recorded against thirty antibiotics following standard disk-diffusion assay. Imipenem, meropenem and nitrofurantoin turned out to be the most effective antibiotics, displaying high zone of inhibition (ZOI) against all the isolates. In contrast, all lactobacilli strains exhibited resistance pattern towards methicillin, oxacillin, cefoxitin, cefmetazole, teicoplanin, vancomycin, ciprofloxacin, ofloxacin, streptomycin, tobramycin, clindamycin and fusidic acid group antibiotics. Overall, GM4 (L. plantarum) displayed highest resistance with clear resistance phenotype against 18/30 antibiotics tested and intermediate resistance against other 5 antibiotics. This study generates new data pertaining to the antibiotic resistance risk of new candidate probiotic strains from goat milk.
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