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Antibiotic Susceptibility of Lactic Acid Bacteria and Bifidobacteria

Formuzul Haque K. M, Yusof R. M., Obidul Huq A.K, Khaleque N.H


Three Lactobacillus (LAB) strains, namely, LAB-3, LAB-11 and LAB-21 (species L. casei) and three Bifidobacteriam (BB) strains, namely, Bifi-11, Bifi-19 and Bifi-20 (species B. infantis) were grown in MRS broth and TPY broth, respectively. They were subjected to susceptibility tests against a range of antibiotics. The isolates were resistant to streptomycin, vancomycin, bacitracin, cephalothine, ceftizoxime, ceftriazon, cloxacillin, clindamycin, cefuroxime, cefuxime and tetracycline and kanamycin but susceptible to ampicillin, amoxicillin and chloramphenicol. With moderate susceptibility to carbencillin and centriazon. The results were compared to a B. infantis ATCC 25962 strain, which showed similar results.

Keywords: S. aureus, Lactobacillus, Antibiotic, microflora

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