Bifidobacteria and Microflora
Online ISSN : 1884-5126
Print ISSN : 0286-9306
ISSN-L : 0286-9306
Isolation and Characterization of the Antibiotic-Resistant Strains of Bifidobacterium spp.
Katsuaki MIYAZAKISaburo CHIDAKiyoshi AIKAWANoboru OKAMURARintaro NAKAYA
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1991 Volume 10 Issue 1 Pages 33-41

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Abstract

The strains of Bifidobacterium spp. highly resistant to βAlactams, macrolides, and aminoglycosides were isolated by using the gradient plate and broth culture methods with ampicillin, cephalexin, erythromycin, and kanamycin as selective agents. The biochemical characteristics, cell morphology, and antigenic structure of the mutants were similar to those of their original strains, except for the possession of antibiotic resistance. We think this is the first report on the existence of β -lactam- or macrolide-resistant strains from the genus Bifidobacterium.

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