Fifty-four lactobacillus strains were differentiated by ribotyping. The stability of ribotypes characteristic of four strains of lactobacilli inhabiting the digestive tract of mice was investigated. One of four isolates of Lactobacillus delbrueckii GT21, which had been associated with mice for 22 months, had an altered ribotype.
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Rodtong et al. (1993) studied this question.
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