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The differentiation of Bifidobacterium species was performed with specific primers using the PCR technique, the amplified ribosomal DNA restriction analysis (ARDRA) technique based on reports on the sequence of the 16S rRNA gene and speciation based on a short region of the ldh gene. Four specific primer sets were developed for each of the Bifidobacterium species, B. animalis, B. infantis and B. longum...
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