Improved medium for selective isolation and enumeration of Bifidobacterium

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Abstract
Petuely''s selective medium for Bifidobacterium was improved by the addition of riboflavin, nucleic acid bases, pyruvic acid and nalidixic acid. The modified medium, when examined under strictly anaerobic conditions for efficient isolation of Bifidobacterium from human fecal samples, exhibited selective and high viable counts that were close to those found on the usual nonselective medium.