Effect of administration of bifidobacteria on intestinal microbiota in low-birth-weight infants and transition of administered bifidobacteria: a comparison between one-species and three-species administration.

The effects of administration of bifidobacteria on the intestinal microbiota in low-birth-weight infants, and the transition of each strain of administered bifidobacteria were investigated. A single strain of Bifidobacterium breve M-16V (5 × 10(8); one-species group) or a mixture of three species composed of B. breve M-16V, Bifidobacterium longum subsp.