Microbial community diversity in the feces of mouse pups from the C and U groups at 15, 22, and 36 d of age. Shannon diversity index (A) and richness defined as the number of unique OTUs per sample (B); the x axes depict time since ending FD; n = 8 mice/group. *,***Different from C: *P < 0.05, ***P < 0.001. C, control mice; FD, feed deprivation; OTU, operational taxonomic unit; U, mice undernourished from 5 to 15 d of age.