Fig. 1.

Trade-off between the abundances of bifidobacteria and Bacteroides in the gut of breastfed infants: the gut microbial community of infants in Bangladesh (adapted from Huda et al. [4]). Samples in rows are clustered by microbiome euclidean distance using a complete agglomeration method. Samples are colored in each column according to the relative abundance of the microbe on the x-axis label in that sample (1 = 100% abundance). Bifidobacteria dominate the gut microbiome of most infants and appear to be mutually exclusive with Enterobacteriaceae and Bacteroidaceae.