Fig. 3. Clustering of bacterial composition in hindmilk and infant’s feces.

Heatmap of relative abundances of major genera (>1% average relative abundance in either milk or feces) detected in hindmilk and infant’s feces. Samples cluster according to sample type, A infant’s feces and B hindmilk. Genera cluster into (1) bacterial genera common to both sample types, (2) bacterial genera most common to hindmilk samples, and (3) bacterial genera most common to infant’s fecal samples. Orange; infant’s feces at infant age 5 months, dark-red; infant’s feces at infant age 9 months, light-blue; maternal hindmilk at infant age 5 months, dark-blue; maternal hindmilk at infant age 9 months.