Figure 3.

Proportions of human milk and infant stool bacterial communities estimated to originate from maternal and infant body sites. Each ring represents an (A) individual human milk (n = 33) or (B) infant stool (n = 32) sample. Colors correspond to the relative amount (%) of amplicon sequence variants (ASVs) predicted to come from the body site of the corresponding color. Contributions were estimated using SourceTracker2 and two methods of FEAST. FEAST—Individual results were estimated using different groups of source samples for each sink (human milk or infant stool); contributions were only estimated from samples within the same dyad. FEAST—Group results were estimated using the same group of source samples for each sink sample (human milk or infant stool); contributions were estimated from all samples within a given body site. HM, human milk; SK, breast skin; ISa, infant saliva; MSa, maternal saliva; MSt, maternal stool.