Breastmilk Feeding Practices Are Associated with
the Co-Occurrence of Bacteria in Mothers’ Milk and
the Infant Gut: the CHILD Cohort Study

Highlights
– Breastfeeding exclusivity and duration strongly influence infant gut microbiota
– A few bacterial species co-occur in mothers’ milk and their infants’ stool
– This co-occurrence is reduced when breastmilk is pumped and fed from a bottle
– Bacteria in breastmilk contribute to overall infant gut microbiota composition