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Environmental Microbiology

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Vol 16 (12 Issues in 2014)
Edited by: Kenneth N. Timmis, Michael Wagner, Mike Jetten, Victoria Orphan, Martin Polz, Paola Bonfante, Jack A. Gilbert, Rachel Whitaker, and Juan L. Ramos
Print ISSN: 1462-2912 Online ISSN: 1462-2920
Published on behalf of Society for Applied Microbiology
Impact Factor: 6.24

12:00 AM EDT August 22, 2013

Breast is Best: Good Bacteria Arrive From Mum’s Gut via Breast Milk

Scientists have discovered that important ‘good’ bacteria arrive in babies’ digestive systems from their mother’s gut via breast milk.

Although this does confirm that when it comes to early establishment of gut and immune health, ‘breast is best’, a greater understanding of how babies acquire a population of good bacteria can also help to develop formula milk that more closely mimics nature.

The study, published today (22 August) in Environmental Microbiology, which is a journal of the Society for Applied Microbiology (SfAM), was led by Professor Christophe Lacroix at the Institute for Food, Nutrition and Health, ETH-Zurich, Switzerland.

Professor Lacroix said “We are excited to find out that bacteria can actually travel from the mother’s gut to her breast milk.

“A healthy community of bacteria in the gut of both mother and baby is really important for baby’s gut health and immune system development.”

The Zurich team found the same strains of Bifidobacterium breve and several types of Clostridium bacteria, which are important for colonic health, in breast milk, and maternal and/or neonatal faeces. Strains found in breast milk may be involved in establishing a critical nutritional balance in the baby’s gut and may be important to prevent intestinal disorders.

Professor Lacroix continued “We’re not sure of the route the bacteria take from gut to breast milk but, we have used culture, isolation, sequencing and fingerprinting methods to confirm that they are definitely the same strains.”

Future research will hopefully complete the picture of how bacteria are transferred from mother to neonate. With a more thorough knowledge, we can decide which bacterial species will be most important as probiotics in formula. But until then, for neonates at least, the old adage is true, breast is best.