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Study Says Babies' First Bacteria Depend on Birthing Method
The study, led by the University of Puerto Rico and involving the University of Colorado at Boulder and two Venezuelan institutes, showed that babies delivered vaginally had bacterial communities resembling their mother's vaginal bacteria, while Caesarian section newborns had common skin bacterial communities. Researchers believe many of the different microbial communities residing on humans -- each of which is personally unique -- may help protect individuals from various diseases.
The new findings establish an important baseline for tracking the succession of bacterial communities on babies and their associated effects on human health, said co-lead study author Maria Dominguez-Bello of the University of Puerto Rico.
The new study appears in the June 21 issue of the Proceedings of the National Academy of Sciences. Former CU-Boulder researcher Elizabeth Costello, now at Stanford University, was co-lead author on the study. Co-authors included CU-Boulder Assistant Professor Noah Fierer, CU-Boulder Assistant Professor Rob Knight, Monica Contreras of the Venezuelan Institute for Scientific Research and Magda Magris of the Amazonic Center for Research and Control of Tropical Diseases in Venezuela.
Dominguez-Bello said the bacterial communities of C-section babies were dominated by species from the Staphylococcus genus, most of which are harmless but a few of which can cause severe infections. "These differences we are seeing in this study might be related with increased health risks in C-section babies, although more research is needed," she said.
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