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Birthing method dramatically impacts babies’ gut bacteria

19/09/2019

The method via which a baby is born has a dramatic impact on its gut bacteria and could explain why babies born by Caesarean section are more likely to experience health problems later in life, a new study has found. The study by Wellcome Sanger Institute, UCL, and the University of Birmingham – the largest of its kind – looked at babies’ microbiomes (the bacteria, viruses and fungi that live in our guts) to see if they formed differently depending on how a baby was born. For the research, samples were taken on a regular basis from the nappies of 600 babies in their first month of life. The results showed that vaginally born babies got most of their first bacteria from their mothers. However, babies born via Caesarean section showed high levels of hospital bugs, with some having as much as 30% of their total microbiomes made up by such bugs. It’s a reality that could explain why babies born by Caesarean section are more susceptible to certain conditions when they are older, like allergies, asthma and type 1 diabetes. Speaking about the findings of the research, Dr Trevor Lawley, from the Wellcome Sanger Institute, said: “What surprised me and scared me was the amount of healthcare bugs showing up in these children. “But what excites me is we have an amazing body of data now that we can build on, to think about how to properly establish the human ecosystem, starting at birth.”

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