Large quantities of bacteria colonize the intestines at the time of birth. During the first year of life, they evolve to a relatively stable ecosystem, the normal gut microbiota.
A study comparing intestinal microbiota among almost 100 infants born at Halmstad County Hospital during their first year of life with that of their mothers has provided researchers at the University of Gothenburg with a more detailed understanding of the process.
Inherit fewer bacteria
The collaborative effort with the hospital and researchers in China found that cesarean-born infants inherit fewer bacteria from their mothers than those who have vaginal deliveries.
“More surprisingly, weaning from breast milk appears to have even a great impact on maturation to an adult-like microbiota,” say Professors Fredrik Bäckhed and Jovanna Dahlgren and Sahlgrenska Academy. “The microbiota mature into an adult-like microbiota slower in infants who continue to nurse after starting on solid food at one year of life than those who are weaned completely.”
Potential marker of diseases
The study has contributed to knowledge of how the trillions of bacteria in the human gut may provide amino acids, vitamins and other vital nutrients to the developing infant.
“We have laid the foundation for additional research about the composition of intestinal microbiota as a potential marker for elevated risk of developing various diseases,” Professor Bäckhed says.
The article “Dynamics and stabilization of the human gut microbiome during the first year of life” will appear in Cell Host & Microbe on May 13. The Knut and Alice Wallenberg Foundation and the Swedish research council funded the study.
Link to journal: http://www.cell.com/press
For additional information, feel free to contact:
Fredrik Bäckhed, Professor, Sahlgrenska Academy, and Principal Investigator, Wallenberg Laboratory for Cardiovascular and Metabolic Research, University of Gothenburg
Office +46 31-342 7833
Jovanna Dahlgren, professor och enhetschef för Centrum för Tillväxtforskning på barn, Göteborgs universitet
BY: Krister Svahn