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Bacterial colonization of the large intestine in newborns delivered by cesarean section
C Neut1, E Bezirtzoglou, C Romond
1Université de Lille II, Faculté de Pharmacie, France.
Insights
Cesarean section delivery impacts newborn gut bacteria, leading to slower colonization by beneficial strict anaerobes and Bifidobacteria compared to vaginal birth. Breastfeeding promotes faster, but less diverse, initial gut flora development.
Area of Science:
- Microbiology
- Neonatal Health
- Gastroenterology
Background:
- Gut microbiota colonization begins at birth.
- Mode of delivery significantly influences initial bacterial colonization.
- Infant feeding practices (breast vs. bottle) affect gut flora composition.
Purpose of the Study:
- To investigate the early-life gastrointestinal tract bacterial colonization patterns in newborns delivered via Cesarean section.
- To compare the gut microbiota development between Cesarean-delivered and vaginally-delivered infants.
- To assess the impact of feeding method on neonatal gut flora.
Main Methods:
- Analysis of bacterial colonization in the gastrointestinal tract of newborns.
- Comparison of microbial communities based on delivery mode (Cesarean vs. vaginal).
- Evaluation of the influence of feeding type (breast milk vs. formula).
Main Results:
- Cesarean section delivery resulted in delayed colonization by strict anaerobes and members of the Bacteroides fragilis group.
- Bifidobacteria were sporadically isolated in Cesarean-delivered infants within the first 14 days.
- Breast-fed infants showed more rapid initial colonization, while formula-fed infants exhibited greater microbial diversity.
- Facultative anaerobes were predominant in the early weeks of life for Cesarean-delivered newborns.
Conclusions:
- Cesarean section significantly alters the early colonization patterns of the neonatal gut microbiome.
- The gut microbiota of Cesarean-delivered infants shows a distinct profile with reduced anaerobe abundance compared to vaginally-delivered infants.
- Feeding practices play a crucial role in modulating the developing gut microbiome in early infancy.
Abstract:
Colonization of the gastrointestinal tract in newborns delivered by Cesarean section occurs during the first days of life by bacteria provided by the environment. It is more rapid in breast-fed infants than in bottle-fed babies. The intestinal flora is more diversified if the infants receive formula feeding. The first bacteria encountered are facultative anaerobes; they remain predominant during the first two weeks of life. In comparison to vaginal delivery, there were low levels of strict anaerobes after Cesarean section; members of the Bacteroides fragilis group were still completely lacking after 14 days of life and Bifidobacteria were only isolated sporadically.