Bacterial colonization of the large intestine in newborns delivered by cesarean section

Zentralbl Bakteriol Mikrobiol Hyg A. 1987 Oct;266(3-4):330-7. doi: 10.1016/s0176-6724(87)80213-4.


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.

MeSH terms

  • Bacteria, Anaerobic / growth & development*
  • Bacteroides fragilis / growth & development
  • Bottle Feeding
  • Breast Feeding
  • Cesarean Section*
  • Female
  • Humans
  • Infant, Newborn / microbiology*
  • Intestine, Large / microbiology*
  • Pregnancy
  • Staphylococcus / growth & development
  • Streptococcus / growth & development