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Dynamics of gut colonization and source of intestinal flora in healthy newborn infants

Terhi Tapiainen1, Samuli Ylitalo, Erkki Eerola

  • 1Department of Pediatrics, University of Oulu, Oulu, Finland.

APMIS : Acta Pathologica, Microbiologica, Et Immunologica Scandinavica
|November 3, 2006
PubMed

Insights

Infant gut colonization rapidly changes in the first days of life. Bacterial flora in newborns initially resembles mothers and nurses, with this similarity increasing over time.

Area of Science:

  • Microbiology
  • Infant Health
  • Gut Microbiome Dynamics

Background:

  • The early development of the infant gut microbiome is crucial for health.
  • Understanding the sources and dynamics of initial bacterial colonization is essential.

Purpose of the Study:

  • To quantitatively evaluate the dynamics of gut colonization in infancy.
  • To identify the primary sources of intestinal bacterial flora in newborns.

Main Methods:

  • Utilized computerized analysis of bacterial cellular fatty acid (CFA) profiles.
  • Analyzed 159 stool samples from 10 healthy newborns (first week and 6 months).
  • Compared infant flora profiles with samples from mothers and nurses using gas-liquid chromatography.

Main Results:

  • Infant gut colonization showed significant hour-to-hour fluctuations in the perinatal period.
  • Bacterial CFA profiles in newborns initially resembled those of their mothers and nurses.
  • This resemblance intensified by 6 months of age.

Conclusions:

  • Maternal flora's influence on initial gut colonization may be less than anticipated.
  • The fecal flora of infants is shaped by both maternal and primary caregiver (nurse) influences.
  • Early gut microbiome development is a dynamic process influenced by multiple environmental sources.

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