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Development of the equine gut microbiota.

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The equine gut microbiota stabilizes within 50 days postpartum, with fiber-fermenting species dominating. Weaning had minimal impact on the gut microbial composition in foals.

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Area of Science:

  • Microbiology
  • Animal Science
  • Gastroenterology

Background:

  • Mammalian gut microbiota development is crucial for health.
  • Early life microbial colonization influences immune system development, including oral tolerance.
  • Understanding equine gut microbiota is vital for foal health and nutrition.

Purpose of the Study:

  • To investigate the developmental trajectory of the equine gut microbiota from birth to post-weaning.
  • To identify key microbial shifts and stability points during early foal development.
  • To assess the impact of weaning on gut microbiota composition and host immune markers.

Main Methods:

  • Longitudinal sampling of gut microbiota in ten foals from parturition to post-weaning.
  • 16S rRNA gene sequencing for microbial composition analysis.
  • Gene expression analysis of cytokines in blood samples.

Main Results:

  • Significant differences in core gut microbiota species were observed between Day 7 and Day 20 postpartum.
  • Fiber-fermenting species increasingly dominated the microbiota between Day 20 and Day 50.
  • Relative microbial stability was achieved by 50 days postpartum, with no significant changes post-weaning.
  • No significant changes in pro- and anti-inflammatory cytokine gene expression were detected before and after weaning.

Conclusions:

  • The equine gut microbiota undergoes rapid development and stabilization within the first 50 days of life.
  • Weaning appears to have a limited impact on the established gut microbial composition in foals.
  • Early life microbial colonization patterns may influence long-term equine gut health.