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Microbiome Changes in Layer Pullets Reared in Floor Pens along the Growth Period
Hee-Jin Kim1, Hyun-Soo Kim1, Yeon-Seo Yun1
1Poultry Research Institute, National Institute of Animal Science, Rural Development Administration, Pyeongchang 25342, Republic of Korea.
Life (Basel, Switzerland)
|December 23, 2023
Summary
The gut microbiome in young chickens (pullets) changes significantly as they grow. Researchers tracked ileum and cecum bacteria, finding increased diversity by 18 weeks, which can guide better poultry nutrition strategies.
Area of Science:
- Animal Science
- Microbiology
- Gut Health Research
Background:
- The gastrointestinal tract microbiome plays a crucial role in nutrient absorption, immune function, and host development.
- Understanding the dynamic changes in the gut microbiota during early life stages is vital for poultry health and productivity.
Purpose of the Study:
- To characterize the developmental trajectory of the ileum and cecum microbiota in pullets from hatching to 18 weeks of age.
- To analyze the impact of rearing period on gut microbiome composition and diversity in growing pullets.
Main Methods:
- Growth performance and intestinal microbiome analysis (ileum and cecum) were conducted at 1, 5, 11, and 18 weeks of age.
- Alpha diversity (richness) and beta diversity (community structure) of bacterial communities were assessed using various metrics.
Main Results:
- Bacterial community richness (alpha diversity) in both ileum and cecum was significantly higher in 18-week-old pullets compared to 1- and 5-week-old pullets.
- Ileum microbiota showed distinct age-related clustering (beta diversity), while cecum microbiota did not exhibit clear separation across age groups in weighted UniFrac analysis.
Conclusions:
- Pullet gut microbiota undergoes significant variation and diversification throughout the rearing period.
- These findings provide valuable insights for developing targeted nutritional strategies to enhance gut health and improve pullet development.
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