Development of the Chick Microbiome: How Early Exposure Influences Future Microbial Diversity.

Area of Science:

• Animal Science
• Microbiology
• Gut Health

Background:

• Improving animal health via gut health is a long-standing goal in food animal production.
• Recent advancements allow identification of gut microbes linked to enhanced animal performance.
• Limited knowledge exists regarding avian microbiome development and influencing factors.

Purpose of the Study:

• To investigate the development of the chick cecal microbiome from hatch to 28 days.
• To assess the impact of a live Salmonella vaccine and probiotic supplement on the avian microbiome.
• To understand how these gut health interventions influence microbial composition and function.

Main Methods:

• Chicks were monitored from hatch to 28 days of age.
• Cecal microbiome development was analyzed with and without specific live microbial treatments.
• Predicted metagenomic content was used to infer functional changes.

Main Results:

• The chick gut microbiome develops rapidly within the first three days, initially dominated by Enterobacteriaceae.
• Firmicutes increase in abundance and diversity around day 7, with treatment effects becoming more pronounced over time.
• Functional analysis suggested treatment-induced differences by day 14, despite taxonomic differences observed by day 28.

Conclusions:

• Live microbial treatments demonstrably impact the development of bacterial taxa in growing chicks.
• The study highlights significant alterations in the avian microbiome due to Salmonella vaccination and probiotic supplementation.
• Further research is necessary to elucidate the biochemical and functional ramifications of these microbiome modifications.