Comparison of the fecal microbiota with high- and low performance race horses.

This research investigates the link between the diversity of gut bacteria in horses and their athletic performance, showing that high-performance horses maintain a more diverse bacterial community compared to their low-performance counterparts.

Objective of the Study

• The research aimed at evaluating the correlation between the gut microbiota (intestinal bacteria) and fitness in horses. Specifically, the authors sought to analyze and compare the diversity of gut microbiota in high-performance and low-performance racehorses to understand their influence on athletic performance.

Methods Employed in the Study

• The study employed the sequencing of the V3 and V4 hypervariable regions of the partial 16S rRNA genes taken from horse fecal samples. This method allows for the characterization and comparison of the fecal microbiota in the two performance categories of horses involved in the study; high- and low-performing Jeju horses and Thoroughbreds.
• The researchers analyzed forty-nine fecal samples, which they split into four groups: high-performance Jeju horses (HJ, n = 13), low-performance Jeju horses (LJ, n = 17), high-performance Thoroughbreds (HT, n = 9), and low-performance Thoroughbreds (LT, n = 10). The four groups facilitated a comprehensive evaluation and comparison of the bacterial community in the different performance categories.

Key Findings of the Study

• The high-performance racehorse groups, both Jeju and Thoroughbred, exhibited a greater diversity of bacteria in their gut community than the low-performance counterparts. The diversity of gut microbiota is considered beneficial for the overall gut health and nutrient absorption, which influences the performance of the horses.
• The gut microbiota of the low-performance horses seemed to be dysbiotic (imbalance or maladaptation of the microbiota) and showed two common metabolic activities associated with fatigue – tryptophan and succinate syntheses.
• In contrast, the high-performance horses’ gut microbiota depicted an enriched production of polyamines, butyrate, and vitamin K. These compounds contribute to enhanced gut health and are associated with better physical performance.

Conclusion of the Study

• The findings suggest that the composition and diversity of the gut microbiota could influence the racing performance of Jeju horses and Thoroughbreds in Korea. The discoveries could lead to new strategies to enhance horse performance and health by tailoring diets to promote beneficial gut bacteria.