Microbial events in the hindgut during carbohydrate-induced equine laminitis.
Authors: G. Milinovich, A. Klieve, C. Pollitt, D. Trott
Journal: The Veterinary clinics of North America. Equine practice
Summary
# Microbial Events in the Hindgut During Carbohydrate-Induced Equine Laminitis Carbohydrate overload has long been implicated in laminitis, yet the precise microbial mechanisms triggering this devastating condition remained poorly understood until advances in DNA profiling techniques enabled detailed analysis of hindgut microbiota. Milinovich and colleagues used experimental laminitis models combined with molecular microbiology methods to track microbial population shifts following carbohydrate challenge, identifying streptococcal species as the primary microbial drivers of disease initiation. Their findings demonstrate that specific streptococci proliferate rapidly in response to excess carbohydrate availability, generating metabolic byproducts that destabilise hindgut physiology and initiate the pathophysiological cascade leading to lamellar failure. Whilst the research stops short of definitively establishing causation, it provides a robust foundation for understanding how dietary mismanagement translates into acute laminitis at the microbial level. For practitioners, this underscores the critical importance of gradual dietary transitions, careful forage quality assessment, and potentially targeted microbial management strategies in laminitis prevention—particularly in at-risk horses with metabolic predisposition.
Read the full abstract on PubMed
Practical Takeaways
- •Dietary carbohydrate management is critical for laminitis prevention; understanding the hindgut microbial trigger mechanism supports evidence-based feeding protocols
- •Future therapeutic approaches may target hindgut streptococcal populations to prevent or treat carbohydrate-induced laminitis
- •Laminitis remains a life-threatening condition with high euthanasia rates; prevention through appropriate nutrition is essential in practice
Key Findings
- •Hindgut streptococcal species are identified as the most likely causative agent in carbohydrate-induced equine laminitis
- •DNA-based microbiome profiling techniques have significantly increased understanding of the microbiology of laminitis
- •Experimental models for inducing laminitis have facilitated research into the pathophysiology of this condition
- •Carbohydrate ingestion has a well-established association with laminitis development in horses