Equine recurrent uveitis: Human and equine perspectives.
Authors: Malalana Fernando, Stylianides Amira, McGowan Catherine
Journal: Veterinary journal (London, England : 1997)
Summary
# Editorial Summary: Equine Recurrent Uveitis: Human and Equine Perspectives Equine recurrent uveitis (ERU) represents a spontaneous condition of repeated intraocular inflammation that appears substantially more prevalent in horses than comparable autoimmune anterior uveitis in humans, with certain breeds and geographical regions showing markedly higher incidence rates. Fernando and colleagues conducted a comprehensive review examining the immunological and genetic basis of ERU, drawing comparative analysis with human autoimmune uveitis to elucidate why equines demonstrate such heightened susceptibility to this recurrent disease. Both species exhibit similar patterns of dysregulated immune response and autoimmune pathophysiology; however, the triggering mechanisms remain incompletely understood, though microbial agents including *Leptospira* species have been identified as potential inciting factors in horses. The review highlights that a combination of microbial exposure and genetic predisposition likely underpins the horse's exceptional vulnerability to ERU, distinguishing it from the human disease pattern. For practitioners managing ERU cases, these findings underline the importance of investigating both environmental and breeding history factors, whilst recognising that genetic susceptibility may necessitate long-term anti-inflammatory strategies and potentially difficult management decisions regarding breeding soundness in affected individuals.
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Practical Takeaways
- •ERU is a significant clinical concern in equine practice with breed and geographic risk factors that should inform clinical suspicion and herd screening protocols
- •Understanding the autoimmune nature of ERU helps guide long-term management strategies focused on immune modulation rather than treating only acute episodes
- •Investigation for microbial triggers, particularly Leptospira exposure, should be part of ERU case management, with implications for vaccination and biosecurity practices
Key Findings
- •ERU is significantly more common in horses than recurrent uveitis in humans, with higher prevalence in certain breeds and geographical regions
- •Both species show similarly altered immune responses and marked autoimmune responses as primary disease pathophysiology
- •Leptospira spp. and other microbial agents are potential inciting factors in equine cases
- •Genetic predisposition combined with microbial factors may explain the heightened susceptibility in horses compared to humans