Risk factors for a first episode of primary uveitis in the UK and proportion of cases that experience recurrence following this first episode.
Authors: Malalana Fernando, Ireland Joanne L, Pinchbeck Gina L, McGowan Catherine M
Journal: Equine veterinary journal
Summary
# Editorial Summary: Risk Factors and Recurrence Rates for Equine Uveitis Equine uveitis remains a significant clinical concern, yet environmental and management factors predisposing horses to initial episodes have been poorly characterised. This UK-based prospective case-control study followed 23 horses with primary uveitis and 46 matched controls between 2014 and 2018, collecting detailed questionnaire data and applying multivariable logistic regression to identify associations with disease development. Proximity to pig farming operations emerged as a striking risk factor (odds ratio 27.8), as did recent pasture flooding (odds ratio 15.43), whilst stable long-term ownership appeared protective (odds ratio 0.79 per year of ownership); notably, approximately 59% of cases resolved uneventfully without recurrence, though 23% required surgical intervention and 18% experienced recurrent episodes. These findings provide actionable intelligence for practitioners advising owners on environmental modification and risk stratification, though the modest sample size and potential for recall bias warrant cautious interpretation and replication in larger cohorts.
Read the full abstract on PubMed
Practical Takeaways
- •Consider environmental risk factors when assessing uveitis cases: proximity to pig farms and recent pasture flooding are significant risk factors—counsel owners on management changes where possible
- •Most horses (59%) recover well after first uveitis episode with low recurrence rates in UK population, which should inform prognosis discussions with owners
- •Horses recently acquired may be at higher risk; ensure thorough history-taking and monitor recently purchased animals more closely, particularly if located near pig farms or flood-prone pastures
Key Findings
- •Proximity to pig farms increased uveitis risk 27.8-fold (OR 27.8, CI 1.31-592.06)
- •Recent pasture flooding increased uveitis risk 15.43-fold (OR 15.43, CI 2.80-84.98)
- •Longer duration of ownership by same owner was protective (OR 0.79, CI 0.68-0.93)
- •59.1% of cases (n=13) recovered without recurrence; 18.2% (n=4) experienced recurrence; 22.7% (n=5) required surgical intervention