Case-Control Study of Risk Factors for Equine Asthma in Texas.
Authors: Thomas Sarah J, de Solis Cristobal Navas, Coleman Michelle C
Journal: Journal of equine veterinary science
Summary
# Editorial Summary Equine asthma remains a frequently encountered respiratory condition in practice, yet surprisingly little is known about the host factors that predispose horses to develop it. This case-control study examined 37 horses diagnosed with mild to severe equine asthma (confirmed by bronchoalveolar lavage or tracheal wash cytology) against two matched control groups—one temporally matched and one age-matched—drawing on five years of clinical records from a US university teaching hospital, with conditional logistic regression used to identify significant risk associations. Obesity, defined as a Body Condition Score of 7 or above, emerged as the only statistically significant risk factor for equine asthma in this population, suggesting a clear link between metabolic status and lower airway disease that warrants further mechanistic investigation. For practitioners, this finding highlights the potential for targeted weight management as both a preventive measure and a pragmatic management strategy in susceptible horses, whilst also signalling that many previously assumed risk factors—such as specific feeding practices or stable management variables—may be less influential than anticipated and deserve reassessment.
Read the full abstract on PubMed
Practical Takeaways
- •Maintaining optimal body condition (BCS <7) may help prevent equine asthma development and should be a primary management target for at-risk horses
- •Overweight horses presenting with respiratory signs warrant careful evaluation for asthma, as obesity appears to be a modifiable risk factor
- •Weight management programs may be a cost-effective preventive strategy for lower airway disease in equine populations
Key Findings
- •Obesity (Body Condition Score ≥7) was the only statistically significant risk factor for equine asthma identified in this Texas population
- •37 incident cases of mild to severe equine asthma were compared against 37 temporal controls and 37 age-matched controls
- •Disease was diagnosed clinically with cytologic support via bronchoalveolar lavage or tracheal wash
- •No other host-related factors from signalment, diet, stable management, or medical history reached statistical significance