Understanding Recurrent Airway Obstruction (RAO) in the Horse
Authors: House Amanda M.
Journal: EDIS
Summary
# Understanding Recurrent Airway Obstruction in Horses Recurrent airway obstruction (RAO), commonly referred to as equine asthma, represents a significant respiratory challenge in horses, characterised by reversible airflow limitation that mirrors asthmatic conditions in humans and is typically triggered by environmental allergens and poor air quality. House's 2010 overview synthesises the clinical presentation, diagnostic approach and management strategies for this condition, drawing on evidence-based veterinary practice to provide equine professionals with a comprehensive reference resource. Key presentations include exercise intolerance, coughing (particularly when stabled or on dusty forage), nasal discharge and increased respiratory effort, with diagnosis supported by clinical signs, airway endoscopy revealing excess mucus and airway inflammation, and in some cases, pulmonary function testing. Management centres on environmental modification—including improved stable ventilation, reduced dust exposure through soaking hay and using low-dust bedding—alongside pharmacological intervention such as bronchodilators and corticosteroids, with many cases showing substantial improvement when triggering factors are controlled. For farriers, veterinarians and other equine practitioners, recognising RAO's impact on performance and welfare, understanding its environmental drivers, and advocating for evidence-based stable management and veterinary intervention can significantly improve long-term outcomes and quality of life in affected animals.
Read the full abstract on the publisher's site
Practical Takeaways
- •RAO is a chronic obstructive airway disease in horses similar to human asthma; understanding recognition and early detection is critical for effective management
- •Diagnostic approaches and treatment protocols should be implemented by practitioners to improve respiratory function and performance in affected horses
- •Environmental management and veterinary intervention are key components of RAO treatment strategies
Key Findings
- •RAO is an asthma-like condition affecting horses with characteristic airway obstruction
- •The condition can be detected through clinical signs and diagnostic methods
- •Management and treatment options are available for RAO