Davis E & Rush BR
Equine recurrent airway obstruction: pathogenesis, diagnosis, and patient management.

Vet Clin North Am Equine Pract, 18(3): 453-467, 2002
ISSN: 0749-0739 The Veterinary Clinics of North America - Equine Practice (PubMed)

Abstract
Recurrent airway obstruction is a condition that affects some older horses maintained in confinement. Clinical signs range from exercise intolerance with occasional cough to dyspnea at rest. Bronchoalveolar lavage cytology is characterized by neutrophilic leukocytosis (15% - 85%) and is recommended for making the diagnosis in horses with mild to moderate disease. Environmental management combined with periodic bronchodilator and antiinflammatory corticosteroid therapy yields the best prognosis for disease remission.