Objective: To identify differentially expressed genes in pulmonary tissues of horses affected with summer pasture-associated obstructive pulmonary disease (SPAOPD), which is a form of recurrent airway obstruction (RAO), compared with those of unaffected horses.
Animals: 6 horses with SPAOPD-RAO and 6 unaffected (healthy) horses.
Procedures: Horses were assigned to 2 groups on the basis of medical history, clinical score, and transpleural pressure.