If your horse’s cough is persistent and he’s showing other symptoms, call your vet, who can diagnose the cough properly. If the clinical signs indicate IAD, your vet will perform an endoscopy. Endoscopy allows a sample of cells taken from the respiratory tract to be examined in a laboratory. Your vet will use a small volume of saline solution through the endoscope to flush the horse’s windpipe. This is then drawn back up with a syringe and sent for analysis. If your vet suspects the condition is IAD, the best time to take this wash is after your horse has exercised, because then the cells are already in the trachea. If the lab results confirm the cough is a result of IAD, your vet will discuss treatment options.
Your vet will use endoscopy to determine the cause of the cough