Sex variation in the prevalence of exercise-induced pulmonary haemorrhage in racing quarter horses.
Post race endoscopy was carried out on 255 two-year-old quarter horses and exercise-induced pulmonary haemorrhage (EIPH) was diagnosed in 166 (65 per cent) of them. Visible epistaxis was seen in a higher proportion of geldings than in either mares or stallions. The prevalence of EIPH was similar in mares (73 per cent) and in geldings (74 per cent). A significantly lower prevalence (49 per cent) was noted in stallions (P less than 0.01). It was concluded that a sex variation in the prevalence of EIPH exists in two-year-old quarter horses.
D000818:Animals; D004844:Epistaxis / Q000209:etiology / Q000662:veterinary*; D005260:Female; D006470:Hemorrhage / Q000209:etiology / Q000662:veterinary*; D006734:Horse Diseases / Q000209:etiology*; D006736:Horses; D008171:Lung Diseases / Q000209:etiology / Q000662:veterinary*; D008297:Male; D005082:Physical Exertion; D012737:Sex Factors