Endoscopic findings in the upper respiratory tract of 479 horses
Raphel, C.F.
Journal of the American Veterinary Medical Association 181(5): 470-473
1982
ISSN/ISBN: 0003-1488 PMID: 6982261 Document Number: 182999
A flexible fiberoptic endoscope was used to examine the upper respiratory tract of 479 racehorses, 41 (8.6%) had abnormalities. Pharyngeal lymphoid hyperplasia (PLH) was found in 141 horses (29.5%). Statistical analysis showed a relationship between the age of the horse and the prevalence of PLH. Sixteen (3.3%), 10 (2.1%), and 6 (1.3%), of the horses had laryngeal hemiplegia, epiglottic entrapment, and dorsal displacement of the soft palate, respectively. There was no association between the age of the horse and the prevalence of any of these abnormalities; nor was there a positive correlation between the prevalence of exercise-induced pulmonary haemorrhage and PLH or laryngeal hemiplegia.