A 12-year-old Australian Thoroughbred stallion that had a 1-centimeter wide wart-like lesion on his penis was diagnosed with a newly identified equine papillomavirus. Veterinarians were called when the stallion had pain upon breeding. The stallion's semen was tested and it was determined that he had the Equus caballus papillomavirus 9 (EcPV9).
Australian researchers mapped the virus genome and it was found to be distinct enough from other equine papillomaviruses to be a new viral species. This is the 13th papillomavirus known to affect horses and donkeys.
Equine papillomaviruses are linked to a variety of equine diseases, including viral papillomatosis, aural and genital plaques, and genital papillomatosis. No biopsies were taken from the stallion; the virus was extracted from semen samples. The newly identified virus is very similar to anther equine papillomavirus that has been linked to equine squamous cell carcinoma; it may be associated with equine papillomavirus-related malignancies.
Drs. Ci-Xiu Li ,Wei-Shan Chang, Katerina Mitsakos, James Rodger , Edward C. Holmes and Bernard J. Hudson of the University of Sydney are calling for more research to determine the virus's association with disease in horses.
Read more at HorseTalk.
The study can be here.
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