Cattle Warts, Bovine Papillomatosis
R. L. Morter, D.V.M., Larry Horstman, D.V.M., School of Veterinary Medicine, Purdue University
Warts are caused by infection with the contagious bovine papillomavirus. Four types of the virus are known to produce skin lesions. All have been described as hardy. Two of the viral types cause most of the warts found on the head and neck of cattle. They will survive in the environment for weeks or months if protected by pieces of tissue such as a shed wart or bits of tissue on a halter. Because of the infectious nature of the wart virus, animals with warts are disqualified from shows and exhibitions.