Equine papillomatosis presents in 3 major syndromes, ‘grass warts’, pastern papilloma and pinnal acanthosis (auralplaques). Caused by the equine papilloma virus. It most commonly affects young horses, age <4 years. Usually resolve spontaneously eventually. Prediliction sites determined by the mode of transmission of the infective agent.
Clinical signs
’Grass warts’
These commonly occur around the muzzle and on the face of young horses. The predilection sites are around the commissures of the lip and the side of the face.
They do occasionally develop on other thin-skinned areas such as the inguinal and perineal skin.
