An infectious dermatitis of sheep and goats, affecting primarily the muzzle and lips. It is caused by a poxvirus and may be transmitted to humans. The disease is contagious pustular dermatitis (MONDO_0005717, a Monarch Disease Ontology identifier). Also known as: Orf, ecthyma contagiosum, ecthyma, Contagious, scabby mouth, sheep pox, thistle disease.