Swinepox is a worldwide disease of pigs caused by a virus of the family Poxviridae and the genus Suipoxvirus. It is the most common cause of pox disease in pigs, with vaccinia virus being the next most common cause of outbreaks. It is a mild disease. Symptoms include papules and pustules on the skin of the abdomen. Characteristic lesions on the lower abdomen have dark hemorrhagic centers. Swinepox is transmitted by direct contact and by the pig louse, Hematopinus suis.