an acute viral disease of swine, characterized by fever and the formation of numerous vesicles on the skin. Swine of all ages are susceptible to the causative agent of the disease. The source of the agent is diseased swine. Infection occurs through contact with diseased animals or through fodder contaminated with their excretions.

Symptoms include elevated body temperature, decreased appetite, salivation, and the appearance of numerous vesicles on the oral mucosa, snout, and udders. The vesicles open, exposing a tender surface. If the extremities are affected, there is edema and lameness. In piglets there may be pneumonia, inflammation of the intestinal tract, and death. Treatment consists in the application of disinfectant and astringent solutions to affected areas. Preventive measures include the observance of sanitary conditions while transporting swine and trading in swine or pork.