(CNN)Hoof-and-mouth disease (also known as foot-and-mouth disease) is a communicable virus affecting cattle, pigs and other cloven-hoofed animals. Hoof-and-mouth disease is not related to hand, foot, and mouth disease, a virus that infects humans.
It is a member of the genus Aphthovirus in the family Picornaviridae. There are seven types of hoof-and-mouth disease and more than 60 subtypes or strains.
Because it can do great damage to the agricultural economy, hoof-and-mouth disease is considered a potential bioterror threat by the Department of Homeland Security.