Pseudocowpox is a disease caused by Pseudocowpox virus, (also known as "Paravaccinia") a virus of the family Poxviridae and the genus Parapoxvirus.:393 Pseudocowpox is a worldwide disease of cattle. Symptoms include ring or horseshoe shaped scabs on the teats, which usually heal within six weeks. Lesions may also develop on the muzzles and in the mouths of nursing calves. Spread is by fomites, including hands, calves' mouths, and milking machines.
Lesions may also appear on the hands of milkers, a clinical presentation known as Milker's Nodule. This disease in humans is nearly identical to orf.