pseudocowpox

noun

pseu·​do·​cow·​pox -ˈkau̇-ˌpäks 

: a common infection of the teats and udders of cows that is marked by the formation of often painful lesions and scabs and is caused by a double-stranded DNA virus (species Pseudocowpox virus of the genus Parapoxvirus)

called also false cowpox

see milker's nodules