Are you sure it isn't one of these other, animal related illnesses?
Chicken Pox--Contagious skin rash with an incubation period of 10-21 days
Mad Cow--A fatal bovine brain and spinal-cord disease, or grocer-speak for cheap rib eyes
Elephantiasis--"Big balls" should only be used figuratively
Horse's Ass---Diagnosed solely by angry wives and cured by withholding sex and hiding the remote
(Courtesy of our friends at The Toilet Paper.)