Babesiosis is a tick-borne disease of various wildlife (such as lions, deer, primates, rhinos, etc.) caused by protozoan parasites of the genus Babesia . Babesiosis affects a wide range of domestic and wild animals, and occasionally humans. Species of Babesia vary in their infectivity. Species of Babesia relevant to wildlife include: B. bovis , B. leo, B. cati, B. felis , B. divergens , B. majo r, B. ovata , B. occultans , B. orientalis, B. mer i, and B. jakimovi.