Facts about Wildlife Diseases: Things You Should Know about Mule Deerpox Virus in Farmed White-Tailed Deer in Florida

Pox viruses are widespread and infect many hosts, including insects, reptiles, birds, and mammals. Some, like chicken pox, are highly adapted to humans, and others, like monkeypox, can be transmitted from species to species. All are highly contagious and usually cause lesions or rashes. Poxvirus infections occur in domestic hoofstock, including cattle, sheep, goats, camels, horses, and swine, and they have been reported in wild ungulates, including mountain sheep, mountain goats, reindeer, mule deer, musk-ox, caribou, moose, and white-tailed deer. In 1983, Mule deerpox virus, a genetically distinct pox virus, was found in free-ranging mule deer in Wyoming. Since the 1990s, several cases of mule deerpox virus have been reported from black-tailed deer from California and Oregon and a white-tailed deer from Mississippi, suggesting that this virus may be a potential emerging pathogen for white-tailed deer. It is unclear whether the virus is more prevalent or whether detection has increased.