Batty pathogens: Why do bats spread so many diseases?

A large bat hangs upside down with one wing wrapped around it's body and the other extended. The bat is a mahogany color with brown eyes. There is the wall of a large cage in the background.
The Malayan flying fox, or Pteropus vampyrusm, is one of the largest species of bats in the world. Jim Wellehan, D.V.M., is the veterinarian of record for the Lubee Bat Conservancy in Gainesville, Florida, where this photo was taken. (Image credit: Marisol Amador)

Let’s face it — bats get a bad rap. Their links to disease outbreaks and their spooky association with vampires influence their notoriety. In reality, bats are truly remarkable. Bats support our agricultural industries as vital members of food webs. And, contrary to their portrayal in popular Halloween blockbusters, they are gentle and tidy creatures that groom themselves like cats.

So why is it that when we hear of disease outbreaks, it always seems to be bats?

According to University of Florida Emerging Pathogens Institute member Jim Wellehan, D.V.M., what sets bats apart isn’t black magic at all. But rather, it’s their long history of co-existing with viruses, the unique tradeoffs of flight and, perhaps most of all, a history of adapting to new pathogens.

 “(Infectious disease) has been the biggest factor in all of evolution,” said Wellehan, who is also a professor at the UF College of Veterinary Medicine. “People are always looking for an excuse (as to) why bats are magic, and the truth is bats have just been exposed to a lot of stuff and selected for those genes accordingly.”


Written by: Sydney Burge