This article was originally posted on RealClearScience.
Zoonotic diseases, such as the plague and Ebola virus, jump from animals to humans. Often, but not always, such interspecies transmission occurs following mutations in the pathogen’s genome that make it more suitable for targeting a new host. But, infectious disease is not a one-way street. This same evolutionary process also makes possible “reverse zoonosis” (more properly dubbed zooanthroponosis) — i.e., the transmission of disease from humans to animals. Continue reading