What is "bornaviridae"

Bornaviridae is a genus of viruses in the order Mononegavirales. Horses, sheep, cattle, rodents, birds, and humans serve as natural hosts. Currently, eight species are included in one genus in this family. Diseases associated with bornaviruses include Borna disease, a fatal neurologic disease of mammals restricted to central Europe; and proventricular dilatation disease in birds.