A zoonotic disease or zoonosis (plural is zoonoses) is any disease of animals that can be transmitted to people. This list includes some zoonotic diseases and related topics that affect people in Washington State. For brochures, reports, and other handouts, see our animal and vectorborne disease publications. zoonotic disease or zoonosis (plural is zoonoses) is any disease of animals that can be transmitted to people. This list includes some zoonotic diseases and related topics that affect people in Washington State. For brochures, reports, and other handouts, see our animal and vectorborne disease publications.