: any of various RNA viruses (as an arenavirus, bunyavirus, or flavivirus) transmitted principally by arthropods and including the causative agents of encephalitis, yellow fever, and dengue
Any of a large group of viruses that develop in arthropods (chiefly mosquitoes and ticks). The name derives from arthropod-borne virus. The spheroidal virus particle is encased in a fatty membrane and contains RNA; it causes no apparent harm to the arthropod host. Arboviruses are transmitted by bites to vertebrate hosts, in which they establish infections and complete their growth cycle; they include the agents responsible for yellow fever and equine encephalitis. See alsotogavirus.