1. any of a large group of viruses transmitted by arthropods, such as mosquitoes and ticks, that include the causative agents of encephalitis, yellow fever, and dengue.

1. any virus that is transmitted by an arthropod

1. a large heterogeneous group of RNA viruses divisible into groups on the basis of the virions; they have been recovered from arthropods, bats, and rodents; most are borne by arthropods; they are linked by the epidemiologic concept of transmission between vertebrate hosts by arthropod vectors (mosquitoes, ticks, sandflies, midges, etc.) that feed on blood; they can cause mild fevers, hepatitis, hemorrhagic fever, and encephalitis