This document discusses arboviruses, which are viruses transmitted by arthropods like mosquitoes and ticks. It defines arboviruses and provides their classification. The major families of arboviruses are Togaviridae, Flaviviridae, Bunyaviridae, Reoviridae, and Arenaviridae. Some important arboviruses and the diseases they cause include dengue, yellow fever, Japanese encephalitis, West Nile virus and chikungunya. Diagnosis involves virus isolation, antigen detection, genome detection and serology. Major vectors are mosquitoes and ticks.