z Flavivirdae By: Tyunna Logan z Flavivirdae Description any of a group of RNA viruses, mostly having arthropod vectors, that cause a number of serious human diseases including yellow fever, dengue, various types of encephalitis, and hepatitis C. any virus of the genus Flavivirus or the family Flaviviridae z Type of Dieases Dengue Fever: a debilitating viral disease of the tropics, transmitted by mosquitoes, and causing sudden fever and acute pains in the joints. Hepatitis C is a viral infection that causes liver inflammation, sometimes leading to serious liver damage. The hepatitis C virus (HCV) spreads through contaminated blood. Japanese encephalitis: An infection found in Asia and the west Pacific that can cause brain swelling. West Nile encephalitis.A febrile disease caused by the West Nile virus that is transmitted from birds to the common Culex mosquito and then to people.