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West Nile Encephalitis

West Nile virus (WNV) is an arbovirus (arthropod borne virus) transmitted by mosquitoes and was first identified in the 1930s in Uganda. In 1999, WNV infections were observed in humans and birds in New York City. Since then, WNV has spread to all states in the continental United States. WNV is not commonly reported in West Virginia residents; however, routine mosquito surveillance in a few West Virginia counties regularly detects the presence of WNV in mosquitoes.

Reporting Guidelines


Current Case Definition

Required Forms

General Information

LHD Tools

Surveillance Data

Vectorborne Disease Report Latest 2016 data on mosquito-borne and tickborne diseases in WV.
2016 Zoonotic Disease Report Summary of findings for all zoonotic diseases, except rabies, in WV during 2016.
2015 Zoonotic Disease Report Annual summary report of vectorborne condition surveillance data.
West Virginia Zoonotic Disease Surveillance Summary, 2014 Click at left to view the 2014 surveillance information about mosquito-borne, tickborne, and other reportable zoonotic diseases.

Other Links

Bird Resources:

All species of wild birds which are freshly dead (less than 24 hours old) are targeted for active surveillance. Poultry (domestic chickens, ducks, turkeys, geese and guinea fowl) and pet birds will not be submitted for testing. Use the websites below to aid in identifying wild birds.

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