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Western Equine Encephalitis

Western equine encephalitis (WEE) is an arbovirus (arthropod borne virus) transmitted by mosquitoes and was first identified in the 1930s as an important cause of encephalitis in horses; however, humans can also contract disease as well. Most reported cases of WEE infection are west of the Mississippi River. WEE is not commonly reported in West Virginia residents.

Reporting Guidelines


Current Case Definition

Required Forms

LHD Tools

Other Links

Vectorborne Disease Report Latest 2016 data on mosquito-borne and tickborne diseases in WV.
2017 West Virginia Mosquito Surveillance Report Annual summary of adult mosquito activity and arboviral infection rate in mosquito populations.
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.