West Nile Virus (WNV)

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The page below is a sample from the LabCE course Mosquito-Borne Viral Diseases. Access the complete course and earn ASCLS P.A.C.E.-approved continuing education credits by subscribing online.

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West Nile Virus (WNV)

West Nile virus (WNV) is an arbovirus in the family Flaviviridae. It is the primary cause of arboviral disease in the United States. Most (80% of cases) are asymptomatic. It is spread by the bite of local mosquitoes. There was a large outbreak in Texas in 2012, primarily in Dallas. Although WNV is now endemic in most of the US, regional outbreaks can occur at any time.
34. CDC. Average annual incidence of West Nile virus neuroinvasive disease reported to CDC by state, 1999-2020. 2021. Accessed October 25, 2022. https://www.cdc.gov/westnile/resources/pdfs/data/WNV-Neuro-Incidence-by-County-Map_1999-2020-P.pdf
35. CDC. Image #10701. This is a digitally-colorized transmission electron microscopic (TEM) image of the West Nile virus (WNV). 2002. Accessed October 25, 2022. https://phil.cdc.gov/Details.aspx?pid=10701

34. West Nile virus neuroinvasive disease by state, 1999-2020.
35. West Nile virus.