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West Nile fever is an infection by the West Nile virus, which is typically spread by mosquitoes. [1] In about 80% of infections people have few or no symptoms. [2] About 20% of people develop a fever, headache, vomiting, or a rash. [1] In less than 1% of people, encephalitis or meningitis occurs, with associated neck stiffness, confusion, or ...
West Nile virus (WNV) is a single-stranded RNA virus that causes West Nile fever. It is a member of the family Flaviviridae , from the genus Flavivirus , which also contains the Zika virus , dengue virus , and yellow fever virus.
West Nile Fever (WNF) is a mosquito-borne viral infection caused by the West Nile virus (WNV), a member of the Flaviviridae family. The virus primarily incubates in a bird-mosquito transmission cycle, with humans and other mammals serving as incidental hosts .
During the 2012 West Nile virus outbreak in Texas, 1,868 cases were reported. Male patients, persons >65 years of age, and minorities were at highest risk for neuroinvasive disease. At total of 1,868 cases including 844 (45%) WNND (West Nile neuroinvasive disease) cases and 89 deaths (case-fatality rate 5%).
The first cases of West Nile disease in the United States occurred in 1999 in New York. In the first three years only a small number of human cases were diagnosed, all in the Eastern or Southern U.S. (149 cases and 19 deaths, 1999–2001).
The viral diseases yellow fever, dengue fever, Zika fever and chikungunya are transmitted mostly by Aedes aegypti mosquitoes. [ citation needed ] Other viral diseases like epidemic polyarthritis , Rift Valley fever , Ross River fever , St. Louis encephalitis , West Nile fever , Japanese encephalitis , La Crosse encephalitis and several other ...
West Nile virus (WNV) is a mosquito-borne virus first identified in the United States in 1999. It is most commonly found in Africa, Europe, the Middle East and North America.
Flavivirus, renamed Orthoflavivirus in 2023, [3] is a genus of positive-strand RNA viruses in the family Flaviviridae.The genus includes the West Nile virus, dengue virus, tick-borne encephalitis virus, yellow fever virus, Zika virus and several other viruses which may cause encephalitis, [4] as well as insect-specific flaviviruses (ISFs) such as cell fusing agent virus (CFAV), Palm Creek ...