West Nile Virus

Paul G. Auwaerter, M.D.

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MICROBIOLOGY

West Nile virus (WNV) is a mosquito-borne flavivirus infection. RNA virus, part of the Japanese encephalitis antigenic complex of viruses.
Humans mainly acquire through the bite of an infected mosquito in tropical and temperate regions; virus mainly found in birds, but also dogs, cats, horses, bats, chipmunks, and other rodents [see transmission cycle].
- Culex spp. a leading cause of WNV infection, but other mosquito species may participate.
- Birds, especially crows and jays, sicken and die when infected. Some locales offer evaluation of dead birds in order to assess for the presence of WNV in the environment.
Cause of epidemic encephalitis, now endemic in the U.S.

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MICROBIOLOGY

West Nile virus (WNV) is a mosquito-borne flavivirus infection. RNA virus, part of the Japanese encephalitis antigenic complex of viruses.
Humans mainly acquire through the bite of an infected mosquito in tropical and temperate regions; virus mainly found in birds, but also dogs, cats, horses, bats, chipmunks, and other rodents [see transmission cycle].
- Culex spp. a leading cause of WNV infection, but other mosquito species may participate.
- Birds, especially crows and jays, sicken and die when infected. Some locales offer evaluation of dead birds in order to assess for the presence of WNV in the environment.
Cause of epidemic encephalitis, now endemic in the U.S.

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