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Start free with EleplanWest-Nile encephalitis
ORPHA:83476Disease
Also called West-Nile fever
What it is
An acute arboviral infection caused by a virus of the Flaviviridae family transmitted by an infected mosquito, that is asymptomatic in the majority of cases but that can present in rare occasions with mild flulike symptoms such as low-grade fever, arthralgia, myalgia, and/or rash, or with neurologic manifestations including meningitis, encephalitis with mental confusion or disorientation, tremors and acute flaccid paralysis/poliomyelitis.
Key facts
- Prevalence
- 1-9 / 1 000 000 (United States)
- Age of onset
- All ages
- Inheritance
- Not applicable
- Classified as
- Disease
Prevalence figures describe populations, not individuals, and are often estimates from a single study. Where the figure is an incidence or a birth prevalence, it says so.
ICD-10 codes
Related health topics
Reached through the ICD-10 categories this disease is filed under, so these describe the broader group rather than this disease specifically.
Cross-references
Orphadata Science: Free access data from Orphanet. © INSERM 1999. Data version 2026-06-23. Available under CC BY 4.0. This is a reference, not medical advice.
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