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Start free with EleplanLa Crosse encephalitis
ORPHA:83483Disease
Also called Californian encephalitis
What it is
An acute arboviral infection caused by the La Crosse bunyavirus transmitted by an infected mosquito, usually observed in infants, children or adolescents (6 months to 16 years), and characterized by the onset of flulike symptoms such as fever, chills, nausea, vomiting, headache, and abdominal pain, followed by the onset of encephalitis characterized by somnolence, obtundation, and even seizures, focal neurologic signs (asymmetrical reflexes or Babinski signs), paralysis or even coma. CE can leave sequelae such as residual epilepsy and neurocognitive deficits.
Key facts
- Prevalence
- 1-9 / 100 000 (annual incidence, Canada)
- 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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