Japanese encephalitis history and symptoms
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]
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Overview
History
Common Symptoms
The incubation period for Japanese encephalitis is usually from 5 to 15 days.
- Less than 1% of people infected with Japanese encephalitis (JE) virus develop clinical illness.
- In persons who develop symptoms, the incubation period (time from infection until illness) is typically 5-15 days.
- Initial symptoms often include fever, headache, and vomiting.
- Mental status changes, neurologic symptoms, weakness, and movement disorders might develop over the next few days.
- Seizures are common, especially among children.
- More severe infection is marked by quick onset, headache, high fever, neck stiffness, stupor, disorientation, coma, tremors, occasional convulsions (especially in infants) and spastic (but rarely flaccid) paralysis.