The following symptoms and complaints may indicate Japanese encephalitis:
- Mild flu-like illness – in most cases.
Meningoencephalitis* (incidence: 1 in 250 infections).
- In circa every 250th case of infection.
- High fever, usually 10 days.
- General feeling of illness
- Cephalgia (headache)
- Nausea (nausea)/vomiting
- Disturbance of consciousness
- Seizures
- Reflex disorders
- Confusion
- Behavioral changes
- Tremor (shaking)
- Paresis (motor paralysis)
- Gait disorders
- Coma
* Combined inflammation of the brain (encephalitis) and meninges (meningitis) The lethality (mortality relative to the total number of people suffering from the disease) in CNS involvement is 30-35%. Children and the elderly are more likely to contract the disease more severely.
