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Japanese Encephalitis

by Alike Medical Team ∙ Updated on June 13, 2023

General

Japanese encephalitis is an infection of the brain caused by a virus spread by mosquito bites. Most commonly found in rural areas of southeast Asia, the Pacific islands, and the Far East, it is very rare in travelers.

2 people with Japanese Encephalitis are on Alike.

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Signs & symptoms

Typically, people who have been infected with the Japanese encephalitis virus experience no symptoms or mild, short-lived symptoms. As the infection spreads to the brain, about one out of every 250 people infected with Japanese encephalitis develops more severe symptoms. A few days to a few weeks after infection, this usually happens. The following symptoms can occur: a high temperature (fever) Seizures (fits) Neck stiffness and confusion Incapacity to speak Body parts shake uncontrollably (tremor) A weakness or paralysis of the muscles

Diagnosis

In most cases, JE is diagnosed by testing serum or cerebrospinal fluid (CSF) for virus-specific IgM antibodies. In general, JE virus IgM antibodies are detectable three to eight days after onset of illness and persist for 30 to 90 days, although longer persistence has been documented.

Treatment

Currently, there is no cure for Japanese encephalitis. As the body fights off the infection, treatment involves supporting its functions. To prevent Japanese encephalitis, you should be vaccinated before visiting a place where there is a risk of infection.

Note

☝ We provide information on prescription and over-the-counter medicines, diagnosis, procedures and lab tests. This material is provided for educational purposes only and is not medical advice, diagnosis or treatment.

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