Japanese Encephalitis Disease Summary

Last updated: 11 November 2024

Content on this page:

Content on this page:

Overview

Japanese encephalitis virus is a single-stranded RNA mosquito-borne flavivirus that causes of viral encephalitis across Asia, the Western Pacific region, and parts of Australia due to its frequency and severity.
Symptomatic patients initially develop sudden onset febrile illness, followed by headache, vomiting and other neurologic symptoms such as altered consciousness and seizures in 85% of children and 10% of adults. While in children, gastrointestinal pain and vomiting may be the dominant initial symptoms
Japanese encephalitis virus infection should be considered in a patient with evidence of a neurologic infection who has recently traveled to or resided in an endemic country in Asia or the western Pacific.
There is no specific antiviral treatment for Japanese encephalitis virus and management is mainly symptomatic treatment and supportive care.

For further information regarding the management of Japanese Encephalitis, please refer to Disease Algorithm for the Treatment Guideline.