MedCare360Loading diseases and conditions
Also known as: JE Virus, Mosquito-Borne Brain Infection, Japanese Brain Fever, Viral Brain Swelling From Mosquitoes, Asian Mosquito Brain Virus, Encephalitis From Mosquito Bite
Last Updated: October 31, 2026
Japanese encephalitis is a rare but serious viral infection spread by mosquito bites. It is not found in the UK but is present in rural areas of Asia, including parts of South Korea, Indonesia, and Southeast Asia. While most people infected show no symptoms, some develop flu-like illness. In a small number of cases, the virus can spread to the brain, causing severe and potentially life-threatening complications. These serious symptoms require urgent medical attention and hospital treatment. There is no specific cure, so treatment focuses on managing symptoms and providing supportive care. Vaccination is recommended for travelers at higher risk, alongside measures to prevent mosquito bites.
Explore our range of treatment options for Japanese encephalitis:
Affects
Travelers and residents in rural Asia
Prevalence
Rare for travelers, common in rural Asia
Diagnosis
Clinical assessment, travel history
Treatment
Supportive care, symptom relief
Consult with our healthcare professionals to discuss your symptoms and treatment options.