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Japanese Encephalitis

A serious viral encephalitis common in Asia, transmitted by mosquitoes.

Written by: Saygı Hospital Health Guide Editorial Board
Last updated:

This content has been compiled by the Saygı Hospital Health Guide Editorial Board and is periodically reviewed by a specialist physician.

References (5)

This content is for informational purposes only and does not constitute medical advice. You can book an appointment at our Internal Medicine department. Book Appointment →

What is Japanese Encephalitis?

Japanese encephalitis virus (JEV) is a virus from the Flavivirus family. The natural cycle is maintained between mosquitoes-pigs/birds; humans are intermediate hosts.

Tens of thousands of cases are reported annually in Asia and the Western Pacific. Most cases are asymptomatic; a significant portion of symptomatic cases present with severe encephalitis.

Mortality reaches 20-30%, sequela rate 30-50%. Vaccine is the most effective protection method.

Symptoms

Fever, headache, vomiting
Consciousness changes
Seizures (especially in children)
Neck stiffness and meningismus
Parkinsonism-like movement disorders
Muscle weakness or paralysis
Psychiatric changes

Risk Factors

Being in rural areas in Asia and Western Pacific
Areas with rice paddies and animal husbandry
Unvaccinated travel
Being outdoors during monsoon and rainy seasons
Pediatric and young age
Old age
Immunosuppression

When to See a Doctor?

If you experience any of the following symptoms, seek medical attention promptly:

  • If fever and headache occur after travel to endemic area
  • When seizures, confusion, or neck stiffness develop
  • When sudden fever and behavioral change occur in a child
  • When muscle weakness and partial paralysis emerge
  • In case of suspected exposure in unvaccinated individuals

Treatment Methods

01
Supportive intensive care
02
Seizure management and intracranial pressure control
03
Maintenance of fluid-electrolyte balance
04
Mechanical ventilation when respiratory support is needed
05
Rehabilitation (if sequelae are present)
06
Protection with Japanese encephalitis vaccine

Which Department to Visit?

You can visit our Enfeksiyon Hastalıkları department for these complaints. Our specialist physicians will create the most suitable treatment plan for you.

Learn About Enfeksiyon Hastalıkları Department

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You can make an appointment with our specialists or contact us for your concerns.

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Health Disclaimer: The information on this page is prepared for general informational purposes only. It does not replace medical diagnosis and treatment. Please consult your physician for your complaints. Saygı Hospital does not accept responsibility for actions taken based on the information on this page.