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Japanese Encephalitis

Japanese encephalitis is a viral infection that primarily affects the brain and spinal cord. It is transmitted to humans through the bite of infected mosquitoes, typically in rural or agricultural areas. Symptoms include fever, headache, nausea, vomiting, and confusion, and in severe cases, it can lead to seizures, paralysis, and death. The disease is prevalent in Asia and the Western Pacific, and vaccination is the most effective way to prevent infection.

No need to book to see your GP. Our qualified travel health specialists can advise and prescribe Japanese encephalitis vaccinations providing a fast and convenient service in the Bristol, Cheltenham & Gloucester areas.

Vaccination Price per dose Price per course (2 doses)
 Japanese encephalitis  £100  £200


Japanese encephalitis can be prevented through a combination of methods:

  • Vaccination: A vaccine is available for people who plan to travel or live in areas where the disease is prevalent. It is especially recommended for people who will be spending long periods of time in rural areas, or for those working in agriculture or other outdoor industries.
  • Mosquito control: Reducing the population of mosquitoes in an area can help to prevent the spread of the disease. This can be achieved through measures such as eliminating standing water (where mosquitoes breed), using insect repellents, and wearing protective clothing.
  • Personal protection: To protect yourself from mosquito bites, you can use mosquito nets and screens on windows, wear long-sleeved clothing and trousers, stay indoors during peak mosquito biting hours (typically at dawn and dusk), use mosquito nets and screens on windows and doors and use insect repellents.
  • Accommodation: If possible, stay in air-conditioned or well-screened accommodation.
  • Stay informed: Keep up to date on the latest information about the disease and the current situation in the area you will be visiting.
  • Take basic precautions: Practice good hygiene and sanitation, and avoid contact with sick or dead animals.

    It's also important to keep in mind that Japanese encephalitis is a seasonal risk, with more cases reported during the rainy season when mosquito populations are high, so it's best to be aware of this when travelling to affected areas during those times.

  • Countries at risk

    Japanese encephalitis is prevalent in many countries in Asia and the Western Pacific, including:

  • China
  • Taiwan
  • Hong Kong
  • Korea
  • Japan
  • Philippines
  • Vietnam
  • Laos
  • Cambodia
  • Thailand
  • Myanmar
  • India
  • Bangladesh
  • Nepal
  • Sri Lanka
  • Indonesia
  • Malaysia
  • Singapore
  • Papua New Guinea
  • Northern Australia

    These are the countries that have reported cases of Japanese encephalitis, but it's important to note that the disease is not limited to these areas, and the risk of infection can vary depending on the time of year and the specific region.

    If you are planning to travel to any of these areas, it's a good idea to check the latest information on the disease and its prevalence in the area you will be visiting, and to take appropriate precautions to protect yourself.

  • Sign and Symptoms

    Japanese encephalitis can cause a wide range of symptoms, which can range from mild to severe. Some people who are infected may not show any symptoms at all.

    The signs and symptoms of Japanese encephalitis include:

  • Fever
  • Headache
  • Nausea and vomiting
  • Fatigue
  • Confusion
  • Drowsiness
  • Stiff neck
  • Seizures
  • Paralysis

    In severe cases, Japanese encephalitis can lead to permanent brain damage and death.

    Symptoms usually appear 5-15 days after the infected mosquito bite. In some cases, the symptoms can take up to a month to appear.

    It's important to note that the symptoms of Japanese encephalitis can be similar to those of other viral infections such as dengue, chikungunya, and Zika, so it's important to see a doctor if you think you may have been exposed to the virus. A blood test or spinal fluid test can confirm the diagnosis.