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Japanese encephalitis

The  japanese encephalitis is caused by a Flavivirus.

The disease spreads to humans when they are bitten by an infected mosquito.Japanese encephalitis is found in almost all Asian countries and parts of the western Pacific. It is mainly a threat in rural agricultural areas where there is widespread irrigation (artificial watering of crops). This includes areas with rice fields.

Symptoms can take between 5 and 15 days to appear. It is common for most people to show no symptoms.

Less than 1% of infected people develop encephalitis (brain swelling), which is fatal in about 20% to 30% of these cases.

In severe cases, symptoms usually appear suddenly, starting with:

  • fever
  • vomiting
  • headaches

Symptoms may also include:

  • coma
  • seizures
  • stiff neck
  • confusion
  • general weakness
  • movement disorders
  • mental or behaviour changes
  • paralysis (being unable to move)
  • possible long-term nerve and brain damage

Source: Health Canada

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