Mosquito-Borne Viral Encephalitis
DefinitionEncephalitis is inflammation of the brain. Certain mosquito-borne viruses can lead to encephalitis. Examples of these viruses include:
- West Nile encephalitis
- Eastern equine encephalitis
- Western equine encephalitis
- St. Louis encephalitis
- La Crosse encephalitis
- Japanese encephalitis
- Venezuelan equine encephalitis
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CausesThe most common cause is being bitten by an infected mosquito. There are other, rarer causes, such having a blood transfusion with infected blood.
Risk FactorsThe greatest risk factors are spending time in areas where mosquitoes are present and not using insect repellent.People who are age 50 years and older and those with a weakened immune system have a higher risk of developing serious symptoms.
SymptomsMost people who become infected with one of these mosquito-borne viruses do not develop any symptoms.If symptoms do occur, they are generally mild and may include flu-like symptoms, such as:
- Joint and muscle pain
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