Eastern Equine Encephalitis & West Nile Virus

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Eastern equine encephalitis (EEE) is a rare but serious viral disease that is also caused by a virus transmitted by the bite of an infected mosquito with more severe symptoms than for WNV. EEE is an arbovirus (short for arthropod-borne, meaning spread by insects). Birds are the source of infection for mosquitoes, which can sometimes transmit the infection to horses, other animals, and, in rare cases, people.

West Nile Virus (WNV) was first seen in the US in 1999, in the New York City area of Queens. WNV can live in a number of types of birds and is passed bird to bird by certain types of mosquitoes. Occasionally, an infected mosquito will pass the virus to humans or other animals. Most healthy people do not get sick from the virus, but sometimes it may cause symptoms. When a human gets ill from WNV, they may have symptoms including encephalitis (inflammation of the brain) or meningitis (inflammation of the lining of the brain and spinal cord); encephalitis and meningitis can also be caused by head injury, bacterial infections or, more commonly, other viral infections.

 West Nile Virus / EEE Information

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