Definition:
A rare but serious and often fatal infection of Togavirus that causes encephalitis (inflammation of the brain). The virus is maintained via a bird- to-mosquito cycle, primarily by mosquitos that feed on the blood of birds. Transmission of EEE to mammals (including horses and humans) occurs via “bridge vectors,” mosquito (including those from the Aedes genus) that feed on the blood of both birds and mammals and transfer the virus. Origin: Americas.