Aedes albopictus
La Crosse encephalitis was discovered in 1965, after the virus was isolated from stored brain and spinal tissue of a child who died of an unknown infection in La Crosse, Wisconsin in 1960. It occurs in the Appalachian and Midwestern regions of the United States. Recently there has been an increase of cases in the South East of the United States. An explanation to this may be that the mosquito "Aedes albopictus" is also an efficient vector of La Crosse virus. "Aedes albopictus" is a species that has entered the US and spread across the SE of the US and replaced "Aedes aegypti" in most areas (which is not an efficient vector of LAC).