Table 2.

Common arboviruses of North America

Virus	Distribution	Insect vector	Intermediate vertebrate host
West Nile	U.S., Canada, Mexico	Mosquito (Culex sp.)	Passiform birds (jays, blackbirds, crows, finches, sparrows)
St. Louis encephalitis	U.S., Canada, Mexico	Mosquito (Culex sp.)	Passerine birds (sparrows, house finches),
Eastern equine encephalitis	Atlantic and Gulf coast states, upper New York, Michigan, eastern Canada	Mosquito (Culex sp.)	Fresh water swamp birds
Western equine encephalitis	Western U.S., Canada	Mosquito (Culex sp.)	Passerine birds Jackrabbit
Venezuelan encephalitis	Mexico, Florida, Texas	Mosquito (Culex and Aedes sp.)	Rodents, aquatic birds
Powassan or La Crosse encephalitis	North Central and northeast U.S.	Mosquito (Aedes triseriatus)	Chipmunks, squirrels
Colorado tick fever	Rocky mountain states, Canada	Tick (Dermacentor andersoni)	Chipmunks, squirrels, small mammals
Dengue	Mexico and Florida	Mosquito (Aedes sp.)	Humans and non-human primates