Abstract
This chapter provides an overview of the classification and description of the Colorado tick fever virus, its hosts, the key developments regarding the virus, and the diagnostic techniques and reagents. Colorado tick fever virus causes fever, headache, nausea, sometimes vomiting, and rarely encephalitis in humans. Humans are the accidental hosts for the Colorado tick fever virus. Reservoirs for the Colorado tick fever virus include chipmunks ( Eutamias spp.), squirrels ( Spermophiles spp.), and other rodents. The vectors include ticks ( Dermacentor andersoni ). The virus is restricted to the distributional area of the vector tick, Dermacentor andersoni , that is, the Western United States and Canada. The disease may be transmitted by blood transfusion. Trans-stadial but not transovarian infections occur in the ticks.
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