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Guide to different tick species and the diseases they carry

American dog tick

The American dog tick is mainly found east of the U.S. Rocky Mountains. The scientific name for this tick is Dermacentor variabilis. The American dog tick also is found in some areas of the Pacific Coast. Those populations may be made up of D. variabilis or a related tick, Dermacentor similis.

American dog ticks can spread Rocky Mountain spotted fever and tularemia.