Colorado tick fever

Col·o·ra·do tick fever

noun \ˌkäl-ə-ˈrad-(ˌ)ō-, -ˈräd-\

Definition of COLORADO TICK FEVER

: a mild disease of the western United States and western Canada that is characterized by intermittent fever, malaise, headaches, myalgia, and the absence of a rash and is caused by a reovirus (species Colorado tick fever virus of the genus Coltivirus) transmitted by the Rocky Mountain wood tick