Medical Dictionary

Colorado tick fever

noun Col·o·ra·do tick fever \ˌkäl-ə-ˈrad-(ˌ)ō-, -ˈräd-\

Medical Definition of Colorado tick fever

  1. :  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 Colorado tick fever is caused by a virus that replicates in blood-forming stem cells, prompting blood count to drop.—Daniel C. Weaver, Discover, July 1999

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a trip made at another's expense

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