ImagesDeer ticksTicksTick imbedded in...Antibodies Read More???Acute???Fever???Insect bites and stings???Incidence???Aseptic meningitis???EncephalitisIn-Depth Reports???Lyme disease and related ti...???Viral encephalitis More Features???Printer-friendly version Colorado tick feverDefinitionColorado tick fever is an acute viral infection spread by the bite of the Dermacentor andersoni wood tick.