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Colorado Tick Fever


Colorado Tick Fever (CTF) is also known as Mountain Fever or American Mountain Fever. The virus is spread to humans by bites from infected ticks. Symptoms include a sudden fever, headache, muscle pain and chills. CTF can be a severe illness, especially in children under 10 and older adults.


Disease Reporting

What is required?

Health care providers and clinical laboratories:
Health care providers and clinical laboratories are required to report cases and suspect cases of Colorado Tick Fever within one working day upon identification. Call 971-673-1111 to reach the state health department doctor on call.

Disease reporting form (pdf) for health-care practitioners

See our disease reporting page for information on how to report and for telephone numbers of local health departments.

For county health departments:
Colorado Tick Fever: CDC Rickettsial Tick-borne Diseases (pdf) case report form

For reportable diseases lacking Oregon-specific investigative guidelines or case report forms, please contact the epidemiologist on call for assistance.