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Colorado Tick Fever

Disease Information

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 by law to report cases and suspect cases of Colorado Tick Fever within one working day of identification. Call 971-673-1111 to reach the state health department doctor on call.

For Local Health Departments

For reportable diseases lacking Oregon-specific investigative guidelines or case report forms, please contact the state epidemiologist on call for assistance at 971-673-1111.

CDC Factsheet 

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