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.

Health care providers: Use our secure web-based confidential reporting system – OR – use the confidential PDF reporting form.
See How and Where to Report for more information and local health department contacts.

For Local Health Departments

Colorado Tick Fever: CDC Rickettsial Tick-borne Diseases case report form (pdf)

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.