A to Z
Data &
Forms &
News &
Licensing &
Rules &
Public Health

Rocky Mountain Spotted Fever (RMSF, Rickettsia)


Rocky Mountain Spotted Fever affects about 800 people in the United States each year. The disease usually occurs in the eastern US from New York to Florida, and from Alabama to Texas in the south. It is most commonly seen from April through September but can occur anytime during the year when there is warm weather.

Disease Reporting

Health care providers and clinical laboratories are required to report cases and suspect cases of Rocky Mountain spotted fever to local health departments within one working day of identification.

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:
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.



See Also
The CDC fact sheet answers some common questions about Rocky Mountain Spotted Fever.