Spotted Fever Rickettsiosis

Spotted fever rickettsiosis (SFR) is a rare illness in Wisconsin. It’s caused by one of the Rickettsia bacteria in the spotted fever group. The most serious SFR is Rocky Mountain spotted fever

SFR spreads by the bite of an infected tick. Not all tick bites will make you sick, but it’s important to protect yourself and your family while enjoying time outdoors.

SFR is preventable and treatable. Learn more about Tick Bite Prevention.

About Spotted Fever Rickettsiosis

Learn more about SFR, including signs and symptoms, treatment, and resources.

Data

Find map and charts with SFR data.

Reporting and Surveillance

Local or tribal health departments and health care providers can learn about disease reporting, testing, treatment, and more.

Tick Bite Prevention

Find tips to prevent tick bites.

Learn more from the CDC about SFR

Contact us

Questions about illnesses spread by ticks? We’re here to help.

Bureau of Communicable Diseases
Phone: 608-267-9003
Fax: 608-261-4976

Glossary

 
Last revised July 17, 2025