Hard Tick Relapsing Fever (HRTF) Statistics

Human illness due to Hard Tick Relapsing Fever was first identified in 2011 with the first case in Minnesota reported in 2016. Since then, a low number of cases have been reported in Minnesota residents each year.

On this page:
Maps
 

Maps

Most HRTF cases report likely exposure to blacklegged ticks in the same east-central, north-central, and southeast Minnesota counties where the risk of Lyme disease is greatest.

• High Risk Areas for Tickborne Diseases in Minnesota 
  A map that shows counties of highest tickborne disease risk in Minnesota.