Lyme Disease Statistics
In 2017, 1,408 confirmed Lyme disease cases (25.5 cases per 100,000 population) were reported in Minnesota. In addition, 910 probable cases (physician-diagnosed cases that did not meet clinical evidence criteria for a confirmed case but that had laboratory evidence of infection) were reported.
- 865 (61%) confirmed cases were male
- Median case age was 43 years (range, 1 to 91 years)
- 1,042 (74%) cases had a physician-diagnosed erythema migrans rash
- 416 (30%) cases had one or more late manifestations of Lyme disease (e.g., arthritis or Bell’s Palsy) with confirmation by Western immunoblot laboratory testing (positive IgM ≤ 30 days post-onset or positive IgG).
- Of the 1,300 cases with known illness onset dates, illness onsets peaked from June through August and 70% of erythema migrans rashes occurred in June or July.
Despite some yearly fluctuations, the number of reported cases of Lyme disease has been increasing over the years.
- Median number of cases reported from 2000 to 2008 was 913 cases (range, 463 to 1,239).
- Median number of cases reported from 2009 through 2017 was 1,203 cases (range, 896 to 1,431).
- Interactive Lyme disease data
Interactive facts and figures available through MN Public Health Data Access. Includes reported cases of Lyme disease in Minnesota by year, month, age, sex, and symptom as well as a map of Lyme disease cases over time.
Charts and graphs
- Reported Cases of Lyme Disease in Minnesota
by Year, 1996-2017 (PDF)
Graph showing the number of reported cases of Lyme disease in Minnesota by year.
In recent years, most Lyme disease cases reported likely exposure to blacklegged (deer) ticks in east-central, north-central, and southeast Minnesota.
- High Risk Areas for Tickborne Diseases in Minnesota
A map that shows counties of highest tick-borne disease risk in Minnesota.
- Lyme Disease, 2016
Minnesota Department of Health, Disease Control Newsletter; Annual Summary of Communicable Diseases Reported to the Minnesota Department of Health, 2016
- CDC: Lyme Disease Statistics
Maps, charts, tables, and reports from the CDC.