In 2018, 49 confirmed and probable babesiosis cases (1.1 per 100,000 population) were reported in Minnesota, down slightly from the 59 cases in 2017.
- 33 (67%) of the cases occurred in males.
- Median case age was 64 years (range, 5 to 84 years), older than the median ages for both anaplasmosis (61 years) and Lyme disease (44 years).
- 86% of patients reported illness onsets in June, July, or August.
- 15 (31%) cases were hospitalized for their infection for a median duration of 4 days hospitalization (range, 2 to 10 days).
Despite slight annual fluctuations, the overall trend is increasing over the years.
- Case totals since 2009 (range, 31 to 72) have been consistently higher than reported totals from 2000 to 2008 (range, 1 to 29).
Charts and Graphs
- Reported Cases of Babesiosis in Minnesota
by Year, 1996-2018 (PDF)
Graph showing the number of reported cases of Babesiosis in Minnesota by year.
Most babesiosis 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.
Annual Summary Statistics
- Babesiosis, 2018
Minnesota Department of Health, Disease Control Newsletter;
Annual Summary of Communicable Diseases Reported to the Minnesota Department of Health.
- Babesiosis Statistics
Maps, charts, tables, and reports from the CDC.