In 2016, 50 confirmed and probable babesiosis cases (0.9 per 100,000 population) were reported, up from the 45 cases in 2015. Despite slight annual fluctuations, case totals since 2005 (range, 10 to 72) have been consistently higher than reported totals from 1996 to 2004 (range, 0 to 9). In 2016, 28 (56%) of the cases occurred in males. The median case age was 61 years (range, 3 to 88 years), down from 64 in 2015, and older than the median ages for both anaplasmosis (59 years) and Lyme disease (49 years). Onsets of illness peaked in the summer months; 38 (76%) of 50 patients with known onset reported first experiencing symptoms in June, July, or August. Fifteen (30%) cases were hospitalized for their infection in 2016 for a median duration of 5 days (range, 2 to 13 days). Although severe complications like organ failure were reported in 6 cases, there were no deaths attributable to babesiosis in 2016.
Charts and Graphs
- Reported Cases of Babesiosis in Minnesota
by Year, 1996-2016 (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, 2016
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.