Anaplasmosis Statistics - Minnesota Dept. of Health

Anaplasmosis Statistics

In 2018, 496 confirmed or probable cases of anaplasmosis (8.9 cases per 100,000 population) were reported in Minnesota, down from the 638 cases reported in 2017.

  • 307 cases (62%) were male.
  • Median age of cases was 61 years (range, 2 to 92 years), 17 years older than the median age of confirmed Lyme disease cases.
  • 72% of cases reported illness onsets in June and July.
  • 132 (27%) cases were hospitalized at some point for their infection with a median duration of 4 days hospitalization (range, 2 to 33 days).

Despite some annual fluctuations in reported cases, the overall trend is an increase in yearly case totals over time with a median of 627 cases reported per year since 2010.

Charts and Graphs


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

Annual Summary Statistics

National Statistics

Updated Monday, 11-Oct-2021 10:20:41 CDT