Anaplasmosis Statistics

In 2022, 540 confirmed and probable cases of anaplasmosis were reported in Minnesota. The majority of cases with a known onset date reported illness onsets in May, June, or July. This timing is consistent with exposures occurring during the typical peak season for blacklegged tick activity in Minnesota.

• 341 cases (63%) were male
• Median age of cases was 65 years (range, 3 to 93 years), 13 years older than the median age of Lyme disease cases
• 163 (30%) cases were hospitalized at some point for their infection with a median duration of 4 days (range, 2 to 55 days)
   

Charts and Graphs

• Reported Cases of Anaplasmosis in Minnesota by Year, 1996-2022 (PDF)
  Graph showing the number of reported cases of anaplasmosis in Minnesota by year.

Maps

Most anaplasmosis 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

• Anaplasmosis, 2019
  Minnesota Department of Health, Disease Control Newsletter
  • Anaplasmosis, 2018
  • Anaplasmosis, 2017
  • Anaplasmosis, 2016
  • Anaplasmosis, 2015
  • Anaplasmosis, 2014
  • Anaplasmosis, 2013
  • Anaplasmosis, 2012
  • Anaplasmosis, 2011
  • Anaplasmosis, 2010
  • Anaplasmosis, 2009
  • Anaplasmosis, 2008
  • Anaplasmosis, 2007
  • Anaplasmosis, 2006
  • Anaplasmosis, 2005
  • Anaplasmosis, 2004

National Statistics

• Anaplasmosis Statistics
  Maps, charts, tables, and reports from the CDC.