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

• Reported Cases of Anaplasmosis in Minnesota by Year, 1996-2018 (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 and north-central 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.