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Anaplasmosis: Wisconsin Data

Anaplasmosis is the second most common illness spread by ticks in Wisconsin, after Lyme disease.

From 2013 through 2022, Wisconsin had an average of 530 confirmed and probable cases of anaplasmosis reported per year.

In 2022, a total of 511 confirmed and probable cases of anaplasmosis were reported. Cases were most commonly reported among people living in the northern and western regions of the state.

Anaplasmosis is preventable and treatable. Learn more about Tick Bite Prevention.

Read about Treatment and Signs and Symptoms from the CDC (Centers for Disease Control and Prevention).

The graphs below show statewide data for anaplasmosis. For national data, visit the CDC webpage on Anaplasmosis Epidemiology and Statistics.

Map of Anaplasmosis cases by county in Wisconsin

Anaplasmosis data

Graph of total Anaplasmosis cases


Average Anaplasmosis cases by month


Average Anaplasmosis Cases by age

Learn more about anaplasmosis

Contact us

Questions about illnesses spread by ticks? We’re here to help.

Bureau of Communicable Diseases
Phone: 608-267-9003
Fax: 608-261-4976

Last revised July 6, 2023