Anaplasmosis: Wisconsin Data


Anaplasmosis is the second most commonly reported illness spread by ticks in Wisconsin.

From 2015 through 2019, Wisconsin had an average of 516 probable and confirmed cases of anaplasmosis.

In 2019, a total of 334 probable and confirmed cases of anaplasmosis were reported.

Anaplasmosis is preventable and treatable.

Below are the statewide data for anaplasmosis.

For information on national data, visit the Centers for Disease Control and Prevention (CDC) Statistics and Epidemiology page for anaplasmosis.

Map showing anaplasmosis per 100,000 Wisconsin resident, 2019

Anaplasmosis data

Historical ehrlichiosis surveillance included human granulocytic ehrlichiosis (HGE) and human monocytic ehrlichiosis (HME). As of 2008, the surveillance case definition changed to classify the disease by two different bacterial infections, Anaplasma phagocytophilum and Ehrlichia species.

Anaplasmosis cases in Wisconsin

Graph showing anaplasmosis cases in Wisconsin 2010-2019

Anaplasmosis cases reported by month and age

Month of Illness Onset

Average anaplasmosis cases by month, 2015-2019

Age Group

Graph showing average anaplasmosis cases by age group 2015-2019

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Last Revised: September 27, 2021