Anaplasmosis: Wisconsin Data


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

From 2016 through 2020, Wisconsin had an average of 472 probable and confirmed cases of anaplasmosis.

In 2020, a total of 335 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 of Anaplasmosis cases by county in Wisconsin

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 of total Anaplasmosis cases

Anaplasmosis cases reported by month and age

Month of Illness Onset

Average Anaplasmosis cases by month

Age Group

Average Anaplasmosis Cases by age

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Last Revised: June 15, 2022