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.
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
Anaplasmosis cases reported by month and age
Month of Illness Onset
Age Group
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