Tickborne diseases in Illinois (IMAGE)
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+ Anaplasmosis incidence has remained low across the state, with most cases reported in counties lacking active tick surveillance.
^Illinois ranks among the top 13 states with increasing incidences of Alpha-Gal Syndrome. AGS is not a reportable condition at present.
*Heartland virus was diagnosed in two individuals in 2018: one in Kankakee County and one in Williamson County, 272 miles away. A third person residing in Jackson County was diagnosed with HV in 2023.
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Graphic by Julie McMahon
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