Known Geographic Distribution of Ixodes
scapularis by county in Illinois 2017

Ixodes scapularis is also known as the "deer tick" and the "black-legged tick".
Amblyomma americanum, the lone star tick, and Dermacentor variabilis, the American dog tick,
should be presumed present throughout the state.


Additional tick and host surveillance activities not depicted on this map may have been conducted by other agencies/ organizations in Illinois - findings reflected on this map are those reported to the Illinois Department of Public Health (IDPH). IDPH does not perform testing for disease pathogens in ticks but identification for genus and species is performed at IDPH when the tick is intact and sent in a crush-proof container to:

Illinois Department of Public Health
Entomologist, Division of Environmental Health
525 W. Jefferson St., 3rd Floor
Springfield, IL 62761



idph online home
Environmental Health Home
Illinois Department of Public Health
535 West Jefferson Street
Springfield, Illinois 62761
Phone 217-782-4977
Fax 217-782-3987
TTY 800-547-0466
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