Chronic Wasting Disease Detected In Four Additional Illinois Counties
SPRINGFIELD – Chronic wasting disease, or CWD, has been detected in Putnam, Marshall, Adams, and Peoria counties, expanding the geographic presence of the disease in free-ranging deer populations in northern Illinois, the Illinois Department of Natural Resources announced today. Adams County is the first documented case recorded outside of the leading edge of the CWD endemic region. CWD is an always-fatal neurological disease that affects the long-term health of white-tailed deer in Illinois. First documented in Illinois in 2002 near Roscoe, CWD has been detected in 25 counties across northern Illinois and now as far south as Adams County in west-central Illinois. In early February 2025, CWD was detected and confirmed through diagnostic testing in Putnam, Marshall, and Adams counties from routine surveillance of hunter-harvested deer. Peoria County was confirmed in a 2-year-old deer exhibiting clinical signs consistent with CWD infection using the same diagnostic testing procedures
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