Know the Facts: Chronic Wasting, Epizootic Hemorrhagic Diseases in Iowa

Iowa’s deer population faces ongoing threats from Chronic Wasting Disease (CWD) and Epizootic Hemorrhagic Disease (EHD), prompting surveillance and management efforts by the Iowa Department of Natural Resources (DNR). CWD, a fatal neurodegenerative disease, spreads through misfolded prions and has no cure. Since its detection in Iowa in 2013, 519 cases have been confirmed across 30 counties, with Marshall County emerging as a hotspot. The DNR conducts annual testing and urges hunters to submit lymph node samples to track disease spread.

EHD, caused by biting midges, has led to fluctuating outbreaks, with 75 carcasses reported in Tama County in 2024. Unlike CWD, EHD is seasonal and sometimes survivable. Experts stress public involvement, urging hunters to report sick deer, avoid artificial feeding sites, and follow disposal guidelines. Continued research, testing, and cooperation remain crucial in protecting Iowa’s deer populations and hunting traditions. Reports can be submitted via the Go Outdoors Iowa app.