Michigan and Missouri officials monitor 2026 EHD deer outbreaks as midge-borne virus spreads

Key points

• Michigan DNR confirmed EHD in Branch, Ingham, Jackson, and Lenawee counties on Sept. 9, 2026.
• Missouri Department of Conservation is tracking hemorrhagic disease reports across the state this summer.
• EHD is transmitted by infected midges or biting flies, not directly between deer.
• Symptoms include lethargy, bloody discharge, and swollen tongues; infected deer often seek water to cool down.
• Venison from healthy deer in affected areas is safe to eat, but visibly sick animals should not be consumed.
• Outbreaks typically cease after the first frost kills the midge population.

Background

EHD outbreaks have been recurring in the Great Lakes region. In early September 2026, Wisconsin reported over 700 deer deaths in Washington and Waukesha counties, with at least 600 confirmed in southeastern counties. Michigan had previously reported internal bleeding in southern counties in early September. These events follow a pattern where wet springs and hot, dry summers exacerbate midge populations, increasing transmission rates.

How outlets are covering it

WDIV emphasizes the specific Michigan counties affected and provides detailed guidance on symptoms and reporting via the 'Eyes in the Field' system. It highlights that current levels are similar to 2025. KY3 focuses on the broader Missouri outbreak, noting that dead deer often appear healthy despite rapid death and urging residents to report cases near water bodies. Both sources agree on the midge transmission vector and the lack of human risk, but WDIV provides more granular data on venison safety and specific symptoms, while KY3 focuses on the visual appearance of carcasses.

Why it matters

EHD impacts local deer populations and hunting yields, though long-term population effects are minimal. Public awareness is crucial for reporting carcasses to monitor spread. Hunters and residents must distinguish EHD symptoms from other injuries to avoid unnecessary panic, as the disease does not pose a threat to human health or pets.

What to watch

Michigan DNR will update its webpage with further detections. The first frost is expected to halt transmission by killing midges. Officials in both states continue to monitor reports and encourage public submissions of sick or dead deer for testing.