Michigan Reports First Cases of Epizootic Hemorrhagic Disease in 2025

The Michigan Department of Natural Resources has announced the state’s initial cases of epizootic hemorrhagic disease (EHD) for 2025.

EHD was confirmed in free-ranging white-tailed deer from Eaton, Jackson, Van Buren, and Washtenaw counties. This viral disease, which can be fatal for deer, is spread through bites from infected midges or biting flies, officials explained.

Fortunately, there’s no indication that humans, pets, or other wildlife in Michigan can catch this virus. The DNR assures that venison from areas affected by EHD is safe for consumption.

This disease generally impacts deer during late summer and early fall. The DNR pointed out that outbreaks tend to be more severe in years following a wet spring and a hot, dry summer.

Brent Rudolph, a specialist in deer, elk, and moose management with the DNR, noted that in previous years, confirmed cases of EHD typically affected one or only a few counties. “There have been times, of course, when outbreaks have shown up in over a dozen counties, even reaching thirty in 2012,” he remarked.

As additional samples come from other counties, any new findings will be shared on the DNR’s official website.

If you happen to encounter a deer that you believe may have contracted or died from EHD, you are encouraged to fill out a report for diseased wildlife.

Visible signs of EHD in deer can include lethargy, disorientation, lameness, or unresponsiveness. Those infected might also exhibit bloody discharge from the nose and mouth, a swollen blue-tinged tongue, along with swelling around the eyelids, neck, or head.

After the presence of EHD is confirmed in a county, ongoing testing for the virus isn’t necessary. However, the DNR still welcomes reports of suspected cases online to help gauge the outbreak’s scope.

While past EHD outbreaks haven’t typically caused major long-term impacts on Michigan’s deer populations, officials noted that there can be significant mortality in smaller areas, and the local effects might linger for a few years.