EHD outbreaks killing deer in Michigan have occurred in isolated areas almost every year since 2006. Prior to 2006, EHD outbreaks in Michigan occurred in 1955 and 1974. The estimated mortality has varied from 50 to 1,000 deer per year in the affected areas.
“Due to the prolonged, dry, hot weather this year, we are not surprised to see EHD emerge again,” said Tom Cooley, DNR wildlife biologist and pathologist. “Mortality numbers will depend on how widespread the disease is -- die-offs usually occur within one watershed area. If multiple watersheds are involved, the total mortality is higher.”
There is no known effective treatment for, or control of, EHD. The disease has been seen for decades in most areas of the United States, especially the southeast states and Texas. It has been less commonly observed in Great Lakes and New England states, although it has now been detected in Michigan in six of the last seven years.
Any sign of EHD would be cause for alarm but especially now that it's been detected in past years.