 Large-scale outbreaks in wild ruminants affect livestock and the production industry.EHD has been found in some domestic ruminants and many species of deer including white-tailed deer, mule deer, and pronghorn antelope.Seropositive black-tailed deer, fallow deer, red deer, wapiti, and roe deer have also been found, which essentially means that they were exposed to the disease at some time in the past, but may not be involved in transmission.