Epizootic Hemorrhagic Disease (EHD) is an orbivirus that infects White-tailed Deer in the northeastern and midwestern United States. The virus is transmitted by the Culicoides biting midge. The EHD virus is closely related to the Bluetongue virus and crossreacts with it on many blood tests. The virus has an incubation period of approximately one week, during which the animal may transmit the virus to biting midges. After the development of symptoms (which include internal hemorrhage, weakness, high fever, bruising, and dyspnea) the animal dies within eight-36 hours.