- Licensing:All rights reserved.Attribution:Mark DrewLicensing:All rights reserved.Attribution:Mark Drew
Epizootic Hemorrhagic Disease
Epizootic hemorrhagic disease (EHD) is caused by a virus in the genus Orbivirus. There are two distinct types of EHD in North America, and about 16 types of BT. The virus is spread between susceptible animals by biting midges (Culicoides spp.).
Commonly Affected Species:
Signs Of Disease
Clinical signs in infected deer include sluggishness, difficulty breathing, and swelling of the head, neck and tongue. Ulcers or erosions of the tongue or gums may be present. Internal lesions include swelling and fluid accumulation in the lungs, ulcers in the abomasum an d hemorrhages on the heart and intestines. Animals with chronic EHD can have abnormal hoof growth, hoof sloughing and sometimes are emaciated..
Where is Disease Found?
EHD is found throughout North America from the southeast to the northwest. EHD and bluetongue have been documented in most areas of Idaho with large outbreaks in white-tailed deer in the Clearwater Region.
How Can I Protect Myself?
Humans are not susceptible to either EHD or BT. Wear rubber or latex gloves when field dressing or butchering carcasses.
Samples to Collect
Take photographs of the affected animal and any lesions observed. Collect the spleen or liver from dead animals. Keep the samples cool or refrigerated until they can be delivered to a conservation officer or an Idaho Department of Fish and Game Regional Office.
Can I Eat The Meat?
Meat of animals that die of EHD or bluetongue are not suitable for human consumption.
What is IDFG doing to help manage this disease?:
EHD and BT are sporadic diseases, especially of white-tailed deer in Idaho. The severity of the disease is largely dependent on the level of herd immunity and animal density. This disease is very difficult to manage on a large scale.
How do I learn more about this disease?