Hemorrhagic disease outbreak throughout Old North State
Scattered observations of sick and dead deer due to an outbreak of hemorrhagic disease have been reported in numerous counties across the Mountains, Piedmont and Coastal Plain of North Carolina over the last month. Officials with the N.C. Wildlife Resources Commission are asking that citizens report dead or obviously sick deer to their local district wildlife biologist to help monitor the impact of the disease on deer herds across the state.
“Hemorrhagic disease is a common disease in southeastern deer populations that causes sporadic outbreaks every few years, typically resulting in dead deer found near water in late summer,” said Moriah Boggess, deer biologist for the Wildlife Commission. “The term hemorrhagic disease is collectively used for both Bluetongue and Epizootic Hemorrhagic Disease viruses, both of which cause similar symptoms in deer.”
CWD is entirely different
Hemorrhagic disease is very different from Chronic Wasting Disease (CWD), which was first detected in North Carolina this year in two deer from Yadkin County.
“An important difference between the two diseases is that deer, especially in the South, are adapted to hemorrhagic disease because it’s been here as long as we have deer records, but CWD is a relatively new deer disease. Even in the worst hemorrhagic disease outbreaks some deer survive and pass on their immunity to offspring; CWD on the other hand is incurable and deer that contract the disease cannot survive it,” said Boggess. “While it may seem like hemorrhagic disease kills more deer in the short term, the future implications of CWD are much grimmer, because CWD permanently affects population viability and infection rates steadily climb each year.”
Deer populations usually rebound from the disease
Sick deer suspect of having hemorrhagic disease have been reported in 39 counties in the state, with the highest frequency of reports from the Mountains and Piedmont regions. Bluetongue and Epizootic Hemorrhagic Disease have both been confirmed in tissues submitted to laboratories for testing, with numerous more samples pending results. Samples for CWD testing have also been submitted to the laboratory and are pending results. It is still too early in the disease outbreak to determine whether there will be any significant population impacts; however, even following severe hemorrhagic disease outbreaks deer populations typically rebound in a few years.
Once a hemorrhagic disease outbreak begins, it usually continues until weather conditions are not conducive for the biting midges that spread the disease, which is typically the first frost of fall. Some deer that are harvested this fall may have rings in their hooves or scars in the dental palate; both are signs that a deer was infected with hemorrhagic disease and recovered. Hemorrhagic disease is not transmissible to people through the biting midge or consumption of venison.
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