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Chronic Wasting Disease Wildlife Agency Perspective

Gain insights into the potential impacts of Chronic Wasting Disease (CWD) on wildlife and humans, explore research efforts, and learn about collaborative management strategies from the perspective of wildlife agencies.

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Chronic Wasting Disease Wildlife Agency Perspective

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  1. Chronic Wasting Disease Wildlife Agency Perspective Leslie Dierauf, V.M.D. USGS National Wildlife Health Center

  2. CWD – What We Know • Affecting deer and elk for 40+ years • Geographic range has expanded • Increased size of endemic areas • Movement to new areas • Transmissible and infectious • Horizontal transmission • Environmental contamination

  3. Potential Impacts of CWD • Deer and elk • Other wildlife • Domestic livestock • Humans

  4. Potential Impacts – Deer & Elk • Population-level impacts are not yet apparent • 30% prevalence in “core” areas • Higher prevalence in males than females • Higher prevalence in mature males • Is CWD a decimating factor in wild deer and elk?

  5. Addressing the Impacts - Cervids • Surveillance • Spatial Analysis • Genetic markers • Epidemiological modeling • Preclinical biomarkers • CWD+ tissue bank • Risk analysis

  6. Potential Impacts – Other Wildlife • No transmission documented in the wild • Moose and ferret in captive studies (oral inoculation) • Transmission in other TSEs • Scrapie or BSE to mink • Kuru • BSE to cats • BSE to humans (vCJD) • Passaging and the “species barrier” • Can CWD “jump” to other wildlife?

  7. Addressing Impacts – Other Wildlife • Transmission studies • Mice & voles • Ferrets • Predators • Carrion consumers • Carcass consumption study • Testing of scavengers

  8. Potential Impacts - Livestock • No detected transmission to livestock • Cattle and CWD+ deer commingled • No transmission • CWD intracerebrally inoculated into cattle • Transmission can occur • Captive cervid industry

  9. Potential Impacts - Humans • Human health • No indication that transmission has occurred • Laboratory studies show that conversion to human disease form is possible – but at a very low rate • Economics • Big Game hunting - $10 billion annually in U.S. • Majority to rural communities • Hunting heritage • 11 million participants • 150 million hunting days per year

  10. The Costs of CWD • National CWD Plan in the U.S. • Projected cost to implement National Plan • $108 million over initial 3 years • FY 2003 spending • DOI $3.3 million • USDA $18.2 million • States $15.3 million • Federal Aid $2.7 million

  11. Research & Management - Partnerships

  12. Seamless Solutions to Partnering and Stewardship Individuals Engagement/Cooperators Community START MANAGE THE DRIFT STEWARDSHIP Communication Build Trust Embrace Find Time Support Efforts On-the-Ground & Gather Funds Share Information Hands-On Efforts Generate Info Engender Cooperation INVOLVE    CONNECT    CONTRIBUTE    EMBRACE

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