Chronic wasting disease of cervids

Area of Science:

• Veterinary Neurology
• Wildlife Disease Ecology
• Prion Disease Research

Background:

• Chronic wasting disease (CWD) is a significant prion disease impacting captive and wild cervids in North America.
• It is the only transmissible spongiform encephalopathy (TSE) known to affect free-ranging wildlife species.
• CWD is endemic in a core area of Colorado and Wyoming, with increasing detections in other regions.

Purpose of the Study:

• To review the current understanding of Chronic Wasting Disease (CWD) pathogenesis and epidemiology.
• To discuss the implications of CWD for wildlife, livestock, and public health.
• To outline current and recommended management strategies for CWD.

Main Methods:

• Review of recent research on CWD pathogenesis and epidemiology.
• Analysis of CWD transmission routes, including horizontal spread and environmental contamination.
• Evaluation of diagnostic methods and surveillance programs.

Main Results:

• CWD is infectious and spreads horizontally between cervids, with potential shedding via feces and saliva.
• Environmental contamination plays a role in sustaining CWD epidemics.
• Improved diagnostic tests allow for early detection before clinical signs appear.

Conclusions:

• CWD management requires interagency cooperation, funding, and applied research.
• Surveillance and regulations are crucial in areas where CWD is not present.
• In affected areas, management focuses on monitoring spread, population control, and developing eradication techniques.