Impact of CWD on Deer Herd Health — What’s the Connection?

CWD Transmission and Spread

Chronic wasting disease (CWD) spreads through direct contact between infected and susceptible deer, typically through saliva, urine, and feces. CWD has been detected in free-ranging deer populations in 30 U.S. states, with the majority of cases found in the western and central regions. The disease has also been identified in captive deer facilities, highlighting the importance of biosecurity measures to prevent its spread.

Deer Herd Composition and CWD Prevalence

Studies have shown that CWD prevalence is often higher in older deer, with males more frequently affected than females. The disease can also impact deer herd composition, with infected deer often exhibiting weight loss, reduced body condition, and changes in behavior. Research suggests that CWD can lead to population declines of 20-40% or more over several years, depending on the initial prevalence and management strategies implemented.

Management Strategies for CWD Control

Effective management strategies for CWD control often involve a combination of surveillance, monitoring, and hunting regulations. These can include mandatory deer checks, increased hunting bag limits, and restrictions on deer movement and feeding. In addition, landowners and hunters can play a critical role in CWD management by following best practices for deer handling, transportation, and disposal of carcasses to minimize the risk of disease transmission.