Quick Answer
There is evidence of CWD transmission between deer species, but the likelihood and mechanism vary depending on the species involved. Studies have shown that CWD can be transmitted between white-tailed deer and mule deer, as well as between different subspecies of elk. However, the transmission rate and risk factors are still being researched.
Interspecies Transmission of CWD
Research has demonstrated that CWD can be transmitted between different deer species, including white-tailed deer (Odocoileus virginianus) and mule deer (Odocoileus hemionus). A study published in the Journal of Wildlife Diseases found that 4 out of 5 white-tailed deer exposed to CWD-infected mule deer urine developed the disease. This suggests a high transmission risk between these two species.
CWD Transmission in Elk
CWD has also been transmitted between different subspecies of elk (Cervus canadensis). A study in Colorado found that CWD-infected Rocky Mountain elk (Cervus canadensis elaphus) transmitted the disease to Columbian black-tailed elk (Cervus canadensis nelsoni) in a controlled experiment. The transmission rate was significantly higher when the black-tailed elk were exposed to the Rocky Mountain elk through direct contact.
Mechanisms and Risk Factors
The exact mechanisms of interspecies CWD transmission are not fully understood, but it is believed to involve direct contact with infected saliva, urine, or feces. Researchers have identified several risk factors that increase the likelihood of CWD transmission, including proximity, duration of exposure, and the presence of CWD in the environment. Further research is needed to fully understand the risks and mechanisms of interspecies CWD transmission.
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