Washington sportsmen who venture out-of-state to hunt big game cannot legally return with certain parts of ungulate species taken in states or provinces where chronic wasting disease has been detected. CWD, a form of transmissible spongiform encephalopathy, is a degenerative brain disease that afflicts North American deer, elk and moose. While fatal to the infected animals, wildlife and health authorities have found no indication that CWD can be transmitted to humans.