Humans are believed to acquire the disease by ingesting infected animal by-products. The human disease is a variation of ________-_______ _______, which is a slow, neural degenerative disease, resulting in eventual death. Other prion diseases include _________, and _____ ______ _______ in deer and elk. There is __ _____ treatment for any of the prion diseases.
Creutzfeldt-Jakob disease; scrapie (in sheep); chronic wasting disease; no effective