Final answer:
Devic's syndrome is not a prion disease; prion diseases include Kuru, Gerstmann-Sträussler-Scheinker syndrome, Fatal familial insomnia, and Creutzfeldt-Jakob disease. They are transmitted by pathogenic proteins through various means but not casual contact.
Step-by-step explanation:
Among the diseases listed, Devic's syndrome, also known as neuromyelitis optica, is not a prion disease. Prion diseases are a family of rare, progressive neurodegenerative disorders that affect both humans and animals. The diseases mentioned that are prion diseases include Kuru, Gerstmann-Sträussler-Scheinker syndrome, Fatal familial insomnia, and Creutzfeldt-Jakob disease.
Prion diseases, which include the notorious variant Creutzfeldt-Jakob Disease (vCJD), are caused by pathogenic proteins called prions that lead to brain damage. Prion diseases can be transmitted through ingestion of contaminated meat, heredity, or contact with contaminated tissue such as during a blood transfusion, but they are not transmitted via casual contact.