1. Prion diseases such as Creutzfeldt-Jacob disease can be transmitted from mother sheep to offspring and may be spread through airborne transmission.
2. Fatal familial insomnia is a prion disease characterized by progressively worsening insomnia and autonomic dysfunction that ultimately leads to death.
3. Definitive diagnosis of prion diseases requires brain biopsy or autopsy, though neuroimaging and cerebrospinal fluid analysis can provide supportive evidence for suspected cases.