(Creutzfeldt Jakob Disease, Creutzfeldt Jacob Disease, dementia due to Creutzfeldt-Jacob disease, dementia due to Creutzfeldt-Jakob disease, Heidenheim's disease, Jacob Creutzfeldt, Jacob-Creutzfeldt, Jakob Creutzfeldt, Jakob-Creutzfeldt)
Prions or "slow viruses" probably cause this form of usually rapidly progressive Dementia which is transmissible, and can only be diagnosed by biopsy of brain tissue.