title: Creutzfeldt-Jakob disease, spiroplasmas, and crystalline artifacts.
mesh_terms: D007562:Creutzfeldt-Jakob Syndrome / Q000382:microbiology* / Q000473:pathology; D006801:Humans; D013149:Spiroplasma / Q000302:isolation & purification* / Q000472:pathogenicity / Q000648:ultrastructure