title: Is the scrapie agent a virus?
mesh_terms: D000818:Animals; D001921:Brain / Q000382:microbiology; D006224:Cricetinae; D011328:Prions / Q000302:isolation & purification / Q000648:ultrastructure; D012608:Scrapie / Q000209:etiology; D012756:Sheep
chemical_list: D011328:Prions