title: Negative findings in laboratory animals for a transmissible agent in Crohn's disease.
mesh_terms: D000818:Animals; D015478:Antigens, Heterophile; D001344:Autopsy; D001706:Biopsy; D003424:Crohn Disease / Q000209:etiology* / Q000382:microbiology / Q000473:pathology; D006087:Graft vs Host Reaction; D006099:Granuloma / Q000473:pathology; D006168:Guinea Pigs; D007082:Ileum / Q000473:pathology; D007165:Immunosuppression Therapy; D051379:Mice; D009161:Mycobacterium / Q000472:pathogenicity; D010325:Pasteurella / Q000472:pathogenicity; D051381:Rats; D013934:Thymectomy
chemical_list: D015478:Antigens, Heterophile