Infectious agents and inflammatory bowel disease.
D001706:Biopsy; D002473:Cell Wall; D003424:Crohn Disease / Q000209:etiology*; D006801:Humans; D007413:Intestinal Mucosa / Q000276:immunology / Q000382:microbiology; D007740:L Forms / Q000302:isolation & purification* / Q000648:ultrastructure; D013601:T-Lymphocytes / Q000276:immunology