Sections View Full Chapter Figures Tables Videos Annotate Full Chapter Figures Tables Videos Supplementary Content + Download Section PDF Listen ++ For further information, see CMDT Part 15-31: Intestinal Tuberculosis + Key Features Download Section PDF Listen +++ ++ Common in developing nations; rare in the United States, except in immigrant groups or in patients with untreated AIDS Caused by Mycobacterium tuberculosis and Mycobacterium bovis + Clinical Findings Download Section PDF Listen +++ ++ Active pulmonary tuberculosis in < 50% Most common involvement is ileocecal Chronic abdominal pain, obstructive symptoms, weight loss, diarrhea Abdominal mass palpable Complications include Intestinal obstruction Hemorrhage Fistula formation Differential diagnosis Crohn disease Carcinoma Lymphoma Intestinal amebiasis + Diagnosis Download Section PDF Listen +++ ++ PPD skin test may be negative, especially in weight loss or AIDS Abdominal CT Colonoscopy Definitive diagnosis by either endoscopic or surgical biopsy revealing acid-fast bacilli and caseating granuloma or by positive cultures Detection of tubercle bacilli in biopsy specimens by polymerase chain reaction + Treatment Download Section PDF Listen +++ ++ Tuberculosis, initial treatment (Table 9–15) Antituberculous drugs characteristics (Table 9–14)