JEJUNOILEAL bypass has proved to be an effective means of achieving weight loss in morbidly obese individuals refractory to less drastic weight reduction measures. Widespread acceptance of this treatment, however, has been limited by early and remote complications related to the surgical procedure or the catabolic state induced. Electrolyte deficits of calcium, magnesium, and potassium, vitamin deficiencies, oxalate kidney stones and gallstone formation are some of the well-recognized metabolic sequelae.1,2 Equally disturbing have been the reports of progressive fatty infiltration of the liver, sometimes culminating in cirrhosis.3-6 Recently we became aware of two patients in whom tuberculosis developed after jejunoileal bypass surgery. This complication has not been previously reported, to our knowledge. Two hundred jejunoileal bypass patients were available for study at the Loyola University Medical Center and its affiliated hospitals. All patients had been operated on at least six months previously and had been seen regularly since