Hi! welcome to HCM! How long he will still be on TPN depends on his general condition and can be judged only by clinician attending your brother. Intestinal T.B. is a matter of concern as it mimics many other diseases hence becomes difficult to diagnose. the intestines may get infected directly due to infection by the bovine strain of mycobacterium tuberculosis -Drinking raw uncooked milk exposes people to the risk of infection OR the infection can pass from the lungs to the intestines via blood stream or lymphatics Most of the guidelines on the treatment of tuberculosis suggest that 6 months treatment is sufficient for extrapulmonary tuberculosis however most physicians treating abdominal tuberculosis use antituberculous therapy for 9 months. Intestinal T.B is not contagious,However it is always advised that close contacts should always be screened for active infection. hope this helps!