Hi ashlove ! Let me explain some thing, if a person has lung tuberculosis
and if he/she swallow sputum and not throwing it out or some time infected food give intestinal tuberculosis. Now! Treatment depends upon site of infection and duration will be 6 month. But but ! Anti TB has serious side effect too, streptomycin
is effective on intestine at joint between short and long intestine. So what i want to say, follow the medicine and keep in touch with doctor, if it is not effective ask for medicine change. Wishing healthy and happiness to you and your friend. Bye.