Minimal PTB

My husband got sick just this May 2010 of "koch's infection" = minimal PTB. His chest xray result has opacity in the upper left lobe of the lung (not so sure with this), no skin test done, 3 negative sputum test. He is coughing badly, but no blood, no night sweat but he lose weight. He started taking Myrin-P Forte (4 capsules per day) this June and his second month will be end of July 2010. He will go to see his doctor on friday for check-up and hoping that his miniml PTB will be gone soon.
Can he resume from working (call center or IT staff) even if he is not yet over with the 6 months treatment?
Is it ok that he still continues his studies as full time student from the day he was diagnosed with minimal PTB and under medication?
Now, his cough is all gone, except for times of itchyness in his throat and as if he wants to expell phlegm. His phlegm is in green color. He is also starting to gain weight. But he was so depressed.