Welcome to healthcare magic! And thanks for writing to us!
If TB is confirmed by biopsy
, then the treatment would have to be for at least 6 months. He will have to be regular and prompt in taking the medication. At the end of 6 months, he will be rechecked to assess the progress of his condition. In majority of the cases, with prompt treatment, the infection will subside. In the rare cases that doesnt, the treatment will have to be prolonged for another three months. During the initial phase, the patient is contagious and may have to be isolated; either at home or in a hospital setting. This would be decided by your health care provider.
If the wedding can be prolonged, that would be a much better idea. Because, your brother is quite contagious now and there is a chance that he may pass on the infection to others. Once he has been declared infection free, at the end of the prescribed time, the wedding can be decided.
All the best and do take care!