There have been a lot of helpful suggestions made :
Ask the employee to go on unpaid leave (or 50% paid leave) for two months after consulting his doctor (and preferably an independent medical practitioner who is familiar with TB cases).
You can give him unearned medical leave for two months, stating very clearly that this is a special case, and not meant to create a precedent.
This would be really helpful
Give him an advance on salary while he is on leave to cover initial heavy medical expenses, the sum to be recovered in easy instalments once he resumes full time.
If it is possible to work from home, let him do so, provided there is not too much burden on the rest of the staff.
If, as one of the posts suggests, there is a good TB facility nearby, use the company's influence to get him admitted there and let the company bear his expenses.
You will have to treat this as a special case not creating a precedent, but it will be humanitarian on your company's part to give him as much support as possible during this crucial time.
Hope these suggestions are feasible.
Jeroo