Patients are chosen by a random selection process to either the INH or the rifampin / pyrazinamide arm of the dose. Patients on the INH arm receive INH plus vitamin B6 (pyridoxine hydrochloride ) daily for 12 months. Patients on the other arm receive rifampin plus pyrazinamide for 60 days. Dosage of rifampin and pyrazinamide depends on weight of patient.