| Patient No. | Age yrs | Symptom duration# weeks | Time from diagnosis¶ weeks | AFB sputum smear | Mycobacterial sputum culture | RFLP pattern | Radiographic findings |
| 1 | 21 | 12 | 4 | Positive | M. tuberculosis | Index case | Cavitary consolidation in RUL |
| 2 | 21 | 4 | 3 | Negative | M. tuberculosis | Same as index | Consolidation in RML |
| 3 | 21 | 5 | 3 | Negative | M. tuberculosis | Different from index | Bronchiolitis in LLL |
| 4 | 21 | 4 | 0 | Negative | Negative | NA | Bronchiolitis in RUL with pleural effusion |
| 5 | 22 | No symptoms | 0 | Negative | Negative | NA | Bronchiolitis in RUL |
Patients 3 and 5 were diagnosed based on abnormal low-dose computed tomography chest lesions. AFB: acid-fast bacillus; RFLP: restriction fragment length polymorphism; M. tuberculosis: Mycobacterium tuberculosis; RUL: right upper lobe; RML: right middle lobe; LLL: left lower lobe; NA: not applicable. #: duration of respiratory symptoms before isolation; ¶: to investigation