Table 1. Clinical characteristics of study subjects.
| TB status | HIV Status | Other | Subjects, no. | Geographic Region | Sputum Smear | Treatment† |
| Positive | Negative | - | 100 | India | Positive | Untreated |
| - | 10 | South Africa | Positive | Untreated | ||
| Positive | Positive | - | 14 | India | Positive | Untreated |
| Negative | Positive | - | 72 | United States | ND | ART |
| Negative | Negative | Lung Disease | 26 | India | ND | NA |
| Negative | Negative | Household Contact | 30 | India | ND | NA |
| Negative | Negative | Healthy Contact | 50 | India | ND | NA |
| Negative | Negative | PPD Negative | 5 | United States | ND | NA |
| 27 | India | ND | NA | |||
| 4 | China | ND | NA | |||
| 1 | Germany | ND | NA | |||
| 1 | Indonesia | ND | NA | |||
| 1 | Jamaica | ND | NA | |||
| 1 | Romania | ND | NA | |||
| 1 | Vietnam | ND | NA | |||
| Negative | Negative | PPD Positive | 5 | United States | ND | NA |
| 22 | India | ND | NA | |||
| 8 | China | ND | NA | |||
| 3 | Cameroon | ND | NA | |||
| 2 | Poland | ND | NA | |||
| 1 | Columbia | ND | NA | |||
| 1 | Spain | ND | NA | |||
| Unknown | Negative | PPD Unknown | 15 | India | ND | NA |
†
Treatment status at the time of serum collection; ND: Not done; ART: Anti-retroviral therapy; NA: Not applicable.