Table 1.
Demographic and diagnostic characteristics of study groups.
| NID | LTBI | TB | Asthma | PN | ||
|---|---|---|---|---|---|---|
| Number of subjects | 25 | 27 | 27 | 22 | 22 | |
| Females/Males | 12/13 | 15/12 | 9/18 | 15/7 | 15/7 | |
| Age | Mean (SD) | 32.6 (12.5) | 42.1 (15.8) | 34.4 (13.6) | 55.0 (10.2) | 55.0 (10.2) |
| Range | 20–62 | 18–65 | 19–65 | 26–65 | 26–65 | |
| Sputum smear | NA | NA | Positive | NA | NA | |
| Sputum culture | NA | NA | Positive | NA | NA | |
| Infectious organism | NA | NA | Mycobacterium tuberculosis | NA | Streptococcus pneumoniae | |
| TST | < 5 mm | > 5 mm | NA | < 5 mm | < 5 mm | |
| Chest X-Ray | ||||||
| Normal | 25 (100%) | 27 (100%) | 1 (4%) | 14 (100%) | 0 | |
| Cavitation | 0 | 0 | 1 (4%) | 0 | 0 | |
| Consolidation | 0 | 0 | 1 (4%) | 0 | 8 (100%) | |
| Cavitation and consolidation | 0 | 0 | 24 (88%) | 0 | 0 | |
NID, healthy non-infected donors; LTBI, healthy donors latently infected with M. tuberculosis; TB, tuberculosis patients; PN, patients with pneumonia; NA, non applicable; TST, tuberculin skin test.