Table 2.
Multiplex PCR results in extrapulmonary tuberculosis in comparison to other modalities of diagnosing tuberculosis.
| Sample type | PCR positive, n = 67 (45.3%) |
PCR Negative, n = 81 (54.7%) |
||||
|---|---|---|---|---|---|---|
| Microbiology smear/culture positive | Microbiology negative, histopathology/clinical/radiology positive | All negative | Microbiology smear/cuture positive | Microbiology negative, histopathology/clinical/radiology positive | All neg | |
| Body fluid (n = 30) | 4 | 4 | 3 | 1 | 0 | 18 |
| Tissue (n = 46) | 12 | 5 | 4 | 1a | 1 | 23 |
| Pus/aspirate (n = 61) | 25 | 6 | 3 | 3 + 1a | 0 | 23b |
| Urine (n = 11) | 0 | 1 | 0 | 0 | 0 | 10 |
| Total (n = 148) | 41 (61.2%) | 16 (23.9%) | 10(14.9%) | 6 (7.4%) | 1 (1.2%) | 74 (91.4%) |
PCR, polymerase chain reaction; NTM, nontuberculous mycobacteria.
a
Smear positive, grew NTM on culture.
b
4 pus samples out of 23 had grown NTM on culture.