Table 2.
Comparison between GeneXpert MTB/RIF and culture resultsa
| Sample type or AFB result | Culture result | No. with indicated result in GeneXpert MTB/RIF |
||
|---|---|---|---|---|
| Negative | Positive | Invalid | ||
| All samples (n = 121) | Negative | 65 | 5 | 2 |
| M. tuberculosis | 3 | 32 | ||
| M. avium | 1 | |||
| Contaminated | 12 | 1 | ||
| Pulmonary (n = 80) | Negative | 32 | 2 | 2 |
| M. tuberculosis | 3 | 29 | ||
| M. avium | 1 | |||
| Contaminated | 10 | 1 | ||
| Extrapulmonary (n = 41) | Negative | 33 | 3 | |
| M. tuberculosis | 3 | |||
| Contaminated | 2 | |||
| AFB negative (n = 105) | Negative | 64 | 5 | 1 |
| M. tuberculosis | 3 | 19 | ||
| M. avium | 1 | |||
| Contaminated | 12 | |||
| AFB positive (n = 15) | Negative | 1 | 1 | |
| M. tuberculosis | 12 | |||
| Contaminated | 1 | |||
| AFB suspicious (n = 1) | M. tuberculosis | 1 | ||
a
One patient with an Xpert MTB/RIF-positive/culture-negative result had a subsequent culture-positive sample that was taken into consideration in the final test analysis.