TABLE 4.
Correlation of INNO-LiPA Rif.TB and standard susceptibility tests in the BACTEC 960 system
| INNO-Lipa Rif.TB test result for RIF resistance of M. tuberculosis complexb | No. of isolates with correlation to standard test resulta
|
||
|---|---|---|---|
| Resistant | Susceptible | Total | |
| Resistant | 31 | 0 | 31 |
| RIF Susceptible | 1 | 310 | 311 |
| Total | 32 | 310 | 342 |
a
Susceptibility was determined by the BACTEC MGIT 960 system's indirect susceptibility assay and confirmed by the BACTEC 460TB system's indirect susceptibility assay when necessary.
b
Sensitivity of INNO-LiPA Rif.TB M. tuberculosis complex direct detection of rpoB gene mutations that confer RIF resistance in acid-fast-bacillus-positive respiratory specimens compared to RIF resistance determined by standard indirect susceptibility assays, 96.9%; specificity, 100.0%; positive predictive value, 100.0%; negative predictive value, 99.7%.