TABLE 2.
Sensitivity and specificity of the cascade detection system and PCR for detecting mcr-1, blaNDM, tet(X4)/tet(X6), and blaKPCa
| XDR gene | No. of results |
Sensitivity, % | Specificity, % | |||
|---|---|---|---|---|---|---|
| PCR (+), cascade system (+) | PCR (+), cascade system (−) | PCR (−), cascade system (+) | PCR (−), cascade system (−) | |||
| mcr-1 | 25 | 1 | 1 | 68 | 96.2 (25/25 + 1) | 98.6 (68/68 + 1) |
| bla NDM | 19 | 1 | 1 | 74 | 95.0 (19/19 + 1) | 98.7 (74/74 + 1) |
| tet(X4)/tet(X6) | 23 | 2 | 1 | 69 | 92.0 (23/23 + 2) | 98.6 (69/69 + 1) |
| bla KPC | 21 | 1 | 2 | 71 | 95.5 (21/21 + 1) | 97.3 (71/71 + 2) |
aSensitivity, positive samples detected by both PCR and cascade system/total positive samples; specificity, negative samples detected by both PCR and cascade system/total negative samples.