TABLE 5.
Discrepant testing resultsa
| Sample | Reference method |
Target(s) detected by Xpert Carba-R assay | Discrepant analysis |
||
|---|---|---|---|---|---|
| Culture | Sequencing of isolate | DNA extraction and sequencing of MacConkey broth | Outcomeb | ||
| A | No isolate | NAc | IMP-1 | IMP-1 | TP |
| B | Acinetobacter baumannii | No bandsd | KPC | KPC | TP |
| C | Klebsiella pneumoniae | OXA-48 | OXA-48, VIM | OXA-48, VIM | TP |
| D | No isolate | NA | OXA-48 | OXA-48 | TP |
| E | Klebsiella pneumoniae | OXA-48 | OXA-48, VIM | OXA-48, VIM | TP |
| F | No isolate | NA | VIM | VIM | TP |
| G | No isolate | NA | KPC | KPC | TP |
| H | No isolate | NA | OXA-48, VIM | OXA-48, VIM | TP |
| I | No isolate | NA | OXA-48 | OXA-48 | TP |
| J | Enterobacter cloacae | KPC | KPC, NDM | KPC, NDM | TP |
| K | Klebsiella pneumoniae | OXA-48 | OXA-48, VIM | OXA-48, VIM | TP |
| L | No isolate | NA | KPC | No target gene | FP |
| M | No isolate | NA | NDM | No target gene | FP |
| N | No isolate | NA | VIM | No target gene | FP |
| O | No isolate | NA | KPC | No target gene | FP |
| P | No isolate | NA | KPC | No target gene | FP |
| Q | No isolate | NA | KPC | No target gene | FP |
| R | No isolate | NA | OXA-48 | No target gene | FP |
a
True-positive and false-positive results are shown.
b
TP, true positive; FP, false positive.
c
NA, not applicable.
d
No bands indicate that the sample did not meet PCR product band size inclusion criteria.