Table 5 Discrepant results between the BYG Carba v2.0 test and the reference method.
N° | Species | Carbapenemase | First testing | Confirmation in centre A | Additional hydrolysis testing | ||||
|---|---|---|---|---|---|---|---|---|---|
BYG value at 30 min (AU) | Result | Time to pos (min) | BYG value at 30 min (AU) repeat | Time to pos (min) repeat | Result repeat | Carba NP test | |||
1 | Enterobacter cloacae | GES-5 | 0.4 | FN | — | 4.6 | — | FN | POS |
2 | Enterobacter cloacae | GES-5 | 2.9 | FN | — | −4.3 | — | FN | POS |
3 | Klebsiella oxytoca | GES-5 | −1.3 | FN | - | 0.8 | — | FN | NEG |
4 | Klebsiella oxytoca | GES-5 | −0.5 | FN | — | 12.3 | 28 | TP | POS |
5 | Enterobacter cloacae | IMI-1 | −5.0 | FN | — | 94.0 | 6 | TP | POS |
6 | Enterobacter cloacae | IMI-2 | 11.0 | FN | — | 0.4 | — | FN | NEG |
7 | Escherichia coli | IMP-1 | 2.0 | FN | — | −0.2 | — | FN | POS |
8 | Enterobacter cloacae | IMP-1 | 6.1 | FN | — | 12.1 | 27 | TP | NEG |
9 | Providencia stuartii | NDM-1 | 1.9 | FN | — | −1.6 | — | FN | NEG |
10 | Providencia rettgeri | NDM-1 | 9.3 | FN | — | 11.4 | — | FN | NEG |
11 | Klebsiella oxytoca | NDM-1 * | 8.4 | FN | — | 0.9 | — | TN | NEG |
12 | Proteus mirabilis | NDM-1 | 3.9 | FN | — | 14.9 | 24 | TP | POS |
13 | Klebsiella pneumoniae | OXA-181 | 3.1 | FN | — | 3.5 | — | FN | NEG |
14 | Escherichia coli | OXA-244 | 0.9 | FN | — | 2.2 | — | FN | NEG |
15 | Escherichia coli | OXA-244 | 1.2 | FN | — | 3.1 | — | FN | NEG |
16 | Escherichia coli | OXA-244 | 3.7 | FN | — | 16.3 | 24 | TP | POS |
17 | Escherichia coli | OXA-48 | 9.4 | FN | — | 8.8 | — | FN | POS |
18 | Enterobacter cloacae | VIM-1 | 6.8 | FN | — | 6.0 | — | FN | NEG |
19 | Providencia stuartii | NDM | −0.1 | FN | — | 32.5 | 16 | TP | NEG |
20 | Klebsiella oxytoca | OXA-232 | −4.1 | FN | — | 1.2 | — | FN | POS |
21 | Escherichia coli | OXA-244 | 1.1 | FN | — | 0.8 | — | FN | POS |
22 | Escherichia coli | OXA-48 | 3.6 | FN | — | 71.4 | 6 | TP | POS |
23 | Escherichia coli | OXA-48 * | 0.2 | FN | — | −1.1 | — | TN | NEG |
24 | Klebsiella pneumoniae | OXA-48 | 10.3 | FN | — | 10.0 | — | FN | NEG |
25 | Enterobacter cloacae | VIM-1 | 8.0 | FN | — | 9.1 | — | FN | POS |
26 | Escherichia coli | VIM-4 | 1.1 | FN | — | 8.2 | — | FN | POS |
27 | Enterobacter cloacae | No Carba (SHV-12) | 15.8 | FP | 20 | 1.1 and 4.1 | — | TN | NEG |
