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| Resistance mechanism | Number and (%) isolates | ||||||
|---|---|---|---|---|---|---|---|
|
| |||||||
| Imipenem | Meropenem | ||||||
|
|
|
||||||
| R (10) | S (25) | p | R (7) | S (28) | p | ||
| Efflux system | 6 (60) | 1 (4) | 0.001 | 4 (57) | 3 (11) | 0.03 | |
| AmpC | 6 (60) | 4 (16) | 0.03 | 4 (57) | 6 (21) | 0.16 | |
| oprD mutation | 10 (100) | 0 (0) | < 0.001 | 7 (100) | 3 (11) | < 0.001 | |
R: resistant; S: susceptible.
