Table 1 Resistance phenotypes of the tested enterobacterial isolates and negative controls, expressed as MIC ranges of carbapenems obtained at the Vitek II
From: Comparison of phenotypic methods for the detection of carbapenem non-susceptible Enterobacteriaceae
Isolates # | Species | Resistance determinants | Ertapenem MIC range (mg/L) | Imipenem MIC range (mg/L) | Meropenem MIC range (mg/L) |
|---|---|---|---|---|---|
84 | K. pneumoniae | KPC | 4 - > 8 | 4 - > 16 | 2 - > 16 |
2 | E. coli | KPC | ≤ 0,5 - 4 | 8 | 1 |
1 | E. cloacae | KPC | > 8 | > 16 | > 16 |
3 | K. pneumoniae | KPC + VIM | > 8 | > 16 | > 16 |
3 | E. cloacae | VIM | > 8 | > 16 | > 16 |
2 | K. oxytoca | VIM | ≤ 0,5 | 1- > 16 | 1- > 16 |
1 | K. pneumoniae | NDM | > 8 | > 16 | > 16 |
3 | K. pneumoniae | OXA-48 | 4 - > 8 | 2 - > 16 | 1 - 2 |
1 | E. coli | OXA-48 | 1 | 2 | ≤ 0,25 |
1 | E. cloacae | OXA-48 | 2 | 1 | ≤ 0,25 |
2 | E. aerogenes | AmpC | > 8 | > 16 | 8 - > 16 |
2 | E. cloacae | AmpC | 4 | ≤ 0,25 - 1 | ≤ 0,25 |
2 | K. pneumoniae | ESBL | > 8 | 1 | 4 |
1 | E. coli | ESBL | > 8 | > 16 | > 16 |
Controls | |||||
NC1 | E. coli | none | ≤ 0,5 | ≤ 0,25 | ≤ 0,25 |
NC2 | E. cloacae | none | ≤ 0,5 | 0,5 | ≤ 0,25 |
NC3 | E. aerogenes | none | ≤ 0,5 | 2 | ≤ 0,25 |
NC4 | K. pneumoniae | none | ≤ 0,5 | ≤ 0,25 | ≤ 0,25 |
NC5 | K. oxytoca | none | ≤ 0,5 | 0,5 | ≤ 0,25 |