Table 4 One hundred and nine K. pneumoniae isolates classified according to their beta-lactamase phenotype including the detected resistance mechanisms against beta-lactams and aminoglycosides by LC–MS/MS.
Phenotype | n | Antibiotics | PEN/OXA | ESBL | AmpC | CPE | 16S-RMTase | AAC | |||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
CRX | CAZ | MEM | GEN | TOB | CIP | TEM | SHV | OXA-1 | OXA-9 | CTX-M | CMY | DHA | OXA-48 | NDM | KPC | VIM | AAC(3) | AAC(6′) | |||
WT/PEN/OXA | 27 | S | S | S | S | S | S/R | 2 | 4 | – | – | – | – | – | 5 | – | – | – | – | – | – |
WT/PEN/OXA/AME | 2 | S | S | S | R | S | S | – | 1 | – | – | – | – | – | – | – | – | – | – | 2 | – |
ESBL/AmpC | 2 | R | R | S | S | S | S/R | 1 | 2 | – | – | 2 | – | – | – | – | – | – | – | – | – |
ESBL/AmpC/AME | 10 | R | S/R | S | R | S/R | S/R | 7 | 2 | 6 | – | 10 | – | – | – | – | – | – | – | 9 | 6 |
CRE/Quin | 4 | R | R | S/R | S | S | R | 3 | 2 | – | – | 1 | 1 | – | – | – | 3 | – | – | – | – |
CRE/AME | 6 | R | R | S/R | S/R | S/R | S/R | 1 | 1 | 2 | – | 2 | 1 | – | 2 | – | – | 4 | – | – | 2 |
CRE/AME/Quin | 58 | R | R | S/R | S/R | R | R | 28 | 18 | 23 | 5 | 35 | 6 | 2 | 13 | 18 | 19 | 9 | 15 | 28 | 29 |