Bacterial isolates | Enzyme variants Ambler classification | Carbapenemase variants—genotyped | MALDI-TOF MS-based imipenem hydrolysis assay |
---|---|---|---|
Solid culture media | |||
A. baumannii | B (n = 9) | NDM-1a (n = 7) | (n = 7) |
GIM-1 (n = 1) | (n = 1) | ||
VIM-2 (n = 1) | (n = 1) | ||
A. baumannii | D (n = 29) | OXA-23 (n = 19) | (n = 19) |
OXA-40 (n = 1) | (n = 1) | ||
OXA-58 (n = 3) | (n = 3) | ||
OXA-72 (n = 4) | (n = 3) | ||
OXA-164 (n = 2) | (n = 2) | ||
E. coli | A (n = 2) | KPC-2 (n = 2) | (n = 2) |
K. pneumoniae | A (n = 3) | KPC-3 (n = 3) | (n = 3) |
E. cloacae | B (n = 2) | IMP-4, IMP-14 (n = 2) | (n = 2) |
S. marcescens | B (n = 1) | IMP-13 | (n = 1) |
E. cloacae | B (n = 1) | NDM-1a (n = 1) | (n = 1) |
E. coli | B (n = 2) | NDM-1a, -3 (n = 2) | (n = 2) |
K. pneumoniae | B (n = 1) | NDM-1a (n = 1) | (n = 1) |
K. pneumoniae | B (n = 2) | VIM-2 (n = 2) | (n = 2) |
K. oxytoca | B (n = 1) | VIM-1, (n = 1) | (n = 1) |
E. cloacae | B (n = 1) | VIM-4 (n = 1) | (n = 1) |
P. aeruginosa | B (n = 2) | VIM-2 (n = 2) | (n = 2) |
K. pneumoniae | D (n = 4) | OXA-48 (n = 4) | (n = 4) |
C. freundii | D (n = 1) | OXA-162 (n = 1) | (n = 1) |
E. coli | D (n = 1) | OXA-181 (n = 1) | (n = 1) |
K. pneumoniae | D (n = 1) | OXA-204 (n = 1) | (n = 1) |
Blood culture vials | |||
A. baumannii | B (n = 9) | NDM-1a (n = 7) | (n = 2) |
GIM-1 (n = 1) | (n = 1) | ||
VIM-2 (n = 1) | None | ||
A. baumannii | D (n = 29) | OXA-23 (n = 19) | (n = 15) |
OXA-40 (n = 1) | None | ||
OXA-58 (n = 3) | (n = 3) | ||
OXA-72 (n = 4) | (n = 3) | ||
OXA-164 (n = 2) | None | ||
E. coli | A (n = 2) | KPC-2 (n = 2) | (n = 2) |
K. pneumoniae | A (n = 3) | KPC-3 (n = 3) | (n = 3) |
E. cloacae | B (n = 2) | IMP-4, IMP-14 (n = 2) | (n = 2) |
S. marcescens | B (n = 1) | IMP-13 | (n = 1) |
E. cloacae | B (n = 1) | NDM-1a (n = 1) | (n = 1) |
E. coli | B (n = 2) | NDM-1a, −3 (n = 2) | (n = 2) |
K. pneumoniae | B (n = 1) | NDM-1a (n = 1) | (n = 1) |
K. pneumoniae | B (n = 2) | VIM-2 (n = 2) | (n = 2) |
K. oxytoca | B (n = 1) | VIM-1, (n = 1) | (n = 1) |
E. cloacae | B (n = 1) | VIM-4 (n = 1) | (n = 1) |
P. aeruginosa | B (n = 2) | VIM-2 (n = 2) | (n = 2) |
K. pneumoniae | D (n = 4) | OXA-48 (n = 4) | (n = 3) |
C. freundii | D (n = 1) | OXA-162 (n = 1) | (n = 1) |
E. coli | D (n = 1) | OXA-181 (n = 1) | (n = 1) |
K. pneumoniae | D (n = 1) | OXA-204 (n = 1) | (n = 1) |