Table 4.
Summary of results
| Characteristic | No. (%) of isolates |
|---|---|
| Candidate ESBL isolates | 632 |
| Confirmed by CLSI ESBL test | 617a |
| CTX-M-1 group | 387 (62.7) |
| CTX-M-9 group | 148 (24.0) |
| SHV-5 and/or SHV-12 group | 80 (13.0) |
| VEB group | 2 (0.3) |
| Multiple genes | 34 (5.5) |
| Multiple ESBL genes | 19 |
| (blaCTX-M-1 + blaCTX-M-9) E. coli | 3 |
| (blaCTX-M-1 + blaCTX-M-9) K. pneumoniae | 3 |
| (blaCTX-M-1 + blaSHV-5/12) E. coli | 4 |
| (blaCTX-M-1 + blaSHV-5/12) K. pneumoniae | 1 |
| (blaCTX-M-9 + blaSHV-5/12) K. pneumoniae | 5 |
| (blaCTX-M-9 + blaSHV-5/12) E. cloacae | 3 |
| ESBL + AmpCb | 11 |
| (DHA-1 + CTX-M-1) K. pneumoniae | 6 |
| (DHA-1 + SHV-5/12) K. pneumoniae | 1 |
| (CMY-2 + CTX-M-1) E. coli | 3 |
| (CMY-2 + SHV-5/12) K. pneumoniae | 1 |
| ESBL + MBLc | 4 |
| (IMP-4 + CTX-M-1) E. coli | 2 |
| (IMP-4 + SHV-5/12) K. pneumoniae | 1 |
| (IMP-4 + SHV-5/12) E. cloacae | 1 |
a
Numbers and percentages below this point refer to the 617 isolates confirmed with ESBLs by the CLSI test, all of which were subjected to PCR testing.
b
ESBL with AmpC in same isolate.
c
ESBL with MBL in same isolate.