Table 2 Summary of Ambler Class A and C phenotypes and genotypes in ESC-resistant E. coli and K. pneumoniae isolates
| Â | Amber Class Phenotype | ||||||
|---|---|---|---|---|---|---|---|
E. coli (n = 97) | K. pneumoniae (n = 17) | Both species (n = 114) | Total | ||||
A (n = 74) | C (n = 23) | A (n = 14) | C (n = 3) | A (n = 88) | C (n = 26) | (n = 114) | |
Ambler Class A genes | |||||||
 blaCTX-M positivea | 73 (99%) | 18 (78%) | 14 (100%) | 2 (67%) | 87 (99%) | 20 (77%) | 107 (94%) |
  CTX-M-14 | 14 | 1 | 2 | 0 | 16 | 1 | 17 |
  CTX-M-15 | 28 | 13 | 12 | 0 | 40 | 13 | 53 |
  CTX-M-24 | 2 | 1 | 0 | 0 | 2 | 1 | 3 |
  CTX-M-27 | 12 | 0 | 0 | 2 | 12 | 2 | 14 |
  CTX-M-55 | 20 | 4 | 0 | 0 | 20 | 4 | 24 |
  Total | 76 | 19 | 14 | 2 | 90 | 21 | 111 |
 blaSHV positive | 0 (0%) | 0 (0%) | 12 (86%) | 2 (67%) | 12 (14%) | 2 (8%) | 14 (12%) |
  SHV-1/1-likec | 0 | 0 | 2 | 1 | 2 | 1 | 3 |
  SHV-11/11-likec | 0 | 0 | 2 | 1 | 2 | 1 | 3 |
  SHV-27b | 0 | 0 | 1 | 0 | 1 | 0 | 1 |
  SHV-28b | 0 | 0 | 1 | 0 | 1 | 0 | 1 |
  SHV-33c | 0 | 0 | 3 | 0 | 3 | 0 | 3 |
  SHV-83c | 0 | 0 | 1 | 0 | 1 | 0 | 1 |
  SHV-99/99-likeb | 0 | 0 | 1 | 0 | 1 | 0 | 1 |
  SHV-142d | 0 | 0 | 1 | 0 | 1 | 0 | 1 |
  Total | 0 | 0 | 12 | 2 | 12 | 2 | 14 |
 blaVEB positive | 1 (1%) | 0 (0%) | 0 (0%) | 0 (0%) | 1 (1%) | 0 (0%) | 1 (1%) |
 None identified | 0 | 5 (22%) | 0 (0%) | 0 (0%) | 0 (0%) | 0 (0%) | 5 (4%) |
Ambler Class C genes | |||||||
 blaCMY-2 positive | 0 (0%) | 8 (35%) | 0 (0%) | 0 (0%) | 0 (0%) | 8 (31%) | 8 (31%) |
 blaDHA positive | 0 (0%) | 1 (4%) | 0 (0%) | 1 (33%) | 0 (0%) | 2 (8%) | 2 (8%) |
 blaACT-like positive | 0 (0%) | 0 (0%) | 0 (0%) | 0 (0%) | 0 (0%) | 0 (0%) | 0 (0%) |
 None identified | 0 (0%) | 14 (61%) | 0 (0%) | 2 (67%) | 0 (0%) | 16 (62%) | 16 (62%) |