Table 3.
Bacteriuma | ESBL genotype (no. of isolates) | No. of isolates with the indicated susceptibility pattern | Cephalosporin susceptibility patternb |
||
---|---|---|---|---|---|
Ceftazidime | Cefepime | Aztreonam | |||
E. coli (n = 155) | CTX-M-9 group (99) | 22 | S | S | S |
13 | R | R | R | ||
12 | S | S | R | ||
11 | I | R | R | ||
11 | S | S | I | ||
10 | S | I | R | ||
5 | S | I | I | ||
4 | R | S | R | ||
3 | S | R | R | ||
3 | I | I | R | ||
3 | I | S | R | ||
2 | R | I | R | ||
CTX-M-1 group (40) | 20 | R | R | R | |
8 | R | I | R | ||
4 | S | S | R | ||
4 | R | S | R | ||
1 | I | I | R | ||
1 | I | S | I | ||
1 | I | S | R | ||
1 | S | I | R | ||
CTX-M-1 group + CTX-M-9 group (13) | 5 | R | R | R | |
3 | R | I | R | ||
2 | S | I | R | ||
1 | R | S | R | ||
1 | S | S | R | ||
1 | I | R | R | ||
CTX-M-9 group + CTX-M-25 group (3) | 2 | R | R | R | |
1 | S | S | S | ||
K. pneumoniae | CTX-M-1 group (67) (n = 150) | 57 | R | R | R |
6 | R | I | R | ||
1 | R | S | R | ||
1 | S | S | I | ||
1 | I | R | R | ||
1 | S | S | S | ||
CTX-M-9 group (30) | 7 | R | I | R | |
6 | S | S | I | ||
4 | R | R | R | ||
3 | I | R | R | ||
3 | R | S | R | ||
2 | I | I | R | ||
2 | S | S | R | ||
1 | S | I | R | ||
1 | I | S | I | ||
1 | S | S | S | ||
CTX-M-1 group + SHV (16) | 13 | R | R | R | |
1 | R | I | R | ||
1 | R | S | R | ||
1 | S | S | I | ||
CTX-M-9 group + SHV (13) | 9 | R | I | R | |
2 | R | R | R | ||
2 | R | S | R | ||
CTX-M-1 group + CTX-M-9 group (12) | 11 | R | R | R | |
1 | I | S | R | ||
SHV alone (7) | 5 | R | S | R | |
2 | R | I | R | ||
CTX-M-1 group + CTX-M-9 group + SHV (5) | 3 | R | R | R | |
2 | R | I | R | ||
P. mirabilis (n = 58) | CTX-M-9 group (51) | 44 | S | S | S |
5 | S | I | S | ||
1 | S | R | S | ||
1 | I | I | S | ||
CTX-M-1 group (3) | 2 | S | S | S | |
1 | R | I | R | ||
CTX-M-1 group CTX-M-9 group (4) | 2 | S | S | S | |
2 | I | S | S |
Genotypes could not be determined in 3 strains of E. coli, 14 of K. pneumoniae, and 2 of P. mirabilis.
S, susceptible; R, resistant; I, intermediate.