TABLE 2.
O serogroups and CTX-M types of nonduplicate 145 ESBL-producing E. coli isolates
| Serogroup | No. (%) of isolates of each CTX-M type |
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| CTX-M-1 group |
CTX-M-2 group, CTX-M-2 | CTX-M-8 group, CTX-M-8 | CTX-M-9 group |
Non-CTX-Ma | Total | |||||
| CTX-M-1 | CTX-M-15 | CTX-M-3 | CTX-M-55 | CTX-M-14 | CTX-M-27 | |||||
| O1 | 3 | 2b | 5 | 1 | 11 (7.6) | |||||
| O8 | 3 | 1 | 1 | 5 (3.4) | ||||||
| O15 | 2 | 1 | 3 (2.1) | |||||||
| O18 | 1 | 1 (0.7) | ||||||||
| O25 | 1 | 1 | 1 | 1 | 7 | 16 | 27 (18.6) | |||
| O27 | 1 | 1 (0.7) | ||||||||
| O29 | 1 | 1 | 2 (1.4) | |||||||
| O74 | 1 | 4 | 5 (3.4) | |||||||
| O78 | 3 | 1 | 4 (2.8) | |||||||
| O86a | 1 | 1 (0.7) | ||||||||
| O125 | 1 | 2 | 1 | 4 (2.8) | ||||||
| O128 | 1 | 1 | 2 (1.4) | |||||||
| O142 | 3 | 3 (2.1) | ||||||||
| O148 | 1 | 1 (0.7) | ||||||||
| O153 | 1 | 1 | 5 | 1 | 8 (5.5) | |||||
| O157 | 1c | 1 (0.7) | ||||||||
| O166 | 1 | 1 (0.7) | ||||||||
| O169 | 1 | 1 | 2 (1.4) | |||||||
| OUT | 2 | 11 | 1 | 11 | 3 | 30 | 1 | 4 | 63 (43.4) | |
| Total | 2 (1.4) | 26 (17.9) | 1 (0.7) | 1 (0.7) | 19 (13.1) | 7 (4.8) | 63 (43.5) | 19 (13.1) | 7 (4.8) | 145 (100) |
a
Isolates harboring a blaSHV-5-group gene, such as blaSHV-12.
b
One of the two isolates harbored both the blaCTX-M-8 and blaTEM-52 genes.
c
This isolate did not harbor genes for Shiga-like toxins.