TABLE 1.
Distribution of ESBL genotypes in bacterial isolates used for validation of test methods
| Strain group and genotype(s) | No. of isolates |
||||
|---|---|---|---|---|---|
| Klebsiella pneumoniae (n = 141) | Klebsiella oxytoca (n = 2) | Escherichia coli (n = 6) | Enterobacter aerogenes (n = 6) | Total (n = 155) | |
| ESBL-producing isolatesa | |||||
| blaCTX-M-3 | 3 | 3 | |||
| blaCTX-M-15 | 9 | 1 | 10 | ||
| blaSHV-5 | 5 | 5 | |||
| blaSHV-12 | 94 | 2 | 2 | 98 | |
| blaSHV-12 + blaCTX-M-15 | 2 | 2 | |||
| Subtotal | 113 | 2 | 1 | 2 | 118 |
| Non-ESBL- producing isolatesb | 28 | 0 | 5 | 4 | 37 |
| Total | 141 | 2 | 6 | 6 | 155 |
a
Of the ESBL-producing isolates, 77 contained blaTEM-1.
b
Of the non-ESBL-producing isolates, 24 contained blaTEM-1 and 5 contained blaSHV-11.