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Phenotypic screening of extended-spectrum beta-lactamase Escherichia coli
| Type of samples | CDDT method | DDST method | Ezy MIC strip |
|---|---|---|---|
| Positive samples | 135 | 115 | 84 |
| Negative samples | 0 | 20 | 51 |
| Total number of samples | 135 | 135 | 135 |
| Percentage sensitivity | 100 | 85 | 62 |
| χ2 | 67.7** | ||
**P<0.01 results are highly significant.DDST: Double-disc synergy test, CDDT: Combined disc diffusion test, MIC: Minimum inhibitory concentration
