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Number of isolates showing positive AmpC by all three methods
| Phenotypic methods | No. of strains | PCR |
|---|---|---|
| Meropenem+boronic acid/ Meropenem+cloxacillin | 3 | 1 |
| Cefoxitine/ cefepime | 8 | 2 |
| Strains without positive results in both phenotypic methods | 292 | 2 |
| Total | 303 | 5 |
