Driving Forces of Mechanisms Regulating Oxacillin-Resistance Phenotypes of MRSA: Truly Oxacillin-Susceptible mecA-Positive Staphylococcus aureus Clinical Isolates also Exist.

Abstract excerpt

As MRSA are considered Staphylococcus aureus isolates with oxacillin minimum inhibitory concentration (MIC) of ≥4 mg/L or harboring the mecA gene. However, the presence of mecA does not necessarily lead to oxacillin resistance and mecA gene-carrying isolates may have oxacillin MIC within the susceptible range (≥2 mg/L). During the last few years it has become apparent that oxacillin-susceptible (OS)...

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