Effect of<i>bla</i>regulators on the susceptible phenotype and phenotypic conversion for oxacillin-susceptible<i>mecA</i>-positive staphylococcal isolates

Abstract

The expression level of BlaI was mainly responsible for the oxacillin-resistant phenotype in oxacillin-susceptible mecA-positive Staphylococcus without mec regulators. The initial amount of BlaR1 was determinative for the phenotypic conversion speed under β-lactam exposure.