CHG MIC distribution of the 1,050 cutaneous Staphylococcus isolates included in our study, grouped by species (a), qacA/B PCR and RFLP patterns (b), and smr PCR results (c). The dashed line indicates the concentration that we defined as an elevated CHG MIC (≥4 μg/ml). MALDI ID, species identified by MALDI-TOF MS.