Effect of oxacillin on clinically isolated strains. (A) Effect of different oxacillin concentrations on the cell growth of clinical strains. (B) Effect of different oxacillin concentrations on the biofilm formation of clinical strains. The strains were classified into three groups: the high-resistance (MRSA8471 and MRSA9291), intermediate-resistance (MRSA2065, MRSA6288, MRSA7557, MRSA12779, MRSA14278, and MRSA14459), and sensitive (MRSA6230 and MRSA7875) groups. The error bars represent the standard deviation of three replicates for all strains. The averages of cell growth and biofilm for each group were calculated, and the results are simplified in the figures.