Figure 6.

Differential cytotoxicity induced by S. aureus isolates and their serially passaged strains. Cytotoxicity induction of S. aureus isolates and serially passaged strains from staphylococcal isolates from the control and CRS groups on human epithelial lung A549 cells. Data are presented as the average of triplicate determinations, and error bars represent the standard deviation. Differences in cell death between the original and serially passed isolates from each pair were analysed by unpaired t tests (* p < 0.05, ** p < 0.01, **** p < 0.01).