Figure 5.

Effect of Coa on bacterial resistance to H₂O₂. (A) Percent survival of wild-type USA300 CA-MRSA 923, coa deletion mutant and complementation strain after exposure of H₂O₂. (B) Percent survival of wild-type S. epidermiditis and coa expression strain in trans after exposure of H₂O₂. The bacterial strains were cultured with appropriate antibiotics. Approximately 5 × 10⁸ CFU were incubated in sterile PBS with 1.5% hydrogen peroxide at 37°C for 1 h. The percent survival was calculated as (#CFU_final/#CFU_input)^*100. The data represents the mean ± SEM of at least four independent experiments.