Sensitivity to H
of the two S. epidermidis strains. Figure 2A displays the growth curve of S. epidermidis ATCC12228 and 2B, that of RP62A. The growth curves were plotted following the OD595 measured every one hour. Overnight bacterial cultures (OD595 approximately 1.2) were added to fresh TSB (Tryptone Soya Broth), and H2O2 at different concentrations (0, 1%, 5%, 10% and 15%) were added at the same time. The culture density was monitored at OD595 followed every one hour.