Fig 5.

Bactericidal effect of high concentrations of H₂O₂ with EIP-K on a resistant E. coli strain. White bars, control (untreated; time zero); light-gray bars, treated for 10 min with H₂O₂ at the indicated concentration; dark-gray bars, treated for 10 min with H₂O₂ at the indicated concentration plus 13.75 mM EIP-K. The values are means and standard errors of the mean for three experiments, each run in triplicate. Two-way ANOVA shows a significant treatment effect (F_[2,13] = 96.02; P = 0.0000001), a significant concentration effect (F_[2,13] = 57.15; P = 0.0000001), and a significant treatment-concentration interaction effect (F_[4,13] = 26.87; P = 0.000004). The asterisks indicate that the effect of EIP-K plus H₂O₂ on the resistant strain is significantly affected by the concentration of H₂O₂.