Figure 2.

Antibiotic susceptibility and ethidium bromide accumulation rate of M. marinum strains. Fold-change in MIC₉₀ values between the WT strain and the mutants (A) or the mutants constitutively expressing an episomal WT copy of the deleted gene (B) are shown. A strain was defined as having an altered antibiotic susceptibility when it displayed >2-fold change (dotted line) relative to WT. The antimicrobial susceptibility results represent means and SEM of three independent experiments. The ethidium bromide (EtBr) accumulation data (C) correspond to means and SEM of five independent experiments.