Figure 1.

CSY0073 does not inhibit the growth of Pseudomonas aeruginosa, Staphylococcus aureus or Haemophilus influenzae. The antibacterial activities of increasing concentrations (0.1–100 μM) of CSY0073 (CSY) and AZM were determined in liquid cultures of P. aeruginosa (PAK) (A), S. aureus (Newman) (B), and H. influenza (NTHI) (C) strains. The drugs and pathogens were incubated for 6 h and the OD was then measured. Data are mean ± SEM values (% of the baseline) of four independent experiments. Statistical analysis was done by use of anova followed by Dunnett's multiple comparison test. **P < 0.01, ***P < 0.001 and ****P < 0.0001. Each value was compared with the control (V: citric acid).