FIG. 4.

Inhibitory effects of C10-CPA on pyocyanin (A), rhamnolipid (B), and elastase (C) production by P. aeruginosa PAO1. PAO1 was cultivated for 24 h without C10-CPA or with 50 to 250 μM C10-CPA. Then concentrations of pyocyanin and rhamnolipid and elastase activity in culture supernatants were measured. Vertical bars represent the standard deviations of measurements done in four separate experiments. Different letters above bars indicate a significant difference (P < 0.01) among the treatments.