Fig. 2

Concentration-dependent effect of azithromycin (0–32 µg/mL) on A P. aeruginosa growth after 24 h incubation. B Level of pyoverdine (µM) production by P. aeruginosa after 24 h incubation. Error bars indicate SD from three independent replicates. Data was analysed by one-way ANOVA followed by the Dunnett test as post-hoc. Significance in comparison to control is expressed as ^** P-value ≤ 0.01, ^*** P-value ≤ 0.001, ^**** P-value ≤ 0.0001