MVs quantification. MVs P. aeruginosa WT and ∆mlaA in the presence and absence of 3’,6-dinonyl neamine (1× MIC, 2 mg/L, 1 h) were analyzed using a nanoparticle tracking analyzer. (A) Number of MVs produced per colony forming unit (CFU). (B) MVs size distribution in nanometers (nm). Figure 6B was used to calculate the mean size of the membrane vesicles, which is shown in (C). Statistical analysis was performed by one-way ANOVA with Tukey’s multiple-comparison test. ****P < 0.0001, **P < 0.01, *P < 0.05; nsp >0.05.