Fig. 2

Effect of EOs on pyomelanin and ROS production. (a) Dose-dependent effect of cinnamon, garlic, thyme, clove bud, fennel, davana, and palmarosa EOs on P. aeruginosa U804 pyomelanin production (b) ROS levels in U804 cultures upon treatment with thyme, cinnamon, and garlic EOs using DCFDA assay. Data are shown as mean ± SD. *p < 0.05, **p < 0.01, ***p < 0.001, and ****p < 0.0001 compared with untreated by determining One-way ANOVA.