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Antibacterial activity of D2S against biofilm of a mucoidal strain of P. aeruginosa Xen 5, evaluated 4 h after D2S administration. Slopes represent relative values of crystal violet absorbance (•) and luminescence (□) that progressively decrease with addition of D2S. Error bars represent standard deviations from three to five measurements. *, significantly different from samples without D2S addition; OD, optical density.
