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Effects of chelerythrine on biofilm formation of mono- and dual-species of S. aureus ATCC 25,923 and S. lugdunensis ATCC 700,328. Relative biomass of biofilms was determined in the presence of chelerythrine at the concentrations of 0, 1/16 MIC, 1/8 MIC, 1/4 MIC, 1/2 MIC and MIC in 96-well plates by crystal violet staining. Values represent the means of triplicate measurements. Bars represent the standard deviation (n = 3). *P < 0.05; **P < 0.01; ***P < 0.001
