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Biofilm density after growth in THB plus 1% glucose. Biofilm formation by E. faecalis strains E99, DBS01, and DBS01(pGT101) on polystyrene microtiter plates was assessed by crystal violet staining. Biofilm assays were performed in triplicate, with 12 replicates for each strain per assay. The error bars represent the means ± the standard errors. A Student t test was used to determine significance levels.
