FIG. 1.

Biofilm assay for staphylococcal strains. Biofilms were grown in 96-well microtiter plates for 16 h at 37°C, and adherent cells were stained with crystal violet as described in Materials and Methods. The values represented are the means ± standard errors of the means of the results of two experiments done in duplicate plates. In each plate, four wells were used for the assay.