FIG. 2.

Biofilm formation by E. faecalis BS4126, BS12297, BS385, BS1037, BS11297, and BS937 after 2 h of adhesion in the microtiter plate wells. The ability of the strains to form biofilms was expressed relative to the biofilm-forming ability of E. faecalis BS4126 in TSB containing 0.5% glucose. Biofilms were grown for 24 h in TSB containing 0.5% glucose in the absence (A) and presence (B) of 50 mg/ml ox bile. Heterogeneous strains are indicated in black and homogeneous strains in white. All data represent the means ± standard deviations for 15 determinations (three independent experiments, each performed five times).