Fig. 4

CLSM images of E. faecalis biofilms grown for 48 h and treated with samples for 12 h. Biofilms grown in A BHI, B 1% NaClO, C 3 mg/mL FDCDs. Green is live cells. Red is dead cells. Scale bars = 50 μm. D The average thickness of E. faecalis biofilms. Data are mean ± SD (n = 3) (ns means no significance, *p < 0.05, **p < 0.01)