Confocal microscopy images of S. mutans UA159 biofilms in the presence of DG-LRE in semi-defined biofilm medium with 20 mM glucose (A) or 20 mM sucrose (B) for 24 h.
The DG-LRE concentration was 0, 4, or 8 mg/ml in the glucose-containing medium and 0, 8, or 16 mg/ml in the sucrose-containing medium. Cells were stained with SYTO 13 for
20 min.