Figure 1

Coaggregation between S. gordonii DL1 and V. parvula PK1910. Pico-green-stained S. gordonii cells (green) and propidium iodide-stained V. parvula PK1910 (red) were suspended in human saliva and mixed vigorously to induce coaggregation. Samples were visualized by confocal laser scanning microscopy. A large coaggregated mass is clearly visible, containing S. gordonii and V. parvula cells interspersed throughout the structure. Bar = 30 µm.