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. 2009 Sep 11;191(22):6804–6811. doi: 10.1128/JB.01006-09

FIG. 2.

FIG. 2.

Representative confocal micrographs of 4-h (left column) and 18-h (right column) biofilms showing no growth (top panels, P. gingivalis + S. oralis) and mutualistic growth (middle panels, P. gingivalis + S. gordonii; bottom panels, P. gingivalis + Veillonella sp.) in flow cells inoculated with two species. Bacterial cells were stained with species-specific fluorophore-conjugated immunoglobulin G (red, P. gingivalis; blue, S. oralis/Veillonella sp., green, S. gordonii), and cell-cell contact between species is evident.