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Confocal micrographs of biofilms formed in flow cells inoculated with one species after 4 h (left column) and 18 h (right column) of growth on 25% saliva. Top panels, S. oralis; middle panels, A. oris; bottom panels, Veillonella sp. Colonization (4 h) and growth (18 h) of each species were monitored. Bacterial cells are stained with species-specific fluorophore-conjugated immunoglobulin G.
