FIG 3 .

Disease-associated and health-associated subgingival microorganisms. On the basis of their relative abundance, the subgingival microorganisms were clustered into disease-associated and health-associated groups, as shown by the dendrogram on the left. The branches in the dendrogram are colored according to the bacterial complex designations of Socransky et al. (13). Genera are indicated with asterisks if they were significantly more abundant in the diseased state (red) or in the resolved state (green). The paired samples, collected before and after treatment at the same tooth sites, are ordered in the same way in the diseased group and the resolved group. Relative abundance is indicated by a gradient of grey shades from white to black.