FIG 2 .

Interpersonal and intrapersonal beta diversity of the subgingival microbiome. (a) Principal coordinate analysis (PCoA) shows that the microbiomes of diseased samples and resolved samples were significantly different. (b) The diseased samples were more similar to each other than the resolved samples in both interpersonal and intrapersonal comparisons. Sites from the same individual were significantly more similar to each other in the diseased state (before treatment), but not in the resolved state (after treatment). Data are represented as means plus SEMs (error bars). Values that are significantly different (P < 0.01) are indicated by a bar and asterisk; values that are not significantly different (P > 0.05) are indicated by a bar labeled NS.