Figure 2.

Matrix of Pearson correlations among 11 periodontal bacteria grouped according to evidence for pathogenesis and/or membership in microbial community complexes as previously described (Socransky et al. 1998). Consensus periodontal pathogens defined by the 1996 World Workshop in Periodontics: Aggregatibacter actinomycetemcomitans (Aa), Porphyromonas gingivalis (Pg), and Tannerella forsythia (Tf); red complex species include Pg, Tf, and Treponema denticola (Td). Orange complex species include Campylobacter rectus (Cr), Fusobacterium nucleatum (Fn), Parvimonas micra (Pm), and Prevotella intermedia (Pi). Eikenella corrodens (Ec) has green complex membership. Actinomyces naeslundii (An) clusters with Actinomyces species. Veillonella parvula (Vp) has purple complex membership. For pairwise correlations, all P values <0.0001. Results from 297 participants (1,188 dental plaques) enrolled in the Oral Infections, Glucose Intolerance and Insulin Resistance Study, 2011–2013.