Relationship between oral health and bacterial colonization in patients with periodontal disease using real-time PCR

Among all other strains within the same group, the strains that demonstrated significant static correlations as indicators of influence were T. denticola from the red complex and F. nucleatum from the orange complex. Particularly, P. nigrescens from the orange complex exhibited significant static correlations with all strains classified in the red and green complexes, suggesting its role as a connecting link between complexes. The quantity of pathogenic microorganisms based on individual characteristics showed differences in orange complex E. nodatum based on age and alcohol consumption in the BGI-DL/MB group, differences in green complex E. corrodens based on hypertension and diabetes in the BGI-DL/LB group, and differences in P. gingivalis from the red complex based on stress perception in the BGI-H group and P. nigrescens from the orange complex based on stress perception in the BGI-LB group.