title: [Prevalence of subgingival microbiota in Chinese using checkerboard DNA-DNA hybridization].
abstract: OBJECTIVE
  To evaluate the prevalence of subgingival taxa of periodontal healthy persons and rapidly progressive periodontitis (RPP) patients using checkerboard DNA-DNA hybridization and to find the main pathogens in RPP.
  
  
  METHODS
  Eighty four subgingival plaque DNA samples taken from 5 healthy subjects (H) and 6 RPP patients were hybridizated with 37 bacterial probes.
  
  
  RESULTS
  The detection frequences of 6 bacteria (E. corrodens, et al.) were greater than 90%. Suspected periodontal pathogens, e.g. A. actinomycetemcomitans seratype b, T. denticola, F. nucleatum as nucleatum, B. forsythus, P. nigrescens, W. succinogenes, C. rectus, P. micros, S. intermedius and P. gingivalis were significantly more frequently found in RPP group than in H group. The mean counts of these pathogens were significantly more elevated in RPP group than in H group.
  
  
  CONCLUSIONS
  It is suggested that periodontal destruction occurrence requires the pathogens in sufficient number at the site, RPP may be resulted from several pathogens.
authors.affiliation: School of Stomatology, Beijing Medical University, Beijing 100081.
authors.forename: H
authors.initials: H
authors.lastname: Meng
authors.forename: X
authors.initials: X
authors.lastname: Zhu
authors.forename: W
authors.initials: W
authors.lastname: Hu
mesh_terms: D000328:Adult; D001419:Bacteria / Q000302:isolation & purification*; D004269:DNA, Bacterial / Q000032:analysis*; D005881:Gingiva / Q000382:microbiology*; D006801:Humans; D009693:Nucleic Acid Hybridization; D010518:Periodontitis / Q000382:microbiology
chemical_list: D004269:DNA, Bacterial