title: [Prevalence of putative periodontal microorganisms in Chinese patients with aggressive periodontitis].
abstract: OBJECTIVE
  To evaluate the prevalence of putative periodontal microorganism in Chinese patients with aggressive periodontitis (AgP).
  
  
  METHODS
  A total of 72 subgingival plaque samples were collected from 55 AgP patients and 17 healthy subjects. Seven putative periodontal microorganisms including Actinobacillus actinomycetemcomitans (Aa), Porphyromonas gingivalis (Pg), Tannerella forsythensis (Tf), Treponema denticola (Td), Campylobacter rectus (Cr), Prevotella intermedia (Pi) and Prevotella nigrescens (Pn) were detected by using 16S rRNA based polymerase chain reaction (PCR).
  
  
  RESULTS
  The prevalence of Aa in AgP patients was very low (1.8%), while Pg, Tf, Td and Cr were more frequently detected in AgP patients (prevalence: 81.8%, 83.6%, 80% and 81.8%) than in healthy controls (prevalence: 17.6%, 11.8%, 5.9%, 29.4%, P < 0.01).
  
  
  CONCLUSIONS
  The prevalence of Pg, Tf, Td and Cr were very high in aggressive periodontitis patients, and the combination of these bacteria may play an important role in AgP.
authors.affiliation: Department of Periodontology, Peking University School and Hospital of Stomatology, Beijing 100081, China.
authors.forename: Xiang-hui
authors.initials: XH
authors.lastname: Feng
authors.forename: Li
authors.initials: L
authors.lastname: Zhang
authors.forename: Huan-xin
authors.initials: HX
authors.lastname: Meng
authors.forename: Li
authors.initials: L
authors.lastname: Xu
authors.forename: Zhi-bin
authors.initials: ZB
authors.lastname: Chen
authors.forename: Dong
authors.initials: D
authors.lastname: Shi
mesh_terms: D000293:Adolescent; D000328:Adult; D016976:Aggregatibacter actinomycetemcomitans / Q000302:isolation & purification*; D010520:Aggressive Periodontitis / Q000382:microbiology*; D015373:Bacterial Typing Techniques; D044883:Campylobacter rectus / Q000302:isolation & purification; D016022:Case-Control Studies; D003773:Dental Plaque / Q000382:microbiology*; D003774:Dental Plaque Index; D005260:Female; D006801:Humans; D008297:Male; D016133:Polymerase Chain Reaction; D048373:Treponema denticola / Q000302:isolation & purification; D055815:Young Adult