title: Does obesity influence the subgingival microbiota composition in periodontal health and disease?
abstract: To evaluate whether obesity affects the subgingival microbial composition of patients with periodontal health or chronic periodontitis (CP).
  
  
  
  Based on periodontal parameters, body mass index and waist-hip ratio, 166 patients were allocated into one of the following groups: Normal weight (NW) patients with periodontal health (n = 44), NW patients with CP (n = 40), obese patients with periodontal health (n = 40) and obese patients with CP (n = 42). Six subgingival biofilm samples per patient were analysed for their content of 40 bacterial species using checkerboard DNA-DNA hybridization.
  
  
  
  Obese patients with CP harboured higher levels and/or higher proportions of several periodontal pathogens than those with NW and CP, including Aggregatibacter actinomycetemcomitans, Eubacterium nodatum, Fusobacterium nucleatum ss vincentii, Parvimonas micra, Prevotella intermedia, Tannerella forsythia, Prevotella melaninogenica and Treponema socranskii. The proportions of most of these pathogens, as well Campylobacter rectus and Eikenella corrodens, were more increased in the diseased sites of the obese patients than in those with NW. Furthermore, the healthy sites of the obese patients, presenting or not CP, also exhibited higher proportions of some of the pathogens than patients with NW.
  
  
  
  Obesity is associated with increased levels and proportions of periodontal pathogens, especially in patients with CP.
authors.affiliation: Department of Periodontology, Guarulhos University, São Paulo, Brazil.
authors.forename: Suellen Silva
authors.initials: SS
authors.lastname: Maciel
authors.affiliation: Department of Periodontology, Guarulhos University, São Paulo, Brazil.
authors.forename: Magda
authors.initials: M
authors.lastname: Feres
authors.affiliation: Department of Periodontology, Guarulhos University, São Paulo, Brazil.
authors.forename: Tiago Eduardo Dias
authors.initials: TE
authors.lastname: Gonçalves
authors.affiliation: Department of Periodontology, Guarulhos University, São Paulo, Brazil.|Department of Dentistry, Federal University of Santa Catarina, Florianópolis, Santa Catarina, Brazil.
authors.forename: Glaucia Santos
authors.initials: GS
authors.lastname: Zimmermann
authors.affiliation: Biostatistics Unit, Public Health Department, University of Barcelona, Barcelona, Spain.
authors.forename: Hélio Doyle Pereira
authors.initials: HD
authors.lastname: da Silva
authors.affiliation: Department of Periodontology, Guarulhos University, São Paulo, Brazil.
authors.forename: Luciene Cristina
authors.initials: LC
authors.lastname: Figueiredo
authors.affiliation: Department of Periodontology, Guarulhos University, São Paulo, Brazil.
authors.forename: Poliana Mendes
authors.initials: PM
authors.lastname: Duarte
mesh_terms: D016976:Aggregatibacter actinomycetemcomitans; D001439:Bacteroides; D003773:Dental Plaque; D016967:Fusobacterium nucleatum; D006801:Humans; D064307:Microbiota; D009765:Obesity; D016966:Porphyromonas gingivalis; D018713:Prevotella intermedia
keywords: DNA probes; chronic periodontitis; microbiology; obesity