The prevalence of novel periodontal pathogens and bacterial complexes in Stage II generalized periodontitis based on 16S rRNA next generation sequencing

Authors

  • Salem Abu Fanas Ajman University, College of Dentistry, Department of Clinical Sciences, Ajman, United Arab Emirates; Center of Medical and Bio-allied Health Sciences research, Ajman University, Ajman http://orcid.org/0000-0003-3913-7525
  • Carel Brigi Ajman University, College of Dentistry, Department of General Dentistry, Ajman http://orcid.org/0000-0003-1396-1137
  • Sudhir Rama Varma Ajman University, College of Dentistry, Department of Clinical Sciences, Ajman, United Arab Emirates; Center of Medical and Bio-allied Health Sciences research, Ajman University, Ajman
  • Vijay Desai Ajman University, College of Dentistry, Department of Clinical Sciences, Ajman, United Arab Emirates; Center of Medical and Bio-allied Health Sciences research, Ajman University, Ajman http://orcid.org/0000-0001-7364-6097
  • Abiola Senok Mohammed Bin Rashid University of Medicine and Health Sciences, College of Medicine, Department of Microbiology http://orcid.org/0000-0001-6382-198X
  • Jovita D'souza http://orcid.org/0000-0003-4520-4982

DOI:

https://doi.org/10.1590/1678-7757-2020-0787%20%20

Keywords:

Periodontal pathogen, 16S rRNA, Next-Generation sequencing, Microbial profile

Abstract

Objective: To define the subgingival microbial profile associated with Stage II generalized periodontitis using next-generation sequencing and to determine the relative abundance of novel periodontal pathogens and bacterial complexes. Methodology: Subgingival biofilm samples were collected from 80 subjects diagnosed with Stage II generalized periodontitis. Bacterial DNA was extracted, and 16S rRNA-based bacterial profiling via next-generation sequencing was carried out. The bacterial composition and diversity of microbial communities based on the age and sex of the patients were analyzed. The bacterial species were organized into groups: bacterial complexes (red, orange, purple, yellow, and green), novel periodontal pathogens, periodontal health-related species, and unclassified periodontal species. The results were analyzed and statistically evaluated. Results: The highest number of bacteria belonged to the phylum Bacteroidetes and Firmicutes. In terms of relative abundance, the orange complex represented 18.99%, novel bacterial species (Fretibacterium spp. and Saccharibacteria spp.) comprised 17.34%, periodontal health-related species accounted for 16.75% and unclassified periodontal species represented (Leptotrichia spp. and Selenomonas spp.) 15.61%. Novel periodontal pathogens had outweighed the periodontal disease-related red complex (5.3%). The one-sample z-test performed was statistically significant at p<0.05. The Beta diversity based on the unweighted UniFrac distance at the species level demonstrated a total variance of 15.77% based on age and 39.19% on sex, which was not statistically significant. Conclusion: The bacterial species corresponding to the disease-related orange complex and novel periodontal pathogens are predominant in Stage II generalized periodontitis.

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Published

2021-07-06

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Section

Original Articles