Phylogenetic analyses and detection of viridans streptococci based on sequences and denaturing gradient gel electrophoresis of the rod shape-determining protein gene

Ikuri Konishi, Tomonori Hoshino, Yoshio Kondo, Kan Saito, Miyuki Nishiguchi, Kyoko Sato, Taku Fujiwara

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

Background: Population analysis of viridans streptococci is important because these species are associated with dental caries, bacteremia, and subacute endocarditis, in addition to being important members of the human oral commensal microbiota. Design: In this study, we phylogenetically analyzed the rod shape-determining protein gene (rodA), which is associated with cellular morphology, cell division, and sensitivity for antibiotics, and demonstrated that the diversity of the rodA gene is sufficient to identify viridans streptococci at the species level. Moreover, we developed a more convenient denaturing gradient gel electrophoresis (DGGE) method based on the diversity of the rodA gene (rodA-DGGE) for detecting nine dominant streptococcal species in human saliva, namely, Streptococcus sanguinis, Streptococcus oralis, Streptococcus mitis, Streptococcus parasanguinis, Streptococcus gordonii, Streptococcus vestibularis, Streptococcus salivarius, Streptococcus mutans, and Streptococcus sobrinus. Results: This rodA-DGGE method proved useful in detecting viridans streptococci without cultivation, isolation, and phenotypic characterization. Conclusion: Analysis of the oral microbiota by rodA-DGGE offers a higher resolution than the conventional DGGE using 16S rDNA and may be an alternative in the microbial diagnosis of streptococcal infection.

Original languageEnglish
Article number2015
JournalJournal of Oral Microbiology
Volume1
Issue number2009
DOIs
Publication statusPublished - 2009
Externally publishedYes

Keywords

  • Dental caries
  • Oral microbiota
  • Population analysis
  • Saliva
  • Streptococcus
  • Subacute bacterial endocarditis

ASJC Scopus subject areas

  • Dentistry (miscellaneous)
  • Microbiology (medical)
  • Infectious Diseases

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