Abstract
This study aimed to quantify Porphyromonas gingivalis (Pg) in subgingival plaque of periodontitis (P) and periodontally healthy (H) subjects in the elderly. Subsequently, fimA genotypes were determined, and compared between P and H sites in the same subjects. The proportion of Pg was higher in P than in H. The fimA genotypes of P were identified mainly as II and Ib, while those of H were as I–IV. In four out of five subjects in whom Pg was detected in H sites, the fimA genotype was identical between P and H sites, but the proportion of Pg was significantly higher in P sites than in H sites (P < 0.05). This study suggests that the increase of Pg and the specific fimA genotypes are associated with P in the elderly, and that Pg possibly transmits within the oral cavity.
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References
Abiko Y, Sato T, Mayanagi G, et al (2010) Profiling of subgingival plaque biofilm microflora from periodontally healthy subjects and from subjects with periodontitis using quantitative real-time PCR. J Periodontal Res 45:389–395
Fujiwara T, Morishima S, Takahashi I, et al (1993) Molecular cloning and sequencing of the fimbrilin gene of Porphyromonas gingivalis strains and characterization of recombinant proteins. Biochem Biophys Res Commun 197:241–247
Acknowledgments
This study was supported in part by Tohoku University Graduate School of Dentistry Young Dental Researchers Encouragement Program in 2010–2011 (to YA), and by Grants-in-Aid for Scientific Research (22390399, 23592791) from the JSPS.
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© 2012 Springer
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Abiko, Y., Sato, T., Sakashita, R., Takahashi, N. (2012). Subgingival Plaque Biofilm Microflora of Elderly Subjects. In: Sasaki, K., Suzuki, O., Takahashi, N. (eds) Interface Oral Health Science 2011. Springer, Tokyo. https://doi.org/10.1007/978-4-431-54070-0_46
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DOI: https://doi.org/10.1007/978-4-431-54070-0_46
Publisher Name: Springer, Tokyo
Print ISBN: 978-4-431-54069-4
Online ISBN: 978-4-431-54070-0
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