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Acidogenicity and acid tolerance of Streptococcus oralis and Streptococcus mitis isolated from plaque of healthy and incipient caries teeth

BACKGROUND: Non-mutans low pH oral streptococci are postulated to contribute to caries etiology. OBJECTIVE: This study was undertaken to investigate whether the acidogenicity and acid tolerance of clinical strains of Streptococcus oralis and Streptococcus mitis correlate with health or early-stage e...

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Autores principales: Banas, Jeffrey A., Zhu, Min, Dawson, Deborah V., Blanchette, Derek R., Drake, David R., Gu, Hongjie, Frost, Ryan, McCaulley, Grant, Levy, Steven M.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Co-Action Publishing 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5084378/
https://www.ncbi.nlm.nih.gov/pubmed/27790973
http://dx.doi.org/10.3402/jom.v8.32940
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author Banas, Jeffrey A.
Zhu, Min
Dawson, Deborah V.
Blanchette, Derek R.
Drake, David R.
Gu, Hongjie
Frost, Ryan
McCaulley, Grant
Levy, Steven M.
author_facet Banas, Jeffrey A.
Zhu, Min
Dawson, Deborah V.
Blanchette, Derek R.
Drake, David R.
Gu, Hongjie
Frost, Ryan
McCaulley, Grant
Levy, Steven M.
author_sort Banas, Jeffrey A.
collection PubMed
description BACKGROUND: Non-mutans low pH oral streptococci are postulated to contribute to caries etiology. OBJECTIVE: This study was undertaken to investigate whether the acidogenicity and acid tolerance of clinical strains of Streptococcus oralis and Streptococcus mitis correlate with health or early-stage enamel caries. DESIGN: S. oralis and S. mitis were isolated from plaque samples taken from the occlusal surfaces of second molars sampled at two different visits 4 years apart. All sites were sound at Visit 1; subjects were segregated into one of three groups based on the status of the site at Visit 2 and caries elsewhere in the dentition. Strains of S. oralis and S. mitis were evaluated for acidogenicity and acid tolerance, and the results correlated with the clinical status of the sites from which they were isolated. Mutans streptococci (MS) isolated from the plaque samples were also quantified, and the presence or absence of growth on pH 5.5 media or on media selective for bifidobacteria was recorded. RESULTS: No significant positive correlations were found between the acidogenicity properties of the S. oralis and S. mitis clones and caries at either visit. Similar results were obtained for acid tolerance of S. oralis clones but were inconclusive for S. mitis clones. A statistically significant positive correlation between MS levels and caries (or future caries) was evident at both visits, but there were no statistical correlations with the growth on pH 5.5 media or media selective for bifidobacteria. CONCLUSIONS: The low pH potential likely varies considerably among oral streptococcal species and is least likely to be found among strains of S. mitis. Accordingly, the concept and constitution of ‘low pH streptococci’ may need to be re-evaluated.
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spelling pubmed-50843782016-11-14 Acidogenicity and acid tolerance of Streptococcus oralis and Streptococcus mitis isolated from plaque of healthy and incipient caries teeth Banas, Jeffrey A. Zhu, Min Dawson, Deborah V. Blanchette, Derek R. Drake, David R. Gu, Hongjie Frost, Ryan McCaulley, Grant Levy, Steven M. J Oral Microbiol Original Article BACKGROUND: Non-mutans low pH oral streptococci are postulated to contribute to caries etiology. OBJECTIVE: This study was undertaken to investigate whether the acidogenicity and acid tolerance of clinical strains of Streptococcus oralis and Streptococcus mitis correlate with health or early-stage enamel caries. DESIGN: S. oralis and S. mitis were isolated from plaque samples taken from the occlusal surfaces of second molars sampled at two different visits 4 years apart. All sites were sound at Visit 1; subjects were segregated into one of three groups based on the status of the site at Visit 2 and caries elsewhere in the dentition. Strains of S. oralis and S. mitis were evaluated for acidogenicity and acid tolerance, and the results correlated with the clinical status of the sites from which they were isolated. Mutans streptococci (MS) isolated from the plaque samples were also quantified, and the presence or absence of growth on pH 5.5 media or on media selective for bifidobacteria was recorded. RESULTS: No significant positive correlations were found between the acidogenicity properties of the S. oralis and S. mitis clones and caries at either visit. Similar results were obtained for acid tolerance of S. oralis clones but were inconclusive for S. mitis clones. A statistically significant positive correlation between MS levels and caries (or future caries) was evident at both visits, but there were no statistical correlations with the growth on pH 5.5 media or media selective for bifidobacteria. CONCLUSIONS: The low pH potential likely varies considerably among oral streptococcal species and is least likely to be found among strains of S. mitis. Accordingly, the concept and constitution of ‘low pH streptococci’ may need to be re-evaluated. Co-Action Publishing 2016-10-26 /pmc/articles/PMC5084378/ /pubmed/27790973 http://dx.doi.org/10.3402/jom.v8.32940 Text en © 2016 Jeffrey A. Banas et al. http://creativecommons.org/licenses/by-nc/4.0/ This is an Open Access article distributed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License, permitting all non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Original Article
Banas, Jeffrey A.
Zhu, Min
Dawson, Deborah V.
Blanchette, Derek R.
Drake, David R.
Gu, Hongjie
Frost, Ryan
McCaulley, Grant
Levy, Steven M.
Acidogenicity and acid tolerance of Streptococcus oralis and Streptococcus mitis isolated from plaque of healthy and incipient caries teeth
title Acidogenicity and acid tolerance of Streptococcus oralis and Streptococcus mitis isolated from plaque of healthy and incipient caries teeth
title_full Acidogenicity and acid tolerance of Streptococcus oralis and Streptococcus mitis isolated from plaque of healthy and incipient caries teeth
title_fullStr Acidogenicity and acid tolerance of Streptococcus oralis and Streptococcus mitis isolated from plaque of healthy and incipient caries teeth
title_full_unstemmed Acidogenicity and acid tolerance of Streptococcus oralis and Streptococcus mitis isolated from plaque of healthy and incipient caries teeth
title_short Acidogenicity and acid tolerance of Streptococcus oralis and Streptococcus mitis isolated from plaque of healthy and incipient caries teeth
title_sort acidogenicity and acid tolerance of streptococcus oralis and streptococcus mitis isolated from plaque of healthy and incipient caries teeth
topic Original Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5084378/
https://www.ncbi.nlm.nih.gov/pubmed/27790973
http://dx.doi.org/10.3402/jom.v8.32940
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