ArticleApplied and environmental microbiology2003
Effect of the environment on genotypic diversity of Actinomyces naeslundii and Streptococcus oralis in the oral biofilm.
Article in Applied and environmental microbiology, 2003. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 10 papers.
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Who cites it
10 citing papers in PubMed.
- Short chain fatty acids induced the type 1 and type 2 fimbrillin-dependent and fimbrillin-independent initial attachment and colonization of Actinomyces oris monoculture but not coculture with streptococci.BMC microbiology · 2020Article
- Comparative Evaluation of the Efficacy of Stepwise Caries Excavation vs Indirect Pulp Capping in Preserving the Vitality of Deep Carious Lesions in Permanent Teeth of Pediatric Patients: AnInternational journal of clinical pediatric dentistry · 2020Article
- Role of SCFAs for Fimbrillin-Dependent Biofilm Formation ofMicroorganisms · 2018Article
- Genotypic characterization and comparison of Streptococcus mutans in American Indian and Southeast Iowa children.Clinical and experimental dental research · 2017Article
- Simultaneous detection of Streptococcus pneumoniae, S. mitis, and S. oralis by a novel multiplex PCR assay targeting the gyrB gene.Journal of clinical microbiology · 2013Article
- Population structure of Streptococcus oralis.Microbiology (Reading, England) · 2009Article
- Effect of biofilm growth on expression of surface proteins of Actinomyces naeslundii genospecies 2.Applied and environmental microbiology · 2006Article
- Reproducibility of a new caries risk test under different oral conditions.Clinical oral investigations · 2005Article
- Phenotypic and genotypic selection of microbiota surviving under dental restorations.Applied and environmental microbiology · 2005Article
- Carious dentine provides a habitat for a complex array of novel Prevotella-like bacteria.Journal of clinical microbiology · 2004Article
Corrections and comments
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Authors and funding
8 authors.
Funding
Abstract
The genotypic diversity of Actinomyces naeslundii genospecies 2 (424 isolates) and Streptococcus oralis (446 isolates) strains isolated from two sound approximal sites in all subjects who were either caries active (seven subjects) or caries free (seven subjects) was investigated by using the repetitive extragenic palindromic PCR. The plaque from the caries-active subjects harbored significantly greater proportions of mutans streptococci and lactobacilli and a smaller proportion of A. naeslundii organisms than the plaque sampled from the caries-free subjects. These data confirmed that the sites of the two groups of subjects were subjected to different environmental stresses, probably determined by the prevailing or fluctuating acidic pH values. We tested the hypothesis that the microfloras of the sites subjected to greater stresses (the plaque samples from the caries-active subjects) would exhibit reduced genotypic diversity since the sites would be less favorable. We found that the diversity of A. naeslundii strains did not change (chi2 = 0.68; P = 0.41) although the proportional representation of A. naeslundii was significantly reduced (P < 0.05). Conversely, the diversity of the S. oralis strains increased (chi2 = 11.71; P = 0.0006) and the proportional representation of S. oralis did not change. We propose that under these environmental conditions the diversity and number of niches within the oral biofilm that could be exploited by S. oralis increased, resulting in the increased genotypic diversity of this species. Apparently, A. naeslundii was not able to exploit the new niches since the prevailing conditions within the niches may have been deleterious and not supportive of its proliferation. These results suggest that environmental stress may modify a biofilm such that the diversity of the niches is increased and that these niches may be successfully exploited by some, but not necessarily all, members of the microbial community.
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