Related Experiment Video
Updated: Jun 11, 2026

Oral Biofilm Analysis of Palatal Expanders by Fluorescence In-Situ Hybridization and Confocal Laser Scanning Microscopy
Published on: October 20, 2011
A preliminary study of biological characteristics of Streptococcus oligofermentans in oral microecology
1Department of Cariology and Endodontology, Peking University School and Hospital of Stomatology, Haidian District, Beijing, PR China.
Abstract:
This study was designed to explore the biological characteristics of a new oral streptococcus species Streptococcus oligofermentans. Plaque samples were collected from caries-free and caries-active subjects. S. oligofermentans was selectively grown on Mitis salivarius agar plates and identified by using 2-step PCR and was isolated from 38% of 18 subjects. Isolates were found mostly on healthy tooth surfaces. S. oligofermentans had weaker abilities in acid production and demineralizing hydroxyapatite. When Streptococcus mutans was coincubated with S. oligofermentans, total number, acid production and calcium release were significantly inhibited. In conclusion, inhibition of S. mutans could be a beneficial biological characteristic of S. oligofermentans in oral microecology.
Related Concept Videos
The Oral Microbiota
Development of the Oral Microbiota
Sputum Studies I: Gram Stain, cytology, and Acid-fast smear and culture
Gram Stain
The Gram Stain is an integral part of sputum studies. It involves the staining of sputum, which permits...
Microbiota of the Respiratory Tract

