PMID: 2503804Jun 1, 1989Paper

Competition between Streptococcus mutans and Lactobacillus casei in mixed continuous culture

Oral Microbiology and Immunology
G H Bowden, I R Hamilton

Abstract

In natural oral ecosystems, succession of Streptococcus mutans and Lactobacillus species occurs in bacterial communities which can be associated with the development of carious lesions. The objective of this study was to explore the interaction between 2 strains of S. mutans (SF2452) and Lactobacillus casei (RB1014) when grown together in continuous culture under conditions of varying environmental pH and in the presence of fluoride. When the strains, isolated from approximal carious lesions, were grown initially at a dilution rate of 0.1 h-1 under a glucose limitation at pH 7.0, a stable mixed community developed (Days 5-10) with S. mutans as the dominant population. When the pH control was removed (Day 10), the binary culture lowered the pH to 5.1 causing a small reduction in the numbers of S. mutans and allowing L. casei to predominate. A more dramatic effect was seen when the environmental pH was rapidly lowered to 4.8 by the addition of acid. In this case, the S. mutans population was significantly reduced and the L. casei population rose to the level previously held by S. mutans. Re-adjustment of the pH to 7.0 resulted in a re-establishment of the population ratios prior to the addition of acid. The possibility that S. mu...Continue Reading

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Citations

Jun 6, 2003·Applied and Environmental Microbiology·Hans-Peter GrossartHelle Ploug
Dec 17, 2014·European Journal of Dentistry·Liliana Guimarães Oliveira RicattoFlávia Lucisano Botelho Amaral
Jul 5, 2008·Microbiology·Luis E Chávez de PazGunnel Svensäter
Dec 17, 2011·FEMS Immunology and Medical Microbiology·Tejal Madhwani, Andrew J McBain
Mar 6, 1998·Critical Reviews in Oral Biology and Medicine : an Official Publication of the American Association of Oral Biologists·G H Bowden, I R Hamilton
Apr 1, 1997·Advances in Dental Research·P D Marsh, D J Bradshaw
Apr 1, 1997·Advances in Dental Research·J Carlsson
Apr 1, 1997·Advances in Dental Research·G H Bowden, Y H Li
Mar 1, 2018·Journal of Applied Oral Science : Revista FOB·Beatriz Martines de SouzaAna Carolina Magalhães
Nov 10, 1998·Oral Microbiology and Immunology·I R Hamilton, G Svensäter
Apr 1, 1991·Oral Microbiology and Immunology·I R Hamilton, N D Buckley
Apr 18, 2007·Journal of Materials Science. Materials in Medicine·C A ParkY H Kwon
Mar 25, 2015·Journal of Complementary & Integrative Medicine·Titipong PrueksrisakulPasutha Thunyakitpisal
Sep 16, 2005·The Journal of Clinical Pediatric Dentistry·Luis Alejandro Aguilera GalavizRafael Aguilar Rodriguez
Jul 16, 2017·BMC Oral Health·Remberto Marcelo Argandoña ValdezAlberto Carlos Botazzo Delbem
Feb 1, 1990·Journal of Dental Research·G H Bowden
Apr 1, 1991·Applied and Environmental Microbiology·W A Belli, R E Marquis

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