Effects of Fluoride and pH on Proton translocating Membrane ATPase Activity of Fluoride resistant Streptococcus mutans in vitro;

Methods: Fluoride-resistant strains of Streptococcus sobrinus 6715 was induced by increasing the concentration of fluoride in the TSA step by step.

Objective In order to demonstrate the idiotypic variation between fluoride-resistant strains and their pa- rent strains, ATPase gene sequence analysis was carried out.

The effect of chlorhexidine on the growth of S.mutans, S.sobrinus and their fluoride-resistant strains;

The genomic differences between the fluoride-resistant strains of streptococcus mutans and streptococcus sobrinus and their parental strains by REA;

RESULTS: The fluoride-resistant strains demineralized enamel less than did their parent, wild-type strains when on fluoride existed; whereas the result was opposite in the presence of 0.

Objective:To detect the mutation of the acid-resistant genedltcin the fluoride-resistant strain of Streptococcus mutans and to suppose the significance of the gene mutation.

PURPOSE:To detect the acid-resistant gene fhs in the fluoride-resistant strain of Streptococcus mutans and clone it.

Maternal salivary levels of mutans streptococci and oral infection of young children.;

Inhibitory effects of specific egg yolk immunoglobulin Y on in vitro adhesion of mutans streptococci;

Relationship between Mutans streptococci transmission from mothers to children and initial adherence properties;