Genotypic and phenotypic analysis of Streptococcus mutans from different oral cavity sites of caries-free and cariesactive children

摘要

Streptococcus mutans exhibits extensive genotypic diversity, but the role of this variation is poorly understood. This study aimed to determine the number and distribution of genotypes of S. mutans isolated from caries-active and caries-free children and to evaluate some of their phenotypic traits. Methods: Stimulated saliva, tongue surface and biofilms over sound and carious teeth surfaces were sampled from 10 caries-free and 11 caries-active children aged 5-8 years.