1·Streptococcus mutans; Fluorescent quantitation PCR; Saliva;
变形链球菌； 荧光定量PCR； 唾液；
2·Streptococcus mutans is the primary etiological agent of human dental caries.
变形链球菌是引发龋病的主要病原因素。
3·Oral Streptococcus mutans is an etiologic agent of dental caries and Streptococcus sangius is in favor of periodontal tissues.
口腔变形链球菌是龋病的主要致病菌，血链球菌为牙周有益菌。
4·PURPOSE: To synthesis and identify the competence stimulated peptide (CSP) of streptococcus mutans quorum sensing signaling system.
目的：人工合成变形链球菌密度感也CSP信号肽及鉴定。
5·Objectives:To evaluate the effect of different carbohydrates in the broth on the acidogenicity of the Streptococcus mutans isolates.
目的：观察不同糖源对变形链球菌（变链）生长产酸的影响。
6·Objective To compare the growth inhibiting effect of two different concentrations fluoride protectors to Streptococcus mutans and Streptococcus sobrinus.
目的比较两种浓度氟保护漆对致龋链球菌生长抑制作用。
7·Objective: To sequence V-region and P-region gene of surface protein of serotype c Streptococcus mutans clinical isolates with different adherent abilities.
目的：对不同粘附力变形链球菌临床分离株表面蛋白V区、P区编码基因进行序列测定。
8·OBJECTIVE: To investigate the ability of biofilm formation and aciduricity of Streptococcus mutans isolated from people with different caries susceptibility.
目的：探讨不同龋敏感者变形链球菌临床分离株的生物膜形成能力和产酸能力。
9·Mutans streptococci (MS) are the primary cariogenic agents, and Streptococcus mutans and Streptococcus sobrinus are believed to have the closest relationship with human caries.
变形链球菌族（MS）是目前公认的致龋菌，其中与人类龋病发生关系密切的是变形链球菌和茸毛链球菌。
10·Objective To evaluate the effect of chlorhexidine varnish on Streptococcus mutans and total bacterial count in dental plaque of orthodontic children, and the changes of salivary pH.
目的观察和探讨 洗必泰涂料对正畸儿童牙面菌斑中细菌总数和变形链球菌数的影响，以及唾液pH值的 改变。