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作 者:姜云涛[1] 梁景平[1] 李超伦[1] 叶冬霞[1]
机构地区:[1]上海市第二医科大学附属第九人民医院口腔内科,上海200011
出 处:《口腔医学研究》2006年第1期1-4,共4页Journal of Oral Science Research
基 金:"十五"国家科技攻关计划课题资助项目(编号:2004BA720A24)
摘 要:目的:建立快速定量检测菌斑中主要致龋菌变形链球菌的方法,为龋齿活跃性评估提供参考数据。方法:收集无龋(caries free,CF)和高龋(caries susceptible,CS)儿童牙菌斑各15例,将不同荧光素标记的寡核苷酸探针:细菌通用探针和变形链球菌特异性探针进行荧光原位杂交,结合流式细胞仪检测菌斑中变形链球菌所占的比例。结果:在无龋儿童菌斑中,变形链球菌在总菌中所占比例数是1.24%~3.4%(2.25±0.71),而在高龋儿童菌斑中比例为5.04%-9.7%(7.37±1.34),两组比较有着明显的统计学差异(P〈0.01)。结论:流式细胞仪结合荧光原位杂交技术,可作为一种细菌定量检测方法应用于致龋性变形链球菌的定量分析中。Objective: To develop a fast and reliable method for the rapid identification and quantification of the major cariogenie bacteria Streptococcus mutans in dental plaque, and provide reference data for accurate evaluation of caries susceptibility or caries activity. Methods: Dental plaque sample were collected from 30 children subject, 15 in caries free group (CF, dmft =0), 15 in caries susceptible group( CS, dmft≥10). Ribosomal RNA- targeted specificity probes labeled with different fluorescence for universal bacteria and Streptococcus mutans were analysed by fluorescence in situ hybridization (FISH) and flow cytometry (FCM). Results: The percentage of S. mutans in plaque ranged fron~ 1.24 to 3.4 in CF groupe (2.25≥0.71 ) and from 5.04 to 9.7 in CS groupe(7.37≥1.34). The statistical analysis of the results indicated significant difference (P 〈0. 01 ). Conclusion: Fluorescence in situ hybridization, combined with flow cytometry detection, can be used to quantitative analyse of cariogenic S. mutans.
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