检验医学 ›› 2012, Vol. 27 ›› Issue (11): 913-916.

• 微生物学检验论著 • 上一篇    下一篇

食源性沙门菌感染的实验室诊断及鼠伤寒沙门菌同源性分析

孙康德1,李洁琼1,陈福祥2,陈军3,王宇3   

  1. 1. 上海交通大学医学院附属第九人民医院检验科,上海 200011;2. 上海黄浦区疾病控制中心微生物科,上海 200011
  • 收稿日期:2012-09-07 修回日期:2012-10-09 出版日期:2012-11-30 发布日期:2012-11-14
  • 作者简介:孙康德,男,1966年生,硕士,副主任技师,主要从事微生物检测和细菌耐药性研究。

Laboratory diagnosis in food-borne diseases caused by Salmonella and homology analysis in Salmonella typhimurium

  1. 1. Department of Clinical Laboratory,Shanghai Ninth People′s Hospital,Shanghai Jiaotong University School of Medicine,Shanghai 200011,China; 2. Department of Clinical Microbiology,Shanghai Huangpu District Center for Disease Control and Prevention,Shanghai 200011,China
  • Received:2012-09-07 Revised:2012-10-09 Online:2012-11-30 Published:2012-11-14

摘要: 目的 用改良的沙门菌分离鉴定方法提高肠道沙门菌的检出率,初步掌握上海市主要沙门菌流行状况及菌型分布,建立沙门菌脉冲场凝胶电泳(PFGE)分型数据库,以便在发生沙门菌病时快速溯源,为控制该病的传播提供技术支撑。方法 用改良的沙门菌鉴定方法对可疑肠道粪便标本进行分离、培养和鉴定;用PFGE对鼠伤寒沙门菌进行DNA分子分型,分析试验菌株的同源性。结果 用改良的沙门菌鉴定方法分离出的沙门菌中以肠炎沙门菌为主,占全部菌株的42.1%,其次为鼠伤寒沙门菌,占13.2%。PFGE分析的10株鼠伤寒沙门菌分成A、B 2个PFGE型,其中A型菌株6株,B型菌株4株。A型菌株有4个亚型。结论 改良的沙门菌鉴定方法可以有效提高沙门菌的检出率;PFGE是一种研究鼠伤寒沙门菌分子分型的有效方法,鼠伤寒沙门菌的分型结果显示了相对集中的亲缘关系。

关键词: 沙门菌, 改良分离鉴定方法, 脉冲场凝胶电泳, 分子分型

Abstract:  Objective To increase the detection rate of Salmonella in intestinal tract by the improved isolation and identification method,and to fundamentally understand the major Salmonella and its molecular typing in Shanghai,establish the database of pulsed-field gel electrophoresis(PFGE)typing for rapid source-tracing and control dissemination of the disease during Salmonella outbreaks. Methods The improved isolation and identification method was used to detect suspected Salmonella in fecal specimens. PFGE was used to perform molecular typing of Salmonella typhimurium. Results Salmonella enteritidis was main among the isolates of Salmonella by the improved isolation and identification method,accounting for 42.1%.The second was Salmonella typhimurium,accounting for 13.2%.Two distinct DNA fragment profiles,PFGE type A and B,were observed,including type A: 6 isolates and type B: 4 isolates respectively.Type A could be subclassified further into 4 subtypes. Conclusions The improved isolation and identification method could effectively increase the detection rate of Salmonella in fecal specimens.PFGE is an effective method to study the molecular typing.The research shows relatively close kinship in molecular typing of Salmonella typhimurium.

Key words: Salmonella, Improved isolation and identification method, Pulsed-field gel electrophoresis, Molecular typing