摘要
目的采用脉冲场凝胶电泳（PFGE）技术，对江西省钩端螺旋体（钩体）患者及动物宿主中分离的钩体菌株型别进行分子流行病学调查。方法利用核酸内切酶NotI对提取的钩体菌株染色体DNA进行酶切，通过PFGE将DNA片段分离。获得的PFGE图像采用分析软件BioNumerics4．0进行处理并建立数字化数据库，以相似度〉75％为标准，将获各钩体PFGE图谱与中国15群15型钩体参考标准株进行比较并进行聚类分析。结果江西省不同地区的139株钩体可分为46个PFGE型，优势型为LepNotI．0071、LepNotI．0072和LepNotI．0043型，分别占所有钩体菌株的28．06％、15．11％和7．19％。139株钩体分离株中，84．89％（118／139）菌株的PFGE图谱与6群6型中国钩体参考标准株基本相符，其中32．37％（45／139）钩体菌株属于黄疸出血群赖型，15．83％（22／139）和15．11％（21／139）钩体菌株分别属于澳洲群澳洲型和爪哇群爪哇型。结论PFGE是一种快速、准确、高效的钩体分型方法。黄疸出血群赖型是江西省人群及动物中优势血清型，澳洲群澳洲型和爪哇群爪哇型位于其次。
Objective To perform a molecular epidemiological investigation on the types of Leptospira interrogans isolates from leptospirosis patients and animal hosts in Jiangxi province, using a pulsed-field gel electrophoresis （PFGE）. Methods The extracted chromosomal DNA from leptospiral isolates were digested with restriction endonuclease Not I and the DNA segments were separated by using PFGE. By BiOnurerics V4.0 software and 75% similarity as the standard, the obtained PFGE images from leptospiral isolates were managed to establish a digitization database and then the PFGE maps of leptospiral isolates were compared with those of reference standard strains belonging to 15 serovars in 15 serogroups of L interrogans, for cluster analysis. Results 139 strains of L. interrogans isolated from different areas of Jiangxi province were classified into 46 PFGE types. Among the PFGE types, LepNot I.0071, LepNot I.0072 and LepNot I .0043 were the predominant types that accounting for 28.06%, 15.11% and 7.19% of all the leptospiral isolates, respectively. The PFGE maps from 84.89% （118/139） of the 139 leptospiral isolates were found to basically match those of 6 reference standard strains belonging to 6 serovar in 6 serogroups of L. interrogans. In the 118 matched leptospiral isolates, 32.37% （45 strains）, 15.83% （22 strains） and 15.11% （21 strains） belonged to sero-groups Icterohaemorrhagiae serovar Lai, sero-groups Australis serovar Australis and sero-group Javanica serovar Javanica, respectively. Conclusion PFGE seemed a fast, accurate and effective method for typing of L. interrogans isolates. Serogroup Ieterohaemorrhagiae serovar Lai and followed by serogroup Australis serovar Australis as well as serogroup Javanica serovar Javanica were the predominant L.interrogans species in humans and animal hosts in Jiangxi province.
出处
《中华流行病学杂志》
CAS
CSCD
北大核心
2010年第4期434-437,共4页
Chinese Journal of Epidemiology
关键词
钩端螺旋体
脉冲场凝胶电泳
分型
分子流行病学
Leptospira interrogans
Pulsed-field gel electrophoresis
Typing
Molecular epidemiology
