吉林大学学报(医学版) ›› 2021, Vol. 47 ›› Issue (1): 210-215.doi: 10.13481/j.1671-587x.20210129

• 调查研究 • 上一篇    下一篇

内蒙古部分地区草原革蜱携带斑点热群立克次体DNA检测及其基因型分布

桂峥1,于晶峰2(),木兰2()   

  1. 1.内蒙古医科大学研究生院,内蒙古 呼和浩特 010110
    2.内蒙古医科大学基础医学院寄生虫学 教研室,内蒙古 呼和浩特 010110
  • 收稿日期:2020-03-19 出版日期:2021-01-28 发布日期:2021-01-27
  • 通讯作者: 于晶峰,木兰 E-mail:1184474898@126.com;wodetenghe@126.com
  • 作者简介:桂 峥(1994-),女,黑龙江省齐齐哈尔人,在读硕士研究生,主要从事蜱媒传染病方面的研究。
  • 基金资助:
    内蒙古自治区卫计委卫生计生科研计划项目(201702052);内蒙古医科大学科技百万项目(YKD2017KJBW002)

Detection of DNA in spotted fever group Rickettsia carried by Dermacentor nuttalli in partial areas of Inner Mongolia and its distribution of genotypes

Zheng GUI1,Jingfeng YU2(),Lan MU2()   

  1. 1.Graduate School of Inner Mongolia Medical University,Hohhot 010110,China
    2.Departmnet of Parasitology,School of Basic medicine,Inner Mongolia Medical University,Hohhot 010110,China
  • Received:2020-03-19 Online:2021-01-28 Published:2021-01-27
  • Contact: Jingfeng YU,Lan MU E-mail:1184474898@126.com;wodetenghe@126.com

摘要: 目的

调查内蒙古部分地区草原革蜱携带斑点热群立克次体(SFGR)的情况,分析该地区蜱携带SFGR的种类并进行同源性分析。

方法

于2019年4月中旬在内蒙古自治区的鄂尔多斯市鄂托克前旗成川镇、呼和浩特市四子王旗牧场和赤峰市阿鲁科尔沁旗天山镇巴彦温都苏木地区,通过普查的方法从708只绵羊中采集了264只草原革蜱,进行单蜱DNA的提取,采用PCR法扩增立克次体16sRNA进行初筛,从每个地区阳性样本中随机选取10个,共30个阳性样本进一步扩增其gltA和ompA基因,并对阳性样品进行序列测定和聚类分析。

结果

在264只蜱虫中,共检出SFGR阳性蜱218只,阳性率为82.57%。成功测序14个SFGR ompA 阳性样本,7个SFGR gltA 阳性样本,序列分析发现gltA 基因和ompA基因的相似度分别为100.00%及99.86%。系统发育分析,所检出的序列与劳氏立克次体在一个分支上,gltA基因序列与乌拉尔立克次体、帕克立克次体和西伯利亚立克次体亲缘关系较近;ompA基因序列与马赛立克次体和扇头蜱立克次体的亲缘关系接近;两者均与蒙纳克立克次体亲缘关系较远。

结论

内蒙古自治区西部、中部和东部3个地区的草原革蜱携带SFGR的基因型均是劳氏立克次体。

关键词: 聚合酶链式反应, 草原革蜱内蒙古株, 劳氏立克次体, 基因型

Abstract:

Objective: To investigate the status of spotted fever group Rickettsia (SFGR) carried by Dermacentor nuttalli in partial areas of in Inner Mongolia, and to analyze the species of tick-carried SFGR in this area and perform the homology analysis.

Methods

In the middle of April 2019, 264 Dermacentor nuttallis from 708 sheep were collected from Chengchuan Town, early Banner of Etoke Banner, Erdos City; Siziwang Banner, Hohhot City and Bayan WenduSumu area, Arukorqin Banner, Chifeng City, Inner Mongolia. After DNA extraction of single tick, Rickettsia 16sRNA was amplified by PCR method as a preliminary screening experiment, ten positive samples were randomly selected from each region, and a total of 30 positive samples were further amplified for gltA and ompA genes, then the positive samples were sequenced and cluster analysis was performed.

Results

Among 264 ticks, 218 were positive SFGR, with the positive rate of 82.57%; 14 SFGR ompA positive samples and 7 SFGR gltA positive samples were sequenced successfully. The similarities of gltA gene and ompA gene were 100% and 99.86%. The results of phylogenetic analysis showed that the detected sequence was in the same branch with Rickettsia raoultii, and the gltA gene sequence was closely related to Candidatus Rickettsia uralicaRickettsia parkeri and Rickettsia sibirica, while the ompA gene sequence was close to that of Rickettsia massiliae and Rickettsia rhipicephali; both of them were far away from Rickettsia monacensis.

Conclusion

The genotype of SFGR carried by Dermacentor nuttalli in Ordos, Siziwang Banner and Chifeng, Inner Mongolia is Rickettsia raoultii.

Key words: polymerase chain reaction, Dermacentor nuttalli, Inner Mongolia Strain, Rickettsia raoultii, genotype

中图分类号: 

  • R376