Chines Journal of Vector Biology and Control ›› 2019, Vol. 30 ›› Issue (3): 255-258.DOI: 10.11853/j.issn.1003.8280.2019.03.006

• Scrub Typhus Special Report • Previous Articles     Next Articles

An investigation of natural focus of scrub typhus in Yongcheng, Henan province, China

LI Gui-chang1, LI Yong-xiang1,2, CHEN Chuan-wei3, LIU Ji-qi4, LUO Yun-dong3, ZHOU Tuan-jie3, SHEN Yang3, JIANG Zhi-li3, GUO Yu-hong1, SONG Xiu-ping1, WANG Jun1, WANG Yu-jiao1,5, ZHAO Ning1, LI Dong-mei1, LIU Jing-li1, LU Liang1, LIU Qi-yong1   

  1. 1 State Key Laboratory of Infectious Diseases Prevention and Control, National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing 102206, China;
    2 School of Public Health, Shandong First Medical University;
    3 Yongcheng Center for Disease Control and Prevention;
    4 Henan Center for Disease Control and Prevention;
    5 School of Public Health, Jiamusi University
  • Received:2019-03-30 Online:2019-06-20 Published:2019-06-20
  • Supported by:
    Supported by the National Science and Technology Major Project of China (No. 2017ZX10303404006007, 2017ZX10303404006008, 2017ZX10303404005003) and National Key Research and Development Plan (No. 2016YFC1202000, 2016YFC1202005)

河南省永城市恙虫病自然疫源地调查研究

李贵昌1, 李永香1,2, 陈传伟3, 刘吉起4, 罗运动3, 周团结3, 沈阳3, 蒋之礼3, 郭玉红1, 宋秀平1, 王君1, 王玉姣1,5, 赵宁1, 栗冬梅1, 刘京利1, 鲁亮1, 刘起勇1   

  1. 1 中国疾病预防控制中心传染病预防控制所媒介生物控制室, 传染病预防控制国家重点实验室, 北京 102206;
    2 山东第一医科大学公共卫生学院, 山东 泰安 271016;
    3 永城市疾病预防控制中心, 河南 永城 476610;
    4 河南省疾病预防控制中心, 河南 郑州 450016;
    5 佳木斯大学公共卫生学院, 黑龙江 佳木斯 154007
  • 通讯作者: 郭玉红,Email:guoyuhong@icdc.cn;刘起勇,Email:liuqiyong@icdc.cn
  • 作者简介:李贵昌,男,副研究员,从事鼠和鼠体寄生螨及相关传染病研究,Email:liguichang@icdc.cn
  • 基金资助:
    国家科技重大专项(2017ZX10303404006007,2017ZX10303404006008,2017ZX10303404005003);国家重点研发计划(2016YFC1202000, 2016YFC1202005)

Abstract: Objective To investigate the species compositions of rodents and the chigger mites on their body surface and the infection rate of Orientia tsutsugamushi in rodents in Yongcheng, Henan province, China, and to provide a scientific basis for the prevention and control of scrub typhus in Yongcheng. Methods Rat traps were used to capture rodents and to collect ectoparasites from the body surface of rodents in different survey sites and different habitats in Yongcheng in October 2017. Nested PCR was used to detect nucleic acid of O. tsutsugamushi. The rodent density, chigger infestation rate, chigger index, and pathogen infection rate were calculated. Results A total of 110 rodents were captured with a capture rate of 12.21%. Apodemus agrarius accounted for 90.00%. A total of 1 249 chigger mites were collected from rodents. The chigger infestation rate and chigger index were relatively high in the forest along the riverbank, wetland, and mountain forest. Leptotrombidium scutellare (96.86%) was the dominant chigger mite species, which was mainly parasitic on the body surface of A. agrarius. The O. tsutsugamushi positive rate of rodent was 10.48%. Apodemus agrarius, Rattus norvegicus, and Mus musculus were detected O. tsutsugamushi positive with nPCR. Orientia tsutsugamushi in Yongcheng belonged to Kawasaki molecular type. Conclusion This study confirms that there are some epidemic foci of scrub typhus with host rodents in Yongcheng, which have the same hosts and vectors as the surrounding epidemic foci of scrub typhus.

Key words: Scrub typhus, Nature focus, Rodent, Chigger mite, Orientia tsutsugamushi

摘要: 目的 通过调查河南省永城市农村鼠类及其体表寄生恙螨构成和鼠类恙虫病东方体感染率,为该地传染病防控提供科学依据。方法 于2017年10月选择永城市不同地点、生境,用鼠夹法捕获鼠类并收集其体表寄生虫,使用巢式PCR检测恙虫病东方体核酸。计算鼠密度及其体表携带恙螨率、恙螨指数和病原体感染率。结果 共捕获鼠类110只,捕获率为12.21%,黑线姬鼠占90.00%。从鼠类体表检获恙螨1 249只,河岸林带、湿地和山区林地等生境鼠类带恙螨率和恙螨指数均较高。小板纤恙螨占96.86%,是当地优势螨种,主要寄生在黑线姬鼠体表。鼠类病原学检测阳性率为10.48%,黑线姬鼠、褐家鼠和小家鼠均有阳性。该地恙虫病东方体属于Kawasaki分子型。结论调查证实永城市存在鼠间恙虫病疫源地,与周边地区恙虫病疫源地具有相同的宿主和媒介。

关键词: 恙虫病, 自然疫源地, 鼠类, 恙螨, 恙虫病东方体

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