中国寄生虫学与寄生虫病杂志 ›› 2012, Vol. 30 ›› Issue (2): 8-122-126.

• 论著 • 上一篇    下一篇

应用多重PCR法分析西藏察隅疟疾流行区按蚊吸血习性

 郭绍华1, 周水森1 *, 黄芳1, 郑香1, 武松2, 周华云3, 卓玛央金4   

  1. 1 中国疾病预防控制中心寄生虫病预防控制所,卫生部寄生虫病原与媒介生物学重点实验室,世界卫生组织疟疾、血吸虫病和丝虫病合作中心,上海 200025;  2 安徽中医学院中西医结合临床学院,合肥 230038;3 江苏省寄生虫病防治研究所,无锡 214064; 4 西藏自治区林芝地区疾病预防控制中心,林芝 860100
  • 出版日期:2012-04-30 发布日期:2012-09-28

Investigation on Blood-sucking Habit of Anopheles (Diptera∶Culicidae) Using Multiplex Polymerase Chain Reaction in Malaria-Endemic Area of Chayu County, Tibet

GUO  Chao-Hua1, ZHOU  Shui-Sen1 *, HUANG  Fang1, ZHENG  Xiang1, WU  Song2, ZHOU  Hua-Yun3, ZHUO  Ma-Yang-Jin4   

  1. 1 National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention; Key Laboratory of Parasite and Vector Biology, MOH; WHO Collaborating Centre for Malaria, Schistosomiasis and Filariasis, Shanghai 200025, China;  2 School of Integrated Traditional and Western Medicine, Anhui College of Chinese Traditional Medicine, Hefei 230038, China; 3 Jiangsu Institute of Parasitic Diseases, Wuxi 214064, China; 4 Linzhi Prefecture Center for Disease Control and Prevention, Linzhi 860100, China
  • Online:2012-04-30 Published:2012-09-28

摘要: 目的  用多重PCR法分析西藏疟疾流行区察隅县常见按蚊的吸血习性,为下一步研究传疟媒介提供参考。 方法 2011年7~8月选择察隅县不同生态环境的3个自然村(日玛村、塔玛村和京都村),每个村在人房和畜舍选择8个点,采用诱蚊灯全通宵(20 ∶ 00至次日08 ∶ 00)诱捕法捕捉按蚊,次日清晨收集诱捕的蚊虫,经形态学鉴定蚊种,分析按蚊组成。收集饱血按蚊,分别提取单只蚊胃血的DNA,采用基于不同动物mtDNA?鄄cytb序列差异的多重PCR法鉴定各蚊胃血源,计算人血指数,分析按蚊的吸血习性。 结果  共捕获按蚊1 442只,经形态学鉴定,多斑按蚊种团占99.6%(1 436/1 442),带足按蚊和腹簇按蚊占0.4%(6/1 442)。多斑按蚊种团中,伪威氏按蚊占85.5%(1 228/1 436),威氏按蚊占14.5%(208/1 436)。用多重PCR检测202只多斑按蚊种团(伪威氏按蚊188只和威氏按蚊14只)的饱血蚊胃血,结果显示,伪威氏按蚊兼吸牛/猪血和人血,人血指数为0.35,威氏按蚊吸食猪血和人血,人血指数为0.29。 结论  西藏察隅县2种常见按蚊(伪威氏按蚊和威氏按蚊)均兼吸人畜血,伪威氏按蚊的人血指数较高。

关键词:  , 西藏察隅县;疟疾;按蚊;多重PCR;人血指数

Abstract: Objective   To determine the blood-sucking habit of anopheline by mosquitoes bloodmeal identification in malaria endemic area Chayu County, Tibet Autonomous Region.  Methods  Three villages with different bio-enviroments were selected as the investigation spots. Light traps were set up outdoor and in livestock sheds from sunset (20 ∶ 00) to sunrise (8 ∶ 00) in 3-4 consecutive nights to collect mosquitoes. The trapped anophelines were counted and identified according to morphological criteria and multiple PCR method. A PCR-based methodology according to the mtDNA-cytb variations was used in different mammal hosts to identify bloodmeal sources in engorged mosquitoes. The human blood index (HBI) was assessed to determine the range of hosts.  Results  Among 1 442 anopheline mosquitoes collected by 108 lighttraps on 13 nights. 1 436(99.6%) belonged to Anopheles maculatus complex, with 85.5% An. pseudowillmori and 14.5% An. willmori. Positive bloodmeal identification was found from 168(83%) of 202 field-collected engorged mosquitoes. The crude HBI of An. pseudowillmori and An. willmori were 0.35 and 0.29, respectively.  Conclusion  An. pseudowillmori and An. willmori are both zoophilic and anthropophilic, and An. pseudowillmori shows a higher HBI.

Key words: Tibet, Chayu county, Anopheles, Multi-PCR, Human blood index