《中国畜牧兽医》 ›› 2017, Vol. 44 ›› Issue (2): 336-343.doi: 10.16431/j.cnki.1671-7236.2017.02.005

• 生物技术 • 上一篇    下一篇

珠江上游地区蚊虫乙型脑炎病毒核酸检测及PrME基因序列分析

吕顺燕1,2, 王静林1, 李楠1, 胡骑1, 何于雯1, 赵德宏1, 陈红宇1, 李华春1   

  1. 1. 云南省畜牧兽医科学院云南省热带亚热带动物病毒重点实验室, 昆明 650224;
    2. 云南省昆明市东川区动物疫病预防控制中心, 昆明 654100
  • 收稿日期:2016-06-25 出版日期:2017-02-20 发布日期:2017-02-25
  • 通讯作者: 王静林, 李华春 E-mail:Wangjl107@163.com;li_huachun@hotmail.com
  • 作者简介:吕顺燕(1979-), 女, 云南东川人, 本科, 兽医师, 研究方向:动物疫病预防控制, E-mail:759445528@qq.com
  • 基金资助:

    国家自然科学基金(31460669);国家公益性(农业)行业专项(201303035)

Nucleotide Detection of Mosquito Japanese Encephalitis Virus and Sequence Analysis of PrM and E Genes in Upper Pearl River Region

LV Shun-yan1,2, WANG Jing-lin1, LI Nan1, HU Qi1, HE Yu-wen1, ZHAO De-hong1, CHEN Hong-yu1, LI Hua-chun1   

  1. 1. Yunnan Tropical and Subtropical Animal Viral Disease Laboratory, Yunnan Animal Science and Veterinary Institute, Kunming 650224, China;
    2. Dongchuan Center for Animal Disease Control and Prevention, Kunming 654100, China
  • Received:2016-06-25 Online:2017-02-20 Published:2017-02-25

摘要:

试验旨在了解珠江上游地区乙型脑炎病毒(JEV)主要传播媒介蚊虫的种类、分布及携带JEV基因型和分子特征。2013年7月在珠江上游地区师宗县采集蚊虫和库蠓标本,并对蚊虫进行分类鉴定;同时采用黄病毒属引物对采集到的蚊虫和库蠓标本进行检测,阳性标本用JEV PrME基因特异引物进行扩增、测序,然后采用生物信息学软件进行序列分析。在4个采集点共采集蚊虫3 705只,分别属于库蚊、按蚊、伊蚊和阿蚊4个属的7种蚊虫,牛圈以中华按蚊、骚扰阿蚊为优势蚊种,羊圈以中华按蚊、骚扰阿蚊为优势蚊种,猪圈以三带喙库蚊、中华按蚊和骚扰阿蚊为优势蚊种。采用JEV PrME基因特异引物对采集到蚊虫和库蠓标本分162批进行扩增、测序,采用生物信息学软件进行序列分析。结果显示,4株蚊虫携带的病毒均为基因Ⅰ型JEV,与疫苗株SA14-14-2 E蛋白存在15个氨基酸差异位点,在8个影响病毒毒力的重要位点上未发生突变。以上结果提示珠江上游地区存在多种蚊虫种类,三带喙库蚊和中华按蚊是该地区的优势蚊种,三带喙库蚊是当地JEV的主要传播媒介,在当地的媒介中存在基因Ⅰ型JEV流行,而流行株的毒力并未降低。

关键词: 乙型脑炎病毒; 蚊虫分类; 库蠓; PrM基因; E基因

Abstract:

This experiment was conducted to understand mosquito species, distribution of the main vector of Japanese encephalitis virus (JEV), JEV genotype and molecular characteristics in upper Pearl River region. We collected mosquito and Culicoides specimen in Shizong county, upper Pearl River region in July 2013, and these specimens were classified and identified. Meanwhile, JEV nucleotide were detected using PrM and E genes specific primers in 162 pools of mosquito and Culicoides specimen, and the positive specimens were sequencd and analyzed by bioinformatics software. Total 3 705 mosquitoes were collected from 4 collection spots, and the mosquitoes belong to 7 species in 4 generas: Culex, Anopheles, Aedes and Armigeres. In cattle pens, Anopheles Sinensis and Armigeres subalbatus were the dominant mosquito species. In sheep pens, Anopheles Sinensis and Armigeres subalbatus were the dominant mosquito species. And in pig pens, Culex tritaeniorhynchus, Anopheles Sinensis and Armigeres subalbatus were the dominant mosquito species. 4 of 162 pools mosquito and Culicoides were positive detecting by using PrM and E genes specific primers. Sequence analysis of JEV PrM and E genes results showed that 4 strains virus from Culex tritaeniorhynchus samples belonged to genotype Ⅰ JEV, and existing 15 amino acid difference sites between vaccine strain SA14-14-2 in the E gene protein, and 8 important sites which affected virus virulence did not mutant. These results suggested that there were many mosquito species in upper Pearl River region, and Culex tritaeniorhynchus, Anopheles Sinensis were dominant mosquito species in this region, and Culex tritaeniorhynchus was the main media of JEV in local region, genotypeⅠ JEV was popular in local media, and virulence of the pandemic strain did not reduce.

Key words: Japanese encephalitis virus; classification of mosquito; Culicoides; PrM gene; E gene

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