Molecular characterization of Japanese encephalitis viruses circulating in pigs and mosquitoes on pig farms in the Chinese province of Henan

文献类型： 外文期刊

第一作者： Teng, Man

作者： Teng, Man;Luo, Jun;Wang, Xing-Tao;Zhang, Gai-Ping;Fan, Jian-Ming;Yao, Wu;Chen, Lu;Wang, Chuan-Qing

作者机构：

关键词： China;Genotype 1;Genotype 3;JEV;Phylogenetic analysis;Pig

期刊名称：VIRUS GENES （ 影响因子：2.332； 五年影响因子：2.0 ）

ISSN：

年卷期：

页码：

收录情况： SCI

摘要： Since the first Chinese case report of Japanese encephalitis, Japanese encephalitis virus (JEV) has circulated in China for at least 60 years. Even though pigs play a critical role in the JEV transmission cycle information on the prevalence of JEV in pigs has not been investigated in China. As the central Chinese province of Henan has the largest human population in China, a history of serious JEV and is the largest pig producing province it was chosen for this study. We have found that currently natural infection with JEV in pigs and mosquitoes is prevalent and both genotypes 1 and 3 co-circulate in pigs and mosquitoes in central China. Phylogenetic analysis showed that all of the newly obtained pig-derived JEV isolates are more closely related to isolates from the 1950s to 1960s than to those recently isolated from humans and mosquitoes. Further analyses based on all the previous reported Chinese isolates indicates that presently genotype 3 JEV is the predominant genotype in pigs but genotype 1 JEV is emerging and spreading rapidly in recent years. Our study provides information for understanding the current epidemiology of JEV in China and suggests possible measures applicable to the further control of JEV. ? 2012 Springer Science+Business Media, LLC.

分类号： R37

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