数字农科院2.0

Genetic diversity in Echinococcus shiquicus from the plateau pika (Ochotona curzoniae) in Darlag County, Qinghai, China

文献类型： 外文期刊

作者： Fan, Yan-Lei;Lou, Zhong-Zi;Li, Li;Yan, Hong-Bin;Li, Jian-Qiu;Liu, Cong-Nuan;Jia, Wan-Zhong;Fan, Yan-Lei;Liu, Quan-Yuan;Zhan, Fang;Shi, Wan-Gui;Cai, Jin-Zhong;Lei, Meng-Tong;Yang, Yu-Rong;McManus, Donald P.;Jia, Wan-Zhong

作者机构：

关键词： E. shiquicus;Plateau pika;E. multilocularis;Restriction endonuclease analysis;Haplotype analysis;Genetic diversity

期刊名称： INFECTION GENETICS AND EVOLUTION

ISSN：

年卷期：

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收录情况： SCI

摘要： The metacestode of Echinococcus shiquicus has been recorded previously in the lung and liver of its intermediate host, the plateau pika (Ochotona curzoniae), but there is limited information regarding other organ sites. There is also limited evidence of intra-specific genetic variation within E. shiquicus. A PCR-amplified mitochondrial (mt) nad1 gene fragment (approximately 1400 bp in size), with unique EcoRI and SspI restriction sites, was used to distinguish cysts or cyst-like lesions of E. shiquicus from E. multilocularis. Then, the complete mt nad1 and cox1 genes for the E. shiquicus isolates were amplified and sequenced. Phylogenetic tree and haplotype network analyses for the isolates were then generated based on a concatenated dataset of the nad1 and cox1 genes using the neighbour-joining (NJ) method and TCS1.21 software. Nineteen of eighty trapped pikas were found to harbor cysts (71 in total) when dissected at the survey site. Seventeen animals had cysts (fertile) present only in the lungs, one animal had fertile cysts in the lungs and spleen, and one individual had an infertile kidney cyst. Restriction endonuclease analysis of a fragment of the nad1 gene indicated all the cysts were due to E. shiquicus. Genetic diversity analysis revealed that the nad1 andcox1 genes varied by 0.1-1.2% and 0.1-1.0%, respectively. Haplotype network analysis of the concatenated nad1 and cox1 sequences of the isolates showed they were classified into at least 6 haplotypes, and different haplotype percentages ranged from 4.2% to 29.6%. Although, high haplotype diversity was evident in the study area, the complete nad1 and cox1 gene sequences obtained indicated that all samples represented isolates of E. shiquicus. The study has also provided a new PCR-restriction endonuclease-based method to rapidly distinguish E. shiquicus from E. multilocularis which provides a useful tool for epidemiological investigations where the two species overlap. (C) 2016 Published by Elsevier B.V.

分类号： R1

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