Fasciolopsis buski (Digenea: Fasciolidae) from China and India may represent distinct taxa based on mitochondrial and nuclear ribosomal DNA sequences

文献类型： 外文期刊

第一作者： Ma, Jun

作者： Ma, Jun;Sun, Miao-Miao;He, Jun-Jun;Liu, Guo-Hua;Zhu, Xing-Quan;Sun, Miao-Miao;Liu, Guo-Hua;Ai, Lin;Chen, Mu-Xin;Zhu, Xing-Quan

作者机构：

关键词： Fasciolopsis buski;Mitochondrial DNA;Nuclear ribosomal DNA;Phylogenetic analysis

期刊名称：PARASITES & VECTORS （ 影响因子：3.876； 五年影响因子：3.959 ）

ISSN： 1756-3305

年卷期： 2017 年 10 卷

页码：

收录情况： SCI

摘要： Background: Fasciolopsis buski is a zoonotic intestinal fluke infecting humans and pigs, but it has been seriously neglected. It is yet to know whether there is any genetic diversity among F. buski from different geographical locations, particularly in sequences of nuclear ribosomal DNA (rDNA) and mitochondrial (mt) DNA. Therefore, we determined the sequences of partial 18S, the complete internal transcribed spacer (ITS) rDNA and the complete mt genome of F. buski from China, compared the rDNA and mtDNA sequences with those of isolates from India and Vietnam, and assessed the phylogenetic relationships of this fluke and related fasciolid trematodes based on the mtDNA dataset. Results: The complete mt genome sequence of F. buski from China is 14,833 bp, with 36 genes, including 12 protein-coding genes (PCGs), 22 tRNA genes, and two rRNA genes (rrnL and rrnS). The AT content of F. buski from China is 65.12%. The gene content and arrangement of the F. buski mt genome is similar to that of Fascioloides magna. Genetic distances between isolates of F. buski from China and India were high (28.2% in mtDNA, 13.2% in ITS-1 and 9.8% in ITS-2) and distinctly higher than the interspecific differences between Fasciola hepatica and Fasciola gigantica. The rDNA and mtDNA datasets for F. buski from China (isolate from pigs) and Vietnam (isolates from humans) were identical. The intergeneric differences in amino acid and nucleotide sequences among the genera Fasciolopsis, Fascioloides and Fasciola ranged between 24.64-25.56% and 26.35-28.46%, respectively. Conclusions: Our results indicate that F. buski from China and India may represent distinct taxa, while F. buski in Vietnam and China represent the same species. These findings might have implications for the implementation of appropriate control strategies in different regions. Further studies are needed to decode mtDNA and rDNA sequences of F. buski from various geographical isolates for the better understanding of the species complex of F. buski.

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