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Molecular characterization of Echinococcus isolates of cervid origin from Finland and Sweden.

机译：源自芬兰和瑞典的宫颈棘球E球菌的分子鉴定。

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摘要

The species Echinococcus granulosus is made up of several genotypic strain groups, whose taxonomical classification is still undetermined. Genotypes in the cervid-wolf life-cycle are poorly known, especially in Europe. In this study, 33 Echinococcus isolates from cervids from Finland and Sweden were characterized using mitochondrial ND1 gene sequencing. In addition, phylogenetic analysis of E. granulosus strains using the mitochondrial ATP6, ND1, ND3 and CO1 genes was performed using maximum likelihood, neighbour-joining and maximum parsimony methods. The Finnish and Swedish cervid isolates were found to represent the genotype G10. In the phylogenetic analyses, the camel (G6), pig (G7), cervid (G8) and Fennoscandian cervid (G10) strains clustered in a well-supported monophyletic group. This group differed clearly from the common sheep (G1) and horse (G4, 'E. equinus') strains, but was closely related to the cattle strain (G5, 'E. ortleppi'). Our results support the previous studies suggesting that the genotypes G6-10 should be separated from the species E. granulosus sensu stricto. However, additional morphological studies are needed, and the relationship to the cattle strain ('E. ortleppi') should be thoroughly evaluated before a final decision of the taxonomical status of the G6-10 group can be made.
机译：细粒棘球E菌种由几个基因型菌株组组成，其分类学分类仍未确定。子狼生活周期中的基因型知之甚少，尤其是在欧洲。在这项研究中，使用线粒体ND1基因测序对来自芬兰和瑞典的33种棘球E球菌进行了鉴定。另外，使用线粒体ATP6，ND1，ND3和CO1基因对细粒肠球菌菌株进行了系统进化分析，方法是采用最大似然法，邻域结合法和最大简约法。发现芬兰和瑞典的宫颈分离株代表基因型G10。在系统发育分析中，骆驼（G6），猪（G7），宫颈（G8）和粉刺蕨（Gennoscandian cervid）（G10）菌株聚集在一个得到良好支持的单一系统类群中。该组与普通绵羊（G1）和马（G4，'E。equinus'）菌株明显不同，但与牛系（G5，'E。ortleppi'）密切相关。我们的结果支持以前的研究，建议将基因型G6-10与严格的E. granulosus sensu物种分开。但是，还需要进行其他形态学研究，在可以最终决定G6-10组的生物分类地位之前，应彻底评估与牛株（'E. ortleppi'）的关系。

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