title: The phylogenetic diversity of Spirometra erinaceieuropaei isolates from southwest China revealed by multi genes.
abstract: The larval plerocercoid of Spirometra erinaceieuropaei can parasitize humans, causing a serious food borne parasitic zoonosis known as sparganosis. Sparganosis have increased in China in recent years. In this study, the prevalence of sparganum infection in wild frogs in 9 geographical areas in southwest China was firstly investigated. Of 276 caught frogs, 55 frogs were found to be infected with sparganum. Then, the population genetic structure of these sparganum isolates was explored based on four molecular markers (cytb, cox1, rrnS and 28S rDNA D1). Highly genetic diversity and the genetic differentiation among sparganum isolates from different sites were revealed in the DNA polymorphism analyses. Both the phylogenetic inference and the analysis of the median-joining network supported two clades in the southwest S. erinaceieuropaei population. However, none demographic population expansion of the southwest S. erinaceieuropaei population was observed in the neutrality test, mismatch distribution analysis and Bayesian skyline plot analysis. Finally, the phylogenetic diversity of S. erinaceieuropaei from eastern, central, southern and southwest China was analyzed, the result suggested that Chinese S. erinaceieuropaei population should be divided into two groups (Group I and Group II), and they started to divergence in the middle Pliocene.
authors.affiliation: Department of Parasitology, Medical College, Zhengzhou University, Zhengzhou 450052, China.
authors.forename: Xi
authors.initials: X
authors.lastname: Zhang
authors.affiliation: Department of Parasitology, Medical College, Zhengzhou University, Zhengzhou 450052, China.
authors.forename: Han
authors.initials: H
authors.lastname: Wang
authors.affiliation: Department of Parasitology, Medical College, Zhengzhou University, Zhengzhou 450052, China. Electronic address: cuij@zzu.edu.cn.
authors.forename: Jing
authors.initials: J
authors.lastname: Cui
authors.affiliation: Department of Parasitology, Medical College, Zhengzhou University, Zhengzhou 450052, China.
authors.forename: Peng
authors.initials: P
authors.lastname: Jiang
authors.affiliation: Department of Parasitology, Medical College, Zhengzhou University, Zhengzhou 450052, China.
authors.forename: Mei Long
authors.initials: ML
authors.lastname: Lin
authors.affiliation: Department of Parasitology, Medical College, Zhengzhou University, Zhengzhou 450052, China.
authors.forename: Yun Lu
authors.initials: YL
authors.lastname: Zhang
authors.affiliation: Department of Parasitology, Medical College, Zhengzhou University, Zhengzhou 450052, China.
authors.forename: Ruo Dan
authors.initials: RD
authors.lastname: Liu
authors.affiliation: Department of Parasitology, Medical College, Zhengzhou University, Zhengzhou 450052, China. Electronic address: wangzq@zzu.edu.cn.
authors.forename: Zhong Quan
authors.initials: ZQ
authors.lastname: Wang
mesh_terms: D000818:Animals; D000835:Animals, Wild; D001001:Anura; D001499:Bayes Theorem; D002681:China / Q000453:epidemiology; D014644:Genetic Variation; D006801:Humans; D010802:Phylogeny; D013031:Sparganosis / Q000635:transmission*; D013146:Spirometra / Q000235:genetics* / Q000302:isolation & purification; D015047:Zoonoses
keywords: Genetic structure; Infection; Southwest China; Sparganum; Spirometra erinaceieuropaei