Geographical patterns of Toxoplasma gondii genetic diversity revealed by multilocus PCR-RFLP genotyping

文献类型： 外文期刊

第一作者： Shwab, E. Keats

作者： Shwab, E. Keats;Majumdar, Debashree;Su, Chunlei;Zhu, Xing-Quan;Su, Chunlei;Pena, Hilda F. J.;Gennari, Solange M.;Dubey, Jitender P.

作者机构：

关键词： Toxoplasma gondii;PCR-RFLP;genotyping;population structure;genetic diversity

期刊名称：PARASITOLOGY （ 影响因子：3.234； 五年影响因子：3.118 ）

ISSN： 0031-1820

年卷期： 2014 年 141 卷 4 期

页码：

收录情况： SCI

摘要： In recent years, an extensive collection of Toxoplasma gondii samples have been typed using a set of 10 PCR-RFLP genetic markers. Here we summarize the data reported until the end of 2012. A total of 1457 samples were typed into 189 genotypes. Overall, only a few genotypes dominate in the northern hemisphere, which is in stark contrast to the southern hemisphere where hundreds of genotypes coexist with none being notably dominant. PCR-RFLP genotype #1 (Type II clonal), #2 (Type III), #3 (Type II variant) and #10 (Type I) are identified globally. Genotypes #2 and #3 dominate in Africa, genotypes #9 (Chinese 1) and #10 are prevalent in Asia, genotypes #1, #2 and #3 are prevalent in Europe, genotypes #1, #2, #3, #4 and #5 dominate in North America (#4 and #5 are collectively known as Type 12). In Central and South America, there is no clear dominance of any genotype even though a few have relatively higher frequencies. Statistical analysis indicates significant differences among populations in Africa, Asia, Europe, North America, and Central and South America, with only Europe and North America exhibiting similar diversity. Collectively, the results revealed distinct population structures and geographical patterns of diversity in T. gondii.

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