Genetic characterization of Toxoplasma gondii in Yunnan black goats (Capra hircus) in southwest China by PCR-RFLP

文献类型： 外文期刊

第一作者： Miao, Qiang

作者： Miao, Qiang;Yu, Xin;Yang, Yan;Yang, Jian-Fa;Zhu, Xing-Quan;Zou, Feng-Cai;Miao, Qiang;Huang, Si-Yang;Qin, Si-Yuan;Zhu, Xing-Quan;Qin, Si-Yuan

作者机构：

关键词： Toxoplasma gondii;Genotype;PCR-RFLP;Yunnan black goats;China

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： 2015 年 8 卷

页码：

收录情况： SCI

摘要： Background: Toxoplasma gondii is a protozoan parasite that infects almost all warm-blooded animals and human beings. Goats are one of the susceptible animals to T. gondii. However, little is known of genetic diversity of T. gondii in Yunnan black goats in China. The objective of this present study was to determine the genotypes of T. gondii isolates from black goats in Yunnan province, southwest China. Methods: Genomic DNA was extracted from liver (n = 403), lung (n = 403) and lymph nodes (n = 250) of Yunnan black goats and assayed for T. gondii infection by semi-nested PCR of B1 gene. Then, the positive DNA samples were typed at 10 genetic markers using polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) technology. These markers include 9 nuclear loci, namely, SAG1, SAG2 (5'-SAG2 and 3'-SAG2, alternative SAG2), SAG3, BTUB, GRA6, c22-8, c29-2, L358, PK1, and an apicoplast locus Apico. Results: Out of 403 tested samples, 20 (4.96%) DNA samples were T. gondii positive by amplification of B1 gene. Among them, 2 isolates were genotyped at all loci, and 6 isolates were genotyped for 8 or more loci. In total, seven samples belong to ToxoDB PCR-RFLP genotype#10 (Type I), and one belongs to genotype ToxoDB #9. Conclusions: To our knowledge, this is the first report of ToxoDB#9 and ToxoDB#10 T. gondii in Yunnan black goats in China. These results revealed a wide distribution of these T. gondii in Yunnan black goats in China, which has important implications for public health.

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