文献类型： 外文期刊
作者： Qi, Meng 1 ; Ji, Xiangbo 2 ; Zhang, Ying 1 ; Wei, Zilin 1 ; Jing, Bo 1 ; Zhang, Longxian 3 ; Lin, Xuhui 4 ; Karim, Md Rob 1 ;
作者机构： 1.Tarim Univ, Coll Anim Sci, Alar 843300, Xinjiang, Peoples R China
2.Henan Univ Anim Husb & Econ, Expt & Res Ctr, Zhengzhou, Peoples R China
3.Henan Agr Univ, Coll Anim Sci & Vet Med, Zhengzhou 450046, Henan, Peoples R China
4.Guangdong Acad Agr Sci, Inst Anim Hlth, Key Lab Livestock Dis Prevent Guangdong Prov,Mini, Sci Observat & Expt Stn Vet Drugs & Diagnost Tech, Guangzhou 510640, Guangdong, Peoples R China
5.Bangabandhu Sheikh Mujibur Rahman Agr Univ, Dept Med, Gazipur 1706, Bangladesh
关键词： Giardia duodenalis; Racehorse; Prevalence; Genotyping; Zoonotic; Host specificity
期刊名称：PARASITOLOGY RESEARCH （ 影响因子：2.289； 五年影响因子：2.403 ）
ISSN： 0932-0113
年卷期： 2020 年 119 卷 2 期
页码：
收录情况： SCI
摘要： Giardia duodenalis is a zoonotic intestinal parasite infecting humans and mammals worldwide. In this study, we evaluated the prevalence of G. duodenalis in racehorses in China and genetically characterized it. In total, 621 fecal samples were collected from racehorses at 17 equestrian clubs in 15 cities in China. Forty-eight (7.7%) animals from 11 equestrian clubs were positive for G. duodenalis of assemblages A (n = 10), B (n = 36), and E (n = 2), based on the small subunit ribosomal RNA (SSU rRNA) gene. Statistically significant differences in the prevalence of this parasite were detected among the different equestrian clubs (chi(2) = 49.55, df = 16, p < 0.01), whereas no significant differences were detected according to age (chi(2) = 0.64, df = 1, p > 0.05) or sex (chi(2) = 1.41, df = 2, p > 0.05). The G. duodenalis-positive samples were further subtyped based on three other genes, which identified 5, 4, and 4 genotypes at the triose phosphate isomerase (tpi), glutamate dehydrogenase (gdh), and beta-giardin (bg) loci, respectively. Subassemblage BIV was the predominant genotype. A phylogenetic analysis of the concatenated sequences of subassemblage BIV showed that the multilocus genotypes from the horses were genetically different from those of humans and nonhuman primates, indicating the evolution of host separation in G. duodenalis subassemblage BIV. Our study extends our understanding of the transmission of G. duodenalis between animals and humans.
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