数字农科院2.0

Prevalence and multilocus genotyping of Giardia duodenalis in zoo animals in three cities in China

文献类型： 外文期刊

作者： Zou, Yang;Li, Xiao-Dong;Meng, Yu-Meng;Wang, Xiao-Long;Wang, Hao-Ning;Zhu, Xing-Quan

作者机构：

关键词： Giardia duodenalis;Zoo animals;Prevalence;Multilocus genotypes;Genetic divergence;China

期刊名称： PARASITOLOGY RESEARCH

ISSN： 0932-0113

年卷期： 2022 年

页码：

收录情况： SCIE（2022版）

摘要： Giardia duodenalis is a flagellated parasitic microorganism that parasitizes in the intestines of humans and animals. Although asymptomatic infections commonly exist in both humans and animals, some enteric symptoms have been reported in immunocompromised individuals, posing a threat to public health. Children could be infected with G. duodenalis through an environment contaminated by infective animals. Thus, the investigation of the prevalence and genotypes of G. duodenalis in zoo animals is important. In this study, 672 fecal samples of 113 species of animals, including non-human primates, artiodactyla, perissodactyla, proboscidian, marsupial, birds, carnivora, and rodents, were collected from three zoos in Hangzhou city, Dalian city, and Suzhou city in China. The samples were screened for the positivity of G. duodenalis by nested PCR based on the beta-giardin (bg), triosephosphate isomerase (tpi), and glutamate dehydrogenase (gdh) gene loci. The overall G. duodenalis prevalence was 10.6% (71/672). The prevalence in non-human primates, artiodactyla, perissodactyla, proboscidian, marsupial, birds, carnivora, and rodent was 6.9% (10/144), 9.0% (12/133), 17.1% (6/35), 0% (0/6), 8.7% (2/23), 13.3% (28/211), 6.7% (7/105), and 40.0% (6/15), respectively. The region and category were considered risk factors for G. duodenalis infection in zoo animals (p < 0.001). Additionally, four genotypes of G. duodenalis were identified in zoo animals, including assemblage E (n = 46), assemblage A (n = 18), assemblage B (n = 6), and assemblage D (n = 1). The assemblages A, B, D, and E are also genotypes observed in humans and other animals. Among the sequences obtained in our study, one multilocus genotype (MLG) of the sub-assemblage AI was observed within assemblage A. Furthermore, three MLGs were detected within assemblage B. These findings reveal G. duodenalis genetic variability in zoo animals in three cities in China and suggest that zoo animals could be a potential source of human infection with G. duodenalis.

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