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Occurrence and genotypes of Cryptosporidium spp., Giardia duodenalis, and Blastocystis sp. in household, shelter, breeding, and pet market dogs in Guangzhou, southern China

文献类型： 外文期刊

作者： Liao, Shenquan 1 ; Lin, Xuhui 1 ; Sun, Yongxiang 1 ; Qi, Nanshan 1 ; Lv, Minna 1 ; Wu, Caiyan 1 ; Li, Juan 1 ; Hu, Junjin 1 ;

作者机构： 1.Guangdong Acad Agr Sci, Key Lab Livestock Dis Prevent Guangdong Prov, Guangzhou 510640, Guangdong, Peoples R China

2.Guangdong Acad Agr Sci, Guangdong Lab Lingnan Modern Agr, Maoming Branch, Guangzhou 510640, Guangdong, Peoples R China

3.Guangdong Acad Agr Sci, Minist Agr, Sci Observat & Expt Stn Vet Drugs & Diagnost Tech, Guangzhou 510640, Guangdong, Peoples R China

4.Guangdong Acad Agr Sci, Inst Anim Hlth, Guangzhou 510640, Guangdong, Peoples R China

5.South China Agr Univ, Coll Vet Med, Guangzhou 510640, Guangdong, Peoples R China

期刊名称：SCIENTIFIC REPORTS （ 影响因子：4.379； 五年影响因子：5.133 ）

ISSN： 2045-2322

年卷期： 2020 年 10 卷 1 期

页码：

收录情况： SCI

摘要： Cryptosporidium spp., Giardia duodenalis, and Blastocystis sp. are common intestinal protozoans that infect humans and animals worldwide. A survey that assessed the prevalence, molecular characteristics, and zoonotic potential of these pathogens was conducted on a variety of dogs in Guangzhou, southern China. A total of 651 canine stool samples from household (n=199), shelter (n=149), breeding (n=237), and pet market dogs (n=66) were collected from eight districts in Guangzhou. Cryptosporidium spp., Giardia duodenalis, and Blastocystis sp. were detected by PCR amplification of the SSU rRNA gene. Giardia duodenalis-positive specimens were further assigned into assemblages using the glutamate dehydrogenase gene. Cryptosporidium spp., G. duodenalis, and Blastocystis sp. were found in 21 (3.2%), 20 (3.1%), and 35 (5.4%) samples, respectively. The overall prevalence of shelter dogs (40.28%, 60/149) was significantly higher than that of household (3.0%, 6/199), breeding (2.1%, 5/237), and pet market dogs (7.5%, 5/66) (chi (2)=154.72, df=3, P<0.001). Deworming in the past 12 months had a strong protective effect on the risk of contracting parasite infections (P<0.001). No significant differences were detected between age or sex groups (P>0.05). Dog-specific C. canis (n=19) and zoonotic C. parvum (n=2) were the only two Cryptosporidium species. Sequence analysis revealed the presence of three G. duodenalis assemblages: dog-specific assemblages D (n=14) and C (n=5), and cat-specific F (n=1). Zoonotic Blastocystis ST3 (n=28) was the dominant subtype, followed by ST1 (n=6) and ST10 (n=1). To our knowledge, this is the first large-scale investigation on the occurrence and molecular characteristics of Blastocystis sp. in dogs in China. Our results indicated that the dogs seemed to play a negligible role as reservoirs for Cryptosporidium spp. and G. duodenalis transmission to humans, but they are potential novel suitable hosts of Blastocystis sp. A strict sentinel surveillance system of dogs should be established to minimise the zoonotic risk of spreading blastocystosis among humans and dogs.

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