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- W4296129136 abstract "Blastocystis is a gastrointestinal protozoan parasite commonly reported in humans and animals globally, including poultry, and it can cause zoonotic transmission of blastocystosis. However, comprehensive information is not available on the prevalence, subtype distribution and zoonotic potential of Blastocystis in chickens in China. In this study, a total of 1,000 individual fecal samples of free-range broiler chickens of 4 breeds were collected from 43 farms in 5 cities of Guangdong Province and investigated for the occurrence of Blastocystis infection. Blastocystis was determined by nested PCR analysis of the small subunit ribosomal RNA (SSU rRNA) gene. The overall prevalence was 20.1% (201/1,000) in chicken samples and 69.8% (30/43) in screened farms, and considerable variation in prevalence between farms was evident, with a range of 0 to 76.9%. Population differences of Blastocystis in broilers among sites, breeds, and ages were assessed. The highest infection rates were observed in Yangjiang city (35.8%, 38/106), Sanhuang chickens (29.7%, 104/350), and the >80-day-old chicken group (30.5%, 40/131). DNA sequencing and phylogeny analyses identified 2 zoonotic subtypes, ST6 and ST7. A large predominance was observed for ST7, and genetic polymorphisms were confirmed at the intra-ST7 level with the identification of 5 divergent ST7 types. The incidence of both STs varied largely based on the breed, site, farm, and age. This is the first large-scale study to explore the prevalence and genetic characteristics of Blastocystis in chickens in China. The widespread distribution and avian adaptation of both zoonotic subtypes were demonstrated. The findings of this study highlight a potential threat to humans and will provide a better understanding of the epidemiology and public health impact of poultry Blastocystis." @default.
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- W4296129136 date "2022-12-01" @default.
- W4296129136 modified "2023-09-30" @default.
- W4296129136 title "Research Note: Prevalence and zoonotic concern of Blastocystis in farmed chickens in southern China" @default.
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- W4296129136 doi "https://doi.org/10.1016/j.psj.2022.102182" @default.
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