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Molecular Characterization of Spp., , and in Dairy Goat Kids with Diarrhea in Partial Regions of Shaanxi Province, China

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Journal Animals (Basel)
Date 2023 Sep 28
PMID 37760322
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Abstract

spp., , and are important diarrheal pathogens threatening the health of humans and various animals. Goats, especially pre-weaned goat kids, that carry these pathogens are important reservoirs related to human infection. In the present study, PCR-based sequencing techniques were applied to characterize spp., , and in 202 fecal samples of diarrheal kids for Guanzhong dairy goats from five locations in Shaanxi Province. The positive rates of spp., , and were 37.6% (76/202), 16.3% (33/202), 55.4% (112/202) and 78.7% (159/202) in these goat kids, respectively. Co-infection of two to four pathogens was found in 114 of 202 fecal samples. Significant differences ( < 0.001) in the positive rates of spp. and were found among locations and age groups. Furthermore, two species ( and ), two assemblages (E and A), nine genotypes (CHG3, CHG1, BEB6, CHG5, CHG2, SX1, CHG28, COS-II and CD6) and two pathotypes (EPEC and EHEC) were identified. As for , two (IIdA19G1 and IIdA19G2) and two (XXIIIa and XXIIIg) subtypes were recognized in samples positive for and , respectively. A phylogenetic analysis based on the ITS locus of indicated that all nine genotypes of identified in this study belonged to the group 2. Four virulence factors (, , and ) of EPEC and EHEC were found in strains. Collectively, this study explored the colonization frequency of spp., , and in diarrheal kids of Guanzhong dairy goats in Shaanxi Province and expanded our understanding of the genetic composition and zoonotic potential of these pathogens in goats.

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