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The present study was aimed to investigate epidemiology and molecular characterizations of CoVs from companion animals in Chengdu city, Southwest China. 523 clinical samples from 393 animals were collected from one veterinary hospital between 2020 and 2021, and the presence of CoVs was detected by end-point PCR using pan-CoV assay targeting the RdRp gene. Partial and complete S genes were sequenced for further genotyping and genetic diversity analysis. A total of 162 (31.0%, 162\/523) samples and 146 (37.2%, 146\/393) animals were tested positive for CoVs. The positive rate in rectal swabs was higher than that in eye\/nose\/mouth swabs and ascitic fluid but was not statistically different between clinically healthy and diseased ones. Genotyping identified twenty-two feline enteric coronavirus (FCoV) I, four canine enteric coronavirus (CECoV) I, fourteen CECoV IIa, and one CECoV IIb, respectively. Eight complete S genes, including one canine respiratory coronavirus (CRCoV) strain, were successfully obtained. FCoV strains (F21071412 and F21061627) were more closely related to CECoV strains than CRCoV, and C21041821-2 showed potential recombination event. In addition, furin cleavage site between S1 and S2 was identified in two strains. The study supplemented epidemiological information and natural gene pool of CoVs from companion animals. Further understanding of other functional units of CoVs is needed, so as to contribute to the prevention and control of emerging infectious diseases.<\/jats:p>","DOI":"10.1155\/2023\/5056492","type":"journal-article","created":{"date-parts":[[2023,3,30]],"date-time":"2023-03-30T17:20:12Z","timestamp":1680196812000},"page":"1-9","source":"Crossref","is-referenced-by-count":2,"title":["Epidemiology and Molecular Characterizations of Coronavirus from Companion Animals Living in Chengdu, Southwest China"],"prefix":"10.1155","volume":"2023","author":[{"given":"Yingying","family":"Zhang","sequence":"first","affiliation":[{"name":"West China School of Public Health and West China Fourth Hospital, Sichuan University, 16#, Section 3, Renmin Road South, Chengdu, 610041, Sichuan, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lan","family":"You","sequence":"additional","affiliation":[{"name":"West China School of Public Health and West China Fourth Hospital, Sichuan 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