a total of 2987 field diarrheal samples <*> were tested .
that variant PEDV , PDCoV , and SADS - CoV were leading etiologic agents of porcine diarrhea ,
To investigate the prevalence and genetic evolution of diarrhea - associated viruses responsible for the outbreaks , a total of 2987 field diarrheal samples collected from 168 pig farms in five provinces in Southern China during 2012 - 2018 were tested .
The findings of this study indicated that variant PEDV , PDCoV , and SADS - CoV were leading etiologic agents of porcine diarrhea , and either mono - infections or co - infections of pathogenic enteric CoVs were common in pigs in Southern China during 2012 - 2018 .