To identify the pathogen of diarrhea of piglets in a large-scale pig farm and prepare the specific yolk antibody,bacterial iso⁃lation and culture,biochemical test,16SrRNA PCR identification,phylogenetic tree analysis,drug sensitivity test and other methods were used to ...MORE To identify the pathogen of diarrhea of piglets in a large-scale pig farm and prepare the specific yolk antibody,bacterial iso⁃lation and culture,biochemical test,16SrRNA PCR identification,phylogenetic tree analysis,drug sensitivity test and other methods were used to ...