Porcine Deltacoronavirus(PDCoV)is a pig intestine coronavirus that causes severe watery diarrhea,vomiting,and dehydration in pigs.The PDCoV genome is a single-stranded positive-stranded RNA with a similar structure to the PEDV genome.The genome size is 25.4 kb and contains 5'and 3'untranslated regions and seven open reading frames.With the continuous epidemic and evolution of PDCoV in the world,it has brought new challenges to the prevention and control of diarrheal diseases in pigs.Therefore,extensive coll...