Management and Feeding Strategies to Reduce the Impact of Porcine Delta Coronavirus in Nursery Pigs

摘要

Porcine delta coronavirus (PDCoV) and porcine epidemic diarrhea (PEDv) have economically impacted the pork industry. These viruses are known to be transmitted via fecal matter and raises concerns of biosecurity. The objectives were to determine mitigation strategies to minimize or eliminate the risk of virus transmission among swine herds. From the studies conducted we concluded that different feed ingredients pose different risks, with premix having the greatest. Feed additives were not effective at the recommended concentrations which were Acid Booster and KEMGEST 10 mg, Activate DA, sugar and salt 20 mg, UltraAcid P 150 mg, and Amasil 46 mul, Luprosil 56 mul/5 g of complete feed. However, at double the recommended concentrations which were Acid Booster and KEMGEST 20 mg, Activate DA, sugar and salt 40 mg, UltraAcid P 300 mg, Amasil 92 mul, and Luprosil 112 mul/5 g of complete feed greater inactivation was achieved. Additionally, exposing the virus to greater temperatures reduced the risk of transmission. The influence of relative humidity on virus inactivation was unclear. Ultra violet irradiated spray dried porcine plasma reduces the risk of transmission while not decreasing the activity of essential functional proteins (e.g., immunoglobulins, growth factors) needed for nursery pigs during health challenges. Therefore, proper mitigations strategies will reduce the risk of transmission of PDCoV.