R E V I E W A R T I C L E Swine enteric coronavirus disease: A review of 4 years with porcine epidemic diarrhoea virus and porcine deltacoronavirus in the United States and Canada M. C. Niederwerder1,2 | R. A. Hesse1,2 1Department of Diagnostic Medicine/ Pathobiology, College of Veterinary Medicine, Kansas State University, Manhattan, KS, USA 2Kansas State Veterinary Diagnostic Laboratory, Kansas State University, Manhattan, KS, USA Correspondence Megan C. Niederwerder, Department of Diagnostic Medicine/Pathobiology, College of Veterinary Medicine, Kansas State University, Manhattan, KS, USA. Email: