title: USDA to require reports of PED.
mesh_terms: D000818:Animals; D018352:Coronavirus Infections / Q000453:epidemiology / Q000662:veterinary* / Q000821:virology; D058872:Epidemics / Q000517:prevention & control / Q000662:veterinary; D053485:Porcine epidemic diarrhea virus / Q000302:isolation & purification*; D013552:Swine; D013553:Swine Diseases / Q000453:epidemiology / Q000821:virology*; D014481:United States / Q000453:epidemiology; D016885:United States Department of Agriculture / Q000331:legislation & jurisprudence*