Transmissible gastroenteritis virusGastroenteritis, Transmissible, of SwineCoronaviridaeCoronavirus, CanineCoronavirusGastroenteritisSwineViruses, UnclassifiedAntigens, CD13Caliciviridae InfectionsNorovirusCoronavirus, FelineSwine DiseasesNeutralization TestsRotavirus InfectionsSpike Glycoprotein, CoronavirusAntibodies, ViralJejunumCoronavirus Infections