ArterivirusArterivirus InfectionsArteritis Virus, EquinePorcine respiratory and reproductive syndrome virusNidoviralesArteriviridaeLactate dehydrogenase-elevating virusPorcine Reproductive and Respiratory SyndromeRNA ReplicaseRNA, ViralMolecular Sequence DataOpen Reading FramesGenome, ViralViral Nonstructural ProteinsVirus ReplicationHorsesCricetinaePhylogenyRNA, Ribosomal, 16SDNA, RibosomalCell Line