Porcine Reproductive and Respiratory Syndrome Virus and Equine Arteritis Virus (Arteriviridae)

Porcine reproductive and respiratory syndrome virus (PRRSV) and equine arteritis virus (EAV) are members of the family Arteriviridae in the suborder Arnidovirineae within the order Nidovirales. PRRSV is infectious for pigs (Sus scrofa) and likely other species in superfamily Suoidea; EAV is infectious for equids, as well as hybrid crosses (mules and hinnies). In common to both, these viruses are genetically diverse, are distributed globally, may produce clinical signs ranging from inapparent to severe, can produce chronic persistent infection, and are economically important pathogens in their target species.