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Porcine reproductive and respiratory syndrome (PRRS) is an immunosuppressive disease that is characterized by respiratory distress and poor growth in piglets and by severe reproductive failure in sows. PRRS was first recognized in the 1990s in Europe and the United States. In 2006, highly pathogenic (HP)-PRRS caused enormous economic losses in China. Our previous studies demonstrated that the HP-PRRS...
Porcine parvovirus (PPV), a member of the genus Parvovirus, family Parvoviridae, is a significant causative agent in porcine reproductive failure, causing serious economic losses in the swine industry. Previous phylogenetic studies based on the NS1 or VP2 genes indicated that current PPV strains diverged 30 years ago and that VP2 was under neutral or positive selection. Our analysis of NS1, VP2 and...
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