| 英文摘要 |
Porcine reproductive and respiratory syndrome virus (PRRSV) is the causative pathogen of porcine reproductive and respiratory syndrome (PRRS). one of the most important diseases in the swine industry (Beyer et al., 2000). PRRS was first described in the late 1980s in North America and then has spread globally with an estimated loss of USD 664 million annually in the swine industry in the USA (Holtkamp et 2012), Approximately two million pigs were infected with PRRSV and highly pathogenic PRRSV (HP-PRRSV) per year (Tian et al., 2007). The development of safe and effective vaccines against PRRS infection has been considered as an important approach in the prevention and control of this disease. |
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