7Hall WV.Porcine reproductive and respiratory syndrome (PRRS) virus-a significant disease of pigs[J].Aust VetJ,2005,83(5):260 -261.
8Prieto C,Castro J M.Porcine reproductive and respiratory syndrome virus infection in the boar:a review[J].Theriogenology,2005,63 (1):1-16.
9Keffaber K K.Reproductive failure of unknown etiology[J].Am Assoc Swine Pract Newsl,1989,(1):1-10.
10Liu J,Henkel T.Traditional Chinese medicine (TCM) are polyphenols and saponins the key ingredients triggering biological activities[J].Curr Med Chem,2002,9(15):1483 -1485.