3Fano E,Olea L,Pijoan C.Eradication of porcine reproductive and respiratory syndrome virus by serum inoculation of naive gilts[J].Can J Vet Res,2005,69:71-74.
4Zimmerma J an update on prrsv:prevention,control and diagnosis[C].The 19th international pig veterinary society congress copenhagen,denmark,2006.
5Menard J,D'Allaire L,Batista S.Gilt exposure to homologous porcine reproductive and respiratory syndrome (PRRS) virus strain during acclimatization as a tool for PRRS control[C].5 th international symposium on emerging and re-emerging pig diseases,Krakow Poland,2007.
