1Fernelius A L,Amtower W C, et al. Bovine viral diarrhea virus in swine: characteristics of virus recovered from naturally and experi- mentally infected swine[J]. Can J Comp Med, 1973,37 : 13 - 20.
2Khan F A, Chaudhry Z I, All M I, et al. Detection of Mycobacte- rium avium subsp, paratuberculosis in tissue samples of cattle and buffaloes[J].Trop Anim Health Prod,2010,42(4) :633-638.
3Raymond C R, Wilkie B N. Th-1/Th-2 type cytokine profiles of pig T cells cultured with antigen-treated monoeyte-derived den- dritic cells[J]. Vaccine,2004,22(8);1016-1023.
4Whittington R J, Sergeant E S. Progress towards understanding the spread,detection and control of Myeobaeterium avium subsp. paratuhereulos in animal populations [J].Aust Vet J,2001,79 (4) :267-278.