7Concha-Bermejillo A,Guo J, Zhang Z, et al. Severe persistent orf in young goats[J]. J Vet Diagn Invest, 2003,15 : 423-431.
8MeInnes C J, Wood A R, Nettleton P E, et al. Genomic comparison of an a virulent strain of orf virus with that of a virulent wild type isolate reveals that the orf virus G2L gene is nonessential for replication[J]. Virus Gen,2001,22 (2) : 141-150.
9Housawi F M,Roberts G M,Gilray J A,et al. The reactivity of monoclonal antibodies against orf virus with other parapoxviruses and the identification of a 39 kDa immunodominant protein [J]. Arch virol,1998,143(12): 2289 -2303.
10Mazur C,Ferreira I,Rangel Filho F B,et al. Molecular charac- terization of Brazilian isolates of orf virus[J]. Vet Mierobiol, 2000,73 : 253-259.