3Robinson A J, ELLIS G and Balassu T.The genome of orf virus:restriction endonuclease analysis of viral DNA isolated from lesions of orf in sheep[J] .Arch Virol, 1982,71,43 - 55.
4Livingston C W and Hardy W T.Longevity of contagious ecthyma virus[J]. J Am Vet Med Ass, 1960,137: 651.
5Nagington J and Whittle C H.Human orf : isolation of the virus by tissue culture[J] .Br Med J, 1961,2:1324-1326.
8Robinson A J,Barns G. Conservation and variation in Orf virus genomes[J] .Virol, 1987, 157: 13-23.
9Housawi F M, T Roberts,Gilray G M et al. The reactivity of monoclonal antibodies against orf virus with other parapoxviruses and the identification of a 39 kDa immunodominant protein .Arch Virol,1998, 143: 2289 - 2303.
10Mckeever D J, Reid H W ,Inglis N F and Herring A J.A qualitative and quantitative assessment of the humoral antibody response of the sheep to orf virus infection. Vet Micro, 1987, 15: 229-241.
2Buddle B M, Pulford H D. Effect of passively aquired antibodies and vaccination on the immune response to contagious ecthyma virus[J].Vet Microbiol, 1984,9:515-522
3HussainKA, BurgerD. InVivoand in vitro characteristics of Contagious Ecthyma Virus isolations:host response mechanism[J].Vet Micro, 1989(19):23-36
