2Pinto C, Julio V. Santiago Urcelay,Biosecurity practices on intensive pig production systems in Chile [J]. Prey Vet Med,2003, 59: 139-145.
3Ribbens S, Dewulf J, Koenen F,et al. A survey on biosecurity and managementpractices in Belgian pig herds[J]. Prev Vet Med,2008, 83:228-241.
4AYOADE G O, ADEYEMI I G. African swine fe- ver: an overview[J]. Revue Elev Med Vet Pays Trop, 2003, 56(3-4) :129-134.
5BROWN F. The classification and nomenclature of viruses: summary of results of meetings of the Inter- national Committee on Taxonomy of Viruses in Sen- dai,September 1984[J]. Intervirology, 1986, 25: 141-143.
6COSTA J V. African swine fever virus[M]//Molec- ular Biology of Iridoviruses. Norwell G D. MA: Klu- wer, 1990: 247-270.
7DIXON L K, ROCK D L, VINUELA E. African swine fever-like viruses [ M ]//Virus Taxonomy. Murphy F A,Fauquet C M,Bishop D H L,et al. Vi- enna & New York: Springer-Verlag, 1995: 92-94.
8AFONSO C L,ZSAK L,CARRILLO C, et al. Afri- can swine fever virus NL gene is not required for vi-rus virulence[J]. J Gen Virol, 1998, 79:2543-2547.
9PENRITH M L,THOMSON African Livesto Town: swine fever[ M]// ck. Coetzer J A W, T G R,BASTOS A D S. Infectious Diseases of ustin R C. 2^nd ed. Cape Oxford University Press, 2004 : 1087-1119.
