5Andreyev V G , Wesley R D, Mengeling W L, et al. Genetic varia-tion and phylogenetic relationships of 22 porcine reproductive and respiratory syndrome virus (PRRSV) field strains based on sequence analysis of open reading frame 5[J]. Archives of Virol-ogy,1997,142(5):993-1001.
6Bautista E M, Molitor T W. IFN inhibits porcine reproductive and respiratory syndrome virus replication in macrophages[J]. Arch ViroI,1999,144(6) :1191-1200.
7Charerntantanakul W, Platt R, Johnson W, et al. Immune re-sponses and protection by vaccine and various vaccine adjuvant candidates to virulent porcine reproductive and respiratory syn-drome virus[J]. Vet Immunol Irnmunopathol , 2006,109 (2) : 99 -115.
8Chen C, Cui S, Zhang C, et al. Development and validation of re-verse transcription loop-mediated isothermal amplification for detection of PRRSV[J]. Virus Genes, 2010 ,40(1): 76-83.
9Dea S, Gagron C A, Mardassi H, et al. Antigenic variability among North American and European strains of porcine repro-ductive and respiratory syndrome as defined by monoclonal anti-bodies to the matrix protein [J]. J Clin Microiol , 1996,34 (6) : 1488- 1493.
10Deiputte P L, Meerts P, Costers S, et al. Effect of virus specific antibodies on attachment internalization and infection of porcine reproductive and respiratory syndrome virus in primary macro-phages [J]. Veterinary Immunology and Immunopathology, 2004a,102(3):179-188.
