1AUende R,l_aegreid WW,Kutish GF,et al:Porcine reproductive and respiratory syndrome virus:Description of persistence in individual pigs upon experimental infection..J Virol 74:10834,2000
2Bautista E,Molitor I:IFN gamma inhibits porcine reproductive and respiratory syndrome virus replication in macrophages.Arch Virol 144:1191,1999
3De Bruin MG,Samson JN,Voermans JJ,et al:Effects of a porcine reproductive and respiratory syndrome vires infection on the development of the immune response against pseudorabies virus Vet Immunol Immunopathol 76:125,2000
4Heinen PP,van Nieuwstadt AP,Pol JMA,et al:Systemic and mucosal isotype-speciflc antibody responses to pigs to experimental influenza virus infection Viral Immunol 13:237,200029 Huang H,Potter AA,Campos M,et al:Pathogenesis of porcine Actinobacillus pleuro pneumonia,Part Ⅱ:Roles of proinflammatory cytokines Can J Vet Res 63:69,1999
5Karasin Al,Schutten MM,Cooper I_A,et al:Genetic characterization of H3N2 influenza viruses isolated from pigs in North America,1977-1999:Evidence roi wholly human and reassortant virus genotypes.Virus Res 68:71,2000
6Larsen DL,Karasin A,Zuckermann F,et al:Systemic and mucosal immune responses to H1N1 influenza virus infection in pigs.Vet Microl 74:117,2000
7Meier W,Wheeler J,Husman RJ,et al:Characteristics of the immune response of pigs to PRRS vi,us In Proceedings of PRRS and Aujeszky's Disease,Ploufragen,France,1999,p71
8Pogrardchnyy RM,Yoon KJ,Harms PA,et al:Characterization of immune response of young pigs to porcine circovirus type 2infection Viral Immunol 13:143,2000
9Ihaeker EL.,Halbur PG,Ross RF,et al:Mycoplasma hyopneumoniae potentiation of porcine reproductive and respiratory syndrome virus-induced pneumonia.J Clin Microbiol 37:620,.1999
10Thacker EL,]hacker BJ,Young Il;,et al:Effect of vaccination on the potentiation of porcine reproductive and respiratory syndrome virus (PRRSV)-induced pneumonia by Mycoplasma hyopneumoniae.Vaccine 18:1244,2000
7DOMINIEK. Interaction of M. hyopneumoniae with other pathogen [ J ]. Pig Progress,2005,21 ( 6 ) : 18-20.
8MARIA C, CARLOS P, ALICIA T. Application of a nested polymerase chain reaction assay to detect Mycoplasma hyopneumoniae from nasal swabs [ J ]. Vet Diagn Invest, 1999,11:246-251.
9VERDIN E, KOBISCH M, BOVE J M, et al. Use of an internal control in a nested-PCR assay for Mycoplasma hyopneumoniae detection and quantification in traeheobronehiolar washings from pigs [ J ]. Molecular and Cellular Probes,2000,14:365-372.
10VERDIN E, SAILLARD C, LABBE A, et al. A nested PCR assay for the detection of Mycoplasma hyopneumoniae in tracheobronchiolar washings from pigs [ J ]. Veterinary Microbiology, 2000,76 : 31 - 40.