3BaK H, Riising H J. Proteetion of vaccinated pigs against experimental infections with homologous and heterologous Haemophilus parasuis [J]. Vet Rec, 2002,151 (17): 502- 505.
4Wiegand M, Kielstin P, Pohle D, et al. Examination of primary SPF swine after experimental infection with Haemophilus parameters and in the parameters of the cerebrospinal fluid [J]. Tierarztl Prax, 1997,25(3) : 226-232.
5Vahle J L, Hayhes J S, Andrews J J. Experimental reproduction of Haemophius parasuis infection in swine : clinical, bacteriological, and morphological findings[J]. J Vet Diagn Invest, 1995,7(4) : 476-480.
6Solano G I, Segales J, Collins J E, et al. Porcine reproductive and respiratory syndrome virus ( PRRSV ) interaction with Haemophilus parasuis [J]. Vet Microbiol, 1997,55 (1-4):247-257.
7Narita M, Kawa shima K, Matsuura S, et al. Pneumonia in pigs infected with pseudorabies virus and Haenwphilus parasuis serorar4[J]. J Corup Pathol, 1994,110(4): 329-339.
8Solano G I,Bautista E, Molitor T W, et al. Effect of porcine reproductive and respiratory syndrome virus infection on the clearance of Haemophilus parasuis by porcine alveolar macrophages [J].Can J Vet Res,1998,62(4): 1251-256.
9Kielstein P,Rapp-Gabrielson V J. Designation of 15 serovars of Haemophilus parasuis on the basis of immunodiffusion using heatstable antigen extracts [J]. J Clin Microbiol, 1992, 30(4): 862-865.
10Rafiee M, Blackall P J. Establishment, validation and use of the kielstein-Rapp-Gabrielson serotyping scheme for Haemoghilus parasuis [J]. Aust Vet J, 2000,78(3):172-174.
