4Maurer R, Stettler P, Ruggli N, et al. Oronasal vaecination with classical swine fever virus (CSFV) replicon particles with either partial or complete deletion of the E2 gene induces partial protection against lethal challenge with highly virulent CSFV [.l ]. Vaccine, 2005, 23 (25): 3318-3328.
5Cavanagh D. Nidoviralses: a new order comprising Coronaviridae and Arteriviridae [J]. Arch Virol, 1997, 142 (3): 629-633.
6Epperson B, Holler L. An abortion storm and sow mortality syndrome [C]. Proc 28th Annu Meet Am Assoe Swine Pract, 1997: 479-484.
7Li H, Yang HC. Infection of porcine reproductive and respiratory syndrome virus suppresses the antibody response to classical swine fever virus vaccination [J]. Vet Microbiol, 2003, 95(4): 295-301.