2BOURSNELL M E G, BROWN T D K, SKINNER M, et al. Completion of the sequence of the genome of the coronavirus avian infectious bronchitis virus [J]. J Gen Virol,1987, 68:57-77.
3LAI M M C. Coronavirus: organization, replication and expression of genome [ J ]. Annual Review of Microbiology,1990,40(3):304-333.
4IGNJATOVIC J, GALLI L. Immune responses to structural protein irffectious bronchitis virus [J]. Avian Pathology,1995, 24:313-332.
5KWON H M, JACKWOOD M W, GELB J. Differentiation of infectious bronchitis virus serotypes using polymerase chain reaction and restriction fragment length polymorphism analysis [J]. Avian Dis, 1991,35:216-220.
6BINNS M M, BOURSNELL M E C, CAVANAGH D. Israel journal of veterinary medicine [J]. Vaccine, 1986, 42(2) :124-127.
7SONG C S, LEE Y J, LEE C W. Induction of protective immunity in chickens vaccinated with irdeetious bronchitis virus S1 glyeoprotein expressed by a recombinant baculovirus [J]. J of General Virology, 1998,79:719-723.
8SANG H S, WAND L, SMITH R, et al. The carboxyl-terminall 20-residue polypetide of irtfeetious bronchitis virus nucleoeapsid inducees cytotoxic T lymphocytes and protects chickens from acute invection [J ]. J Virol, 1997,71 (10):7 889-7 894.
