2Thekisoe M O, Mbati P A, Bisschop S R. Different ap proaches to the vaccination of free ranging village chickens against Newcastle disease in Qwa-Qwa, South Africa [J]. Vet Microbio, 2004,101:23 - 30.
3X. Kong,Y. Hu,R. Rui,et al. Effects of Chinese herbal medicinal ingredients on peripheral lymphocyte prolif eration and serum antibody fiter after vaccination inchicke[J].International Immunopharmacology, 2004,4 (7):975 -982.
