5Bienenstock J, Befus A D. Mucosal immunology. Immunology, 1980,41(2) :249-271.
6McGhee J R,Jiri Mestecky, Mark, et al. The mueosal immune system: from fundamental concepts to vaccine development. Vack cine,1992, 10(2): 75-88.
7Salmon H. Mammary gland immunology and neonate protection in pigs. Homing of lymphocytes into the MG. Adv Exp Med Biol, 2000,480:279-286.
8Naotoshi Tsuji, Kayo Suzuki, Harue Kasug-Aoki, et al. Mice intranasally immunized with a recombinant 16-kilodalton antigen from roundworm ascaris parasites are protected against larval migration of ascaris suum. Infect Immun, 2003,71(9): 5314-5323.
