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    • 3. 发明专利
    • VACCINE FOR INFECTIOUS SWINE OR BOVINE GASTROENTERITIS
    • JPH0267227A
    • 1990-03-07
    • JP21984588
    • 1988-09-02
    • GEN CORP KK
    • KODAMA YOSHIKATSU
    • A61K39/15A61K39/215A61P31/12
    • PURPOSE:To provide the subject vaccine produced by treating an inactivated or attenuated virus strain with a surfactant and capable of accomplishing effective milk immunization of newly born pigling or calf by inoculating to a pregnant animal before delivery. CONSTITUTION:Inactivated or attenuated virus of infectious swine or bovine gastroenteritis is treated with a surfactant, preferably a nonionic surfactant (e.g. polyoxyethylene sorbitan fatty acid ester surfactant) and the treated virus is used as the objective vaccine as it is or preferably as a mixture with an adjuvant. The concentration of the surfactant in the liquid in the above treatment is preferably >=0.01%, especially 0.5-5%. A neutral antibody against the virus is induced in the milk of the mother swine after delivery by the immunization of the pregnant swine with the vaccine before delivery. The lowering of the neutral antibody titer in the transfer from the colostrum to the normal milk is slow and the mild antibody value is maintained at a level comparable or superior to the level attained by the inoculation of strongly toxic strain. Effective milk immunization can be established by this process.