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  • Title: Immunoglobulin classes in serum antibody reactions in cattle following vaccination with Brucella abortus strain 19 and killed 45/20 vaccines.
    Author: Chung YS, Hall WT, Simmons GC.
    Journal: Aust Vet J; 1980 Sep; 56(9):413-6. PubMed ID: 6779787.
    Abstract:
    A group of 4 cows was vaccinated with Brucella abortus strain 19, followed 8 weeks later by a single dose of B. abortus 45/20 vaccine. A similar group received 2 doses of B. abortus 45/20 vaccine 8 weeks apart. The antibody responses of the groups were compared by testing whole serums and separated IgM and IgG fractions by the Rose Bengal Plate (RBP) agglutination and the complement fixation tests (CFT) using rough and smooth B. abortus antigens. Animals that had received B. abortus strain 19 responded to the 45/20 vaccine with increased titres to the smooth antigen. These relevant antibodies were predominantly of the IgG class. Standard CFT and RBP test antibodies could be detected in IgM and IgG fractions after the primary inoculation with B. abortus strain 19 vaccine.
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