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Infect Immun. 1985 October; 50(1): 190-198

Evaluation of Bordetella bronchiseptica vaccines in specific-pathogen-free piglets with bacterial cell surface antigens in enzyme-linked immunosorbent assay.

P Novotny, M Kobisch, K Cownley, A P Chubb and J A Montaraz

ABSTRACT

The progenies of specific-pathogen-free sows which had been immunized with Bordetella bronchiseptica vaccines of various origin before parturition were challenged intranasally with B. bronchiseptica within 5 days of birth. Sera of piglets were taken weekly and investigated by enzyme-linked immunosorbent assay against a mixture of B. bronchiseptica cell surface antigens containing curled fibers and fimbriae, lipopolysaccharide, and a mixture of proteins mostly derived from the outer membrane. The serological response to this antigenic mixture was paradoxical; the highest titers were obtained with the least effective vaccines. Antibodies which did relate to protection were oriented against the outer-membrane-derived proteins, one of which, of 68,000 molecular weight, appeared to be particularly important for two reasons. First, its concentration within the antigenic mixture was dependent upon cultural conditions; of all the proteins present in virulent strains, it was the first to disappear upon modulation. Second, it was absent from a strain which was unable to induce atrophic rhinitis in specific-pathogen-free piglets. Although all vaccines tested had some beneficial effect on the various clinical manifestations of the disease, only two vaccines were effective (P less than 0.001) in the prevention of nasal pathological changes. These two vaccines also stimulated the highest titers against the 68,000-molecular-weight protein. A mouse protection test utilizing a lethal intraperitoneal challenge failed to monitor the efficacy of vaccines for protection against atrophic rhinitis.


Infect Immun. 1985 October; 50(1): 190-198




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