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An expression/secretion plasmid containing genes encoding the FimA, CP39, PtfA, ToxA and F1P2 antigens associated with porcine pneumonic pasteurellosis and progressive atrophic rhinitis (PAR) was constructed and harbored in an attenuated Salmonella Typhimurium, which was used as the vaccine candidate. The immune responses induced by this delivery strain were investigated in a murine model. Each antigen...
In this study, a comparative evaluation of a novel live vaccine candidate expressing enterotoxigenic Escherichia coli (ETEC) fimbriae and a commercial ETEC vaccine was carried out in suckling to weaned piglets. The E. coli K88ab, K88ac, K99, FasA and F41 fimbrial genes were individually inserted into an expression/secretion plasmid, pBP244. These plasmids were subsequently transfected into attenuated...
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