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We studied with a mouse model and in piglets the requirements to prime for a secondary, mucosal B-cell response against Escherichia coli F4 fimbriae, an important virulence factor of enterotoxigenic E. coli, the agent associated with postweaning diarrhoea in piglets. The major observation obtained with the mouse model was verified for piglets. Mice and piglets were primed orally or parenterally...
Double antibody sandwich enzyme-linked immunosorbent assays (DAS-ELISA) have been developed for the assessment of IgM, IgG and IgA concentrations in porcine serum. Isotype-specific monoclonal antibodies (mAb) were used for coating and detection. The DAS-ELISAs were examined for their ability to detect each isotype and for the assay variations. A computer programme was used to verify the parallelism...
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