Abstract
Twelve hybrids secreting antibody to the Sp serotype of infectious pancreatic necrosis virus (IPNV) were isolated from the fusion of murine myeloma cells and spleen cells from mice immunized with pelleted virus. All of the monoclonal antibodies possessed the kappa (K) light chain isotype. Nine contained the mu (M), two had the gamma 2a (G 2a), and one had the gamma 1 (G 1) heavy chain isotype. Using an enzyme-linked immunosorbent assay (ELISA), 10 antibodies were found to be broadly reactive against partially purified representatives of the three serotypes of IPNV, the Sp, Ab, and VR-299 strains. The other two antibodies reacted with the Sp serotype alone. Characterization by immunostaining of viral polypeptides electrophoretically transferred to nitrocellulose sheets was possible only with IgG type antibodies. One of the specific monoclonal antibodies was shown to be directed against the major capsid protein while the other specific monoclonal antibody and the broadly reacting one reacted with the low molecular weight viral polypeptides.
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