Abstract
Hybridomas producing monoclonal antibodies against type A Hall strain Clostridium botulinum toxin were generated by fusing mouse myeloma cell line P3-X63-Ag8.653 with spleen cells of Balb/c mice immunized with C. botulinum type A toxoid. The monoclonal antibody from one hybridoma, identified as No. 424, was selected from 61 others for its high antibody titre. This monoclonal antibody was used in a double-sandwich enzyme-linked immunosorbent assay (ELISA) system to detect type A toxin in culture fluids and in foods. The monoclonal antibody did not react with either C. botulinum toxin types B, C, D, E and F or with other clostridial species tested. This particular monoclonal antibody (No. 424) did not neutralize type A toxin in the mouse bioassay procedure but detected ~ 10 mouse lethal doses of type A toxin/ml culture fluid. Monoclonal antibody and rabbit antitoxin to type A C. botulinum toxin were useful in a double-sandwich ELISA for the rapid and specific detection of type A toxic fluids in culture and in food samples.
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