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Appl Environ Microbiol. 1986 December; 52(6): 1253-1257

Specificity and cross-reactivity of staphylococcal enterotoxin A monoclonal antibodies with enterotoxins B, C1, D, and E.

ABSTRACT

The cross-reactivity of monoclonal antibodies produced against staphylococcal enterotoxin A with purified and crude enterotoxins B, C1, D, and E and the specificity of such reactions were evaluated by the indirect enzyme-linked immunosorbent assay and immunoblotting of Western blots (from sodium dodecyl sulfate-polyacrylamide gel electrophoresis) followed by autoradiography. Purified and crude enterotoxins B were also tested with polyclonal antibodies. Specificity of reactivity was demonstrated by immunoblotting of crude enterotoxin A, crude enterotoxin A treated with trypsin, crude enterotoxin E, and also with crude A, B, C1, and D that were pretreated with Sepharose-4B-linked normal rabbit immunoglobulin G to remove protein A. A band corresponding to each staphylococcal enterotoxin was seen with monoclonal antibodies under all conditions tested and also with crude and purified enterotoxin B with two different (rabbit and goat) polyclonal antisera.

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