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J Clin Microbiol. 1990 October; 28(10): 2175-2177

Recombinant fusion protein for simple detection of Escherichia coli heat-stable enterotoxin by GM1 enzyme-linked immunosorbent assay.

Center for Research on Infectious Diseases, National Public Health Institute, Cuernavaca, Morelos, Mexico.

ABSTRACT

A recombinant gene fusion protein composed of an Escherichia coli heat-stable enterotoxin (STa) peptide epitope fused to the amino end of the cholera toxin B subunit was used to detect STa produced by clinical isolates of enterotoxigenic E. coli (STa-ETEC) by a single monoclonal antibody-based inhibition GM1 enzyme-linked immunosorbent assay. In this test, 100% sensitivity and 100% specificity were observed for use of the recombinant protein in either its purified form or as crude Vibrio cholerae culture supernatants in detection of STa-ETEC.

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