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Identification ofEscherichia coli heat-labile enterotoxin by means of a ganglioside immunosorbent assay (GM1-ELISA) procedure

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Abstract

A sensitive, quantitative method for determination ofEscherichia coli heat-labile enterotoxin (LT) is presented. The assay is based on the specific binding of LT to polystyrene-adsorbed GM1 ganglioside and subsequent enzyme immunological demonstration of the bound toxin. Enterotoxin titers determined with this GM1 enzyme-linked immunosorbent assay (ELISA) method agreed closely with those obtained with the adrenal cell bioassay. The GM1-ELISA procedure was capable of demonstrating LT in allE. coli overnight cultures that gave positive adrenal cell results. The simplicity and high reproducibility of the described method should make it well suited for routine laboratory diagnosis of LT enterotoxigenicE. coli strains.

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Authors and Affiliations

  1. Institute of Medical Microbiology, University of Göteborg, Guldhedsgatan 10, S-413 46, Göteborg, Sweden

    Ann-Mari Svennerholm & Jan Holmgren

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  1. Ann-Mari Svennerholm
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  2. Jan Holmgren
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Svennerholm, AM., Holmgren, J. Identification ofEscherichia coli heat-labile enterotoxin by means of a ganglioside immunosorbent assay (GM1-ELISA) procedure. Current Microbiology 1, 19–23 (1978). https://doi.org/10.1007/BF02601701

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