title: GM1 ganglioside enzyme-linked immunosorbent assay for detection of heat-labile enterotoxin produced by human and porcine Escherichia coli strains.
abstract: Human and porcine enterotoxigenic strains of Escherichia coli were cultivated in tryptone-yeast extract medium or brain heart infusion broth and tested for production of heat-labile enterotoxin by the GM1 ganglioside enzyme-linked immunosorbent assay (GM1-ELISA) and the Y1 adrenal cell assay. When testing for enterotoxigenicity by the GM1-ELISA technique, homologous antisera for human and porcine heat-labile enterotoxins had to be used to detect enterotoxigenic strains of human and porcine origin, respectively. This observation indicates a serological difference between the heat-labile enterotoxins produced by human and porcine strains. Furthermore, brain heart infusion broth was found to have an inhibitory effect on detection of enterotoxin both in the GM1-ELISA and in a toxin-binding modification of the Y1 adrenal cell test, but not in the conventional adrenal cell assay.
mesh_terms: D000818:Animals; D003470:Culture Media; D004768:Enterotoxins / Q000032:analysis*; D004797:Enzyme-Linked Immunosorbent Assay / Q000379:methods*; D004926:Escherichia coli / Q000276:immunology / Q000472:pathogenicity*; D005677:G(M1) Ganglioside / Q000378:metabolism; D005732:Gangliosides; D006358:Hot Temperature; D006801:Humans; D007124:Immunoenzyme Techniques; D013552:Swine / Q000382:microbiology*
chemical_list: D003470:Culture Media; D004768:Enterotoxins; D005732:Gangliosides; D005677:G(M1) Ganglioside