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. 1984 Sep;45(3):679–684. doi: 10.1128/iai.45.3.679-684.1984

Purification of enterotoxins from Vibrio mimicus that appear to be identical to cholera toxin.

W M Spira, P J Fedorka-Cray
PMCID: PMC263349  PMID: 6469354

Abstract

Cholera toxin-like (CT-like) enterotoxins produced by two strains of Vibrio mimicus, 61892 and 63616, isolated from diarrhea patients in Bangladesh, were purified, and their physicochemical, biological, and immunological properties were compared with those of CT produced by classical Vibrio cholerae 569B. The CT-like toxins were produced by lincomycin-resistant mutants grown in the presence of lincomycin at 200 micrograms/ml for strain 63616 and 250 micrograms/ml for strain 61892 and were purified by coprecipitation with hexametaphosphate followed by chromatography on phosphocellulose. The pure CT-like toxins were indistinguishable from 569B CT in sodium dodecyl sulfate-polyacrylamide gel electrophoresis, rabbit intestinal loop and Y-1 adrenal cell assays, antiserum neutralization and binding inhibition assays, and Ouchterlony immunodiffusion, except that the CT-like toxins appeared to consist almost entirely of A subunit which was proteolytically unnicked. Trypsin nicking, however, resulted in fragments that appeared to be identical to those of 569B CT. These results indicate that at least one species of Vibrio other than V. cholerae can produce enterotoxins which are virtually identical to CT.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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