Detection of Genes Encoding Cholera Toxin (CT), Zonula Occludens Toxin (ZOT), Accessory Cholera Enterotoxin (ACE) and Heat-Stable Enterotoxin (ST) inVibrio mimicusClinical Strains

Gene encoding zonula occludens toxin (zot) does not occur independently from cholera enterotoxin genes (ctx) in Vibrio cholerae.

Of 167 Vibrio cholerae isolates screened for sequences homologous with zonula occludens toxin (zot) or cholera toxin (ctx) genes, 3.0% of non-O1, 100.0% of clinical O1, and 0.0% of environmental O1 strains contained both zot and ctx. zot was present only in strains that were ctx positive; all ctx-positive strains carried zot. The absence of zot-positive, ctx-negative strains suggests ZOT is not...

Vibrio cholerae for heat-labile enterotoxin and cholera toxin

Molecular Detection of Zonula Occludens Toxin (zot) Genes in Vibrio Cholerae O1 using PCR

Background: Zot (Zonula occludens toxin) is one of the secretion toxins of Vibrio cholerae in small intestine that binds to certain receptors in the epithelial cells and causes a change in the structure of tight junction. The purpose of this research is rapid detection of zot enterotoxin gene using PCR. Materials and Methods: The genomic DNA was extracted by DNA isolation kit and gene amplific...

Accessory cholera enterotoxin (Ace), the third toxin of a Vibrio cholerae virulence cassette.

Vibrio cholerae causes the potentially lethal disease cholera through the elaboration of the intestinal secretogen cholera toxin. A second toxin of V. cholerae, Zot, decreases intestinal tissue resistance by modifying intercellular tight junctions. In this report, a third toxin of V. cholerae, Ace (accessory cholera enterotoxin), is described. Ace increases short-circuit current in Ussing chamb...

Differential biological and adjuvant activities of cholera toxin and Escherichia coli heat-labile enterotoxin hybrids.

Two bacterial products that have been demonstrated to function as mucosal adjuvants are cholera toxin (CT), produced by various strains of Vibrio cholerae, and the heat-labile enterotoxin (LT) produced by some enterotoxigenic strains of Escherichia coli. Although LT and CT have many features in common, they are clearly distinct molecules with biochemical and immunologic differences which make t...