1) Cytotoxin 
An enterotoxin (not to be confused with endotoxin) is a protein exotoxin released by a microorganism that targets the intestines. Its target site is indicated within its name. {Clarify|date=June 2010} Enterotoxins are chromosomally encoded exotoxins that are produced and secreted from several bacterial organisms. They are often heat-stable, and ar...
(from the article `cholera`) ...the bacterium`s cell wall. The only strains of V. cholerae known to cause cholera—strains O1 and O139—have the ability to produce a type of toxin ...
<microbiology> Group of bacterial exotoxins produced by enterobacteria and that act on the intestinal mucosa. By perturbing ion and water transport systems they induce diarrhoea. Cholera toxin is the best known example. ... (13 Oct 1997) ... 
(en´tәr-o-tok″sin) a toxin specifically affecting cells of the intestinal mucosa, causing vomiting and diarrhea, such as those elaborated by species of Bacillus, Clostridium, Escherichia, Staphylococcus, and Vibrio.
A toxin affecting the intestine.
Type: Term Pronunciation: en′tĕr-ō-tok′sin Definitions: 1. A cytotoxin specific for the cells of the intestinal mucosa.
toxin that affects the intestines
noun a cytotoxin specific for the cells of the intestinal mucosa
a toxic substance produced by certain bacteria that on ingestion causes violent vomiting and diarrhea.