Which organism exerts its pathogenic effect by secretion of a potent………..

e) vibrio cholerae

It causes cholera by secreting a potent exotoxin known as cholera toxin. This toxin continuously stimulates adenyl cyclase activity in the mucosal cells of the intestine, leading to an increase in cyclic AMP (cAMP) levels. The elevated cAMP results in the secretion of large amounts of water and electrolytes into the intestinal lumen, causing the characteristic watery diarrhea associated with cholera