This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Microbiology
The mechanism of action of Enteropathogenic E.coli is - 
Select and explain. 
A. Adherance to enterocytes, B. Stimulates adenyl cyclase, C. Produces secretory diarrohea, D. None of the above
A: Adherance to enterocytes
Answer: A: Adherance to enterocytes 
Explanation: Ans. is 'a' i.e., Adherance to enterocytes . EPEC adheres to the mucosa of upper small intestine and causes disruption of the brush border microvilli. The name enteroadherent E. coli has been proposed for these strains, which can be indentified by their adhesion to HEP-2 cells.