A 20 year old man presented with hemorrhagic colitis. The stool sample grew Escherichia coli in pure culture. The following serotype of E.coli is likely to be causative agent -
Ans. is 'a' i.e., 0 157 : H7 . Amongst E. coli, Enterohemorrhagic E. coli causes heamorrhagic colitis and the typical EHEC is serotype 0157: H7. Remember . Few other serotype such as 026 : Hl also belongs to this category.
0157:H7
0 159:H7
0107:H7
0 55:H7