1.

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 the causative agent:

A. O 107:H7
B. O 55:H7
C. O 157:H7
D. O 159:H7
Answer» D. O 159:H7


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