Microbiology General 16640d79 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 0 157 : H7 B 0 159 : H7 C 0 107 : H7 D 0 55 High-Yield Explanation Ans. is 'a' i.e., 0157 : 117