Microbiology Most important serotype of E coli causing hemolytic uremic syndrome – A O 157: H7 of EHEC B O 107 :H7of EIEC C O 157: H7 of ETEC D O 109: H7 of EAEC π‘ Explanation Most important serotype of E coli causing hemolytic uremic syndrome - β Correct Answer: A. O 157: H7 of EHEC