This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Bacteriology, Subject name: Microbiology
All are true about enterohemorrhagic Escherichia coli Except 
Select and explain. 
A. Sereny test is positive, B. May cause diarrhoea, C. Can cause hemolytic uremic syndrome, D. Verocytotoxin is produced
A: Sereny test is positive
Answer: A: Sereny test is positive 
Explanation: The Sereny test is positive in Enteroinvasive E.coli. Enterohemorrhagic E.coli: produce verocytotoxin. It can give rise to diarrhoeal disease ranging from mild diarrhea to fatal hemorrhagic colitis and hemorrhagic uremic syndrome. Reference: Textbook of Microbiology; Anathanarayan and paniker's; 10th edition; Page no: 285