This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Bacteria, Subject name: Microbiology
[{'content': 'Verocytotoxin has been in individual suffering from hemolytic uraemic syndrome in their: \nSelect and explain. \nA. Blood, B. Tissues, C. Faeces, D. Saliva', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., BloodTypical (or infection-induced) HUS is most commonly associated with Escherichia coli with somatic (O) antigen 157 and flagella (H) antigen 7 - hence the designation O157:H7. It produces a toxin called Shiga toxin or verotoxin - hence, alternative names are Shiga toxin-producing E. coli (STEC) or verotoxin-producing E. coli (VTEC).", 'role': 'assistant'}]