This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.V.S., Subject name: Pediatrics
[{'content': 'Children with Thalassemia and Iron overload are at an increased risk for infection with: \nSelect and explain. \nA. Yersinia Enterocolitica, B. Campylobacter jejuni, C. Escherichia coli, D. Vibrio cholera', 'role': 'user'}, {'content': "Answer: A \nExplanation: a. Yersinia enterocolitica(Ref: Nelson's 20/e p 2325)Iron therapy may increase the virulence of malaria and certain, gram-negative bacteria, particularly in developing countries.Iron overload is associated with Yersinia infection.", 'role': 'assistant'}]