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
Children with Thalassemia and Iron overload are at an increased risk for infection with: 
Select and explain. 
A. Yersinia Enterocolitica, B. Campylobacter jejuni, C. Escherichia coli, D. Vibrio cholera
A: Yersinia Enterocolitica
Answer: A: Yersinia Enterocolitica 
Explanation: 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.