This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Spleen, Subject name: Surgery
Most common infections after splenectomy are: 
Select and explain. 
A. Uncapsulated bacteria, B. Capsulated bacteria, C. Gram-positive sepsis, D. Gram-negative bacteria
B: Capsulated bacteria
Answer: B: Capsulated bacteria 
Explanation: Overwhelming post splenectomy infection MC late(after 2-5 years) fatal complication of splenectomy After splenectomy, ability to filter and phagocytose bacteria, paicularly encapsulated bacteria (Streptococcus pneumonia, Hemophilus influenza, Neisseria meningitides) and parasitized blood cells is lost. MC infection after splenectomy : Streptococcus pneumonia (50-90% cases) Neisseria meningitidis (Meningococcus) H. influenza type B Prevention- By vaccination Best time for vaccination 2 weeks before elective splenectomy * As early as possible after emergency splenectomy