This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Microbiology
After splenectomy, the most common infection: 
Select and explain. 
A. Pneumococci, B. E. coli, C. Klebsiella, D. Streptococcus
A: Pneumococci
Answer: A: Pneumococci 
Explanation: Splenectomy increases the risk of following infections:

Bacterial:
Pneumococcal
H. influenzae
Some Gram -ve enteric organism
Parasitic – Babesia
Viral – No ↑ in risk of viral infection