This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Bacteriology, Subject name: Medicine
Which organism causes infection after splenectomy 
Select and explain. 
A. H. Influenza, B. Staph aureus, C. E.coli, D. Klebsiella
A: H. Influenza
Answer: A: H. Influenza 
Explanation: Ans. (a) H. InfluenzaRef : Harrison 19th ed. / 484f 652* Spleen protects from capsulated organisms and hence protects from infection from organisms like pneumococcus, meningococcus, hemophilus influenza.* Vaccination against these organisms must be done 4 weeks before planned splenectomy.