<prompt> Which organism causes infection after splenectomyH. InfluenzaStaph aureusE.coliKlebsiella  <response>: 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. 