<prompt> Which is the commonest Post splenectomy infection?Streptococcus pyogenesStaphylococcus aureusStreptococcus PneumoniaePseudomonas aeruginosa  <response>: Ans is c ie. Streptococcus Streptococcus pneumoniae is the most common inf. in post splenectomy patient. Schwaz 9e writes -The most common causal organism, accounting for as many as 50 to 90 of all OPSI cases, remains pneumococcus. Meningococcus, H. influenzae type B, and group A streptococci follow in order of frequency. 