<prompt> Which is the commonest Post splenectomy infection :Streptococcus pyogenesStaphylococcus aureusStseptococcus PneumoniaPseudomonas aeruginosa  <response>: Ans is c ie. Streptococcus Streptococcus pneumoniae is the most common inf. in post splenectomy patient.Schwartz 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. Other organisms common in post splenectomy patients.Haemophilus influenzae type B Meningococcus Group A streptococci Group B streptococci Enterococcus species Bacteroides species Salmonella species Bartonella speciesCapnocytophaga canimorsus implicated in OP SI as a sequela of dog bitesBabesiaMalaria 