<prompt> Life threatening intravascular hemolysis occurs with sepsis due to which organism:Clostridium perfringensMycoplasma pneumoniaPseudomonaKlebsiella  <response>: Life threatening intravascular hemolysis occur due to a toxin with lecithinase activity seen in clostridium perfringens sepsis. Ref: Harrisons principles of internal medicine, 18th edition ; Page :881. 