<prompt> Life threatening intravascular hemolysis occur with sepsis due to which organism?Clostridium perfringensMycoplasma pneumoniaPseudomonasKlebsiella  <response>: Clostridium perfringens sepsis leads to life threatening intravascular hemolysis due to lecithinase activity. It occurs following open wounds, septic aboion, or due to a contaminated blood unit. Other infections causing hemolytic anemia: Malaria Shiga toxin-producing E. coli O157:H7 