<prompt> Life-threatening intravascular hemolysis, due to a toxin with lecithinase activity, occurs with sepsis due to:PseudomonasBabesiaParvovirus B 19Clostridium perfringens  <response>: Life-threatening intravascular hemolysis, due to a toxin with lecithinase activity, occurs with Clostridium perfringens sepsis. Reference: Harrisons Principles of Internal Medicine, 18th Edition, Page 881 