Acute intravascular hemolysis can be caused by infection due to all of the following organisms except-

Organisms that parasitize RBCs can directly lyse them and can cause intravascular hemolysis. Intracellular parasites; reside within RBCs: Plasmodium spp., Babesia spp., Bartonella baciliformis Clostridium tetani is not intracellular parasite; it can cause hemolysis indirectly by production of tetanolysin toxin, but it not intravascular hemolysis.