Acute intravascular hemolysis can be caused by infection due to all of the following organisms except-: (A) Clostridium tetani, (B) Bartonella bacilliformis, (C) Plasmodium falciparum, (D) Babesia microti
Answer is A. 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.