<prompt> Black water fever is caused byKalaazarP.falciparumP.VivaxLeishmaniasis  <response>: Ans. b Plasmodium falciparum. Ref. Harrison, Principle of Medicine, 18th ed.Chapter 210. MalariaBlack water fever is caused by Plasmodium falciparum. Bloody urine hemoglobinuria occurs as a complication of falciparum malaria infection. It results from destraction of RBCs release of hemoglobin. It occurs most commonly in patients who have been treated with drugs derived from gunine. It is characterized by high fever, dark urine, epigastric pain, vomits, jaundice shock. Hepatosplenomegaly occurs. Severe anemia is the hallmark renal failure can ocur. 