Which disease is transmitted by all components or blood?-

MALARIA Malaria is a protozoal disease caused by any one or combination of four species of plasmodia: Plasmodium vivax, Plasmodium falciparum, Plasmodium ovale and Plasmodiummalariae. While Plasmodium falciparum causes malignant malaria, the other three species produce a benign form of illness. These parasites are transmitted by the bite of female Anopheles mosquito. The life cycle of plasmodia is complex i) It does not have an exo-erythrocytic stage. ii) Erythrocytes of any age are parasitised while other plasmodia parasitise juvenile red cells. iii) One red cell may contain more than one parasite. iv) The parasitised red cells are sticky causing obstruction of small blood vessels by thrombi, a feature which is responsible for extraordinary virulence of P. falciparum. The main clinical features of malaria are cyclic peaks of high fever accompanied by chills, anaemia and splenomegaly. Ref: TEXTBOOK OF PATHOLOGY 6th EDITION - HARSH MOHAN PAGE NO:188-190