Malarial parasite 'Plasmodium' completes its life cycle in two hosts. Draw its complete life cycle and explain various stages it follows throughout its life.
Answers
Answer:
Stages :
(a) The stage in which the parasite enters in the body of humans through saliva of mosquito- sporozoite stage.
(b) Asexual reproduction of sporozoites in liver cells resulting into bursting of those cells and releasing outside into the blood.
(c) Sporozoites infect RBCs cause them to burst, with release of haemozoin, indicated by repeated cycles of fever. Released parasites also infect other RBCs.
(d) This is followed by sexual stage in RBCs. Gametocytes develop in the RBCs .
(e) Female mosquito takes up gametocytes with the blood of host. Fertilization and development takes place in the stomach and intestine of mosquito.
(f) From intestine parasite (sporozoites) reach the salivary glands for storage from where they reach the human body by the bite of the infected female Anopheles mosquito, and that is how the cycle continues.
The malaria parasite life cycle involves two hosts. During a blood meal, a malaria-infected female Anopheles mosquito inoculates sporozoites into the human host . Sporozoites infect liver cells and mature into schizonts , which rupture and release merozoites . .........
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