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Life Cycle of Plasmodium - Practice Questions & MCQ

Edited By admin | Updated on Sep 18, 2023 18:34 AM | #NEET

Quick Facts

  • Life Cycle of Plasmodium is considered one of the most asked concept.

  • 13 Questions around this concept.

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Where will you look for the sporozoites of the malarial parasite?

Motile zygote of Plasmodium occurs in:

Concepts Covered - 1

Life Cycle of Plasmodium
  • Plasmodium enters the human body as sporozoites (infectious form) through the bite of infected female Anopheles mosquito. 
  • The parasites initially multiply within the liver cells and then attack the red blood cells (RBCs) resulting in their rupture. 
  • The rupture of RBCs is associated with the release of a toxic substance, hemozoin, which is responsible for the chill and high fever recurring every three to four days.
  • When a female Anopheles mosquito bites an infected person, these parasites enter the mosquito’s body and undergo further development. 
  • The parasites multiply within them to form sporozoites that are stored in their salivary glands. When these mosquitoes bite a human, the sporozoites are introduced into his/ her body, thereby initiating the events mentioned above. 
  • It is interesting to note that the malarial parasite requires two hosts – humans and mosquitoes – to complete its life cycle.
  • The female Anopheles mosquito is the vector (transmitting agent) too.

Human Species of Plasmodium & Types of Malaria

Plasmodium vivax:

  • It is most common in India.
  • Its incubation period is about 14 days.
  • It causes benign tertian malaria. 
  • Recurrence of fever occurs after every 48 hours.

Plasmodium falciparum:

  • It is responsible for severe infection in Africa and parts of tropics.
  • Its incubation period is about 14 days.
  • It causes malignant tertian malaria.

Plasmodium malariae:

  • It is common in tropical Africa, Burma, Sri Lanka, and parts of India.
  • It is the only species that can infect other primates as well.
  • Recurrence of fever is after every 72 hours.
  • It causes quartan malaria.

Plasmodium ovale:

  • This is the rarest of four species.
  • It is mostly found in tropical Africa.
  • It causes mild tertian malaria.

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Life Cycle of Plasmodium

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Books

Reference Books

Life Cycle of Plasmodium

Biology Textbook for Class XII

Page No. : 147

Line : 2

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