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Related Concept Videos

Malaria01:29

Malaria

Malaria pathogenesis in humans reflects a delicate interplay between parasite biology and host response. Clinical illness reflects a host’s immune response to the parasite’s asexual replication cycle, which is often asymptomatic in individuals with partial immunity. From the parasite's perspective, transmission between mosquito and human with minimal host pathology is evolutionarily advantageous. Among the six Plasmodium species infecting humans, P. falciparum and P. vivax dominate in global...
Symbiosis00:58

Symbiosis

Symbiotic relationships are long-term, close interactions between individuals of different species that affect the distribution and abundance of those species. When a relationship is beneficial to both species, this is called mutualism. When the relationship is beneficial to one species but neither beneficial nor harmful to the other species, this is called commensalism. When one organism is harmed to benefit another, the relationship is known as parasitism. These types of relationships often...

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In Vitro Assay of Plasmodium-Infected Red Blood Cell Killing by Cytotoxic Lymphocytes
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Published on: August 17, 2022

THE CULTIVATION OF MALARIAL PLASMODIA (PLASMODIUM VIVAX AND PLASMODIUM FALCIPARUM) IN VITRO.

C C Bass1, F M Johns

  • 1Laboratory of Tropical Medicine and Hygiene, Medical Department, Tulane University, New Orleans, Louisiana.

The Journal of Experimental Medicine
|October 30, 2009
PubMed
Summary
This summary is machine-generated.

This study successfully cultivated the asexual cycle of Plasmodium vivax and Plasmodium falciparum in vitro, confirming they are distinct species and develop exclusively within red blood cells.

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Area of Science:

  • Malariology
  • Parasitology
  • Cell Biology

Background:

  • The asexual life cycle of malaria parasites, Plasmodium vivax and Plasmodium falciparum, is crucial for disease pathogenesis.
  • Previous research suggested potential extracorpuscular development, requiring in vitro validation.

Purpose of the Study:

  • To establish and optimize in vitro cultivation of the asexual cycle of Plasmodium vivax and Plasmodium falciparum.
  • To investigate the developmental site and serum sensitivity of these malaria parasites.
  • To differentiate Plasmodium vivax and Plasmodium falciparum based on their in vitro growth characteristics.

Main Methods:

  • Cultivation of Plasmodium parasites in human blood, Locke's solution, and ascitic fluid.
  • Inclusion and exclusion of calcium chloride and ascitic fluid in culture media.
  • Removal of leucocytes and serial transplantation to fresh red blood cells and serum.
  • Observation of parasite morphology and developmental stages under varying conditions.

Main Results:

  • Successful in vitro cultivation of the asexual cycle of Plasmodium vivax and Plasmodium falciparum was achieved.
  • Parasites were exclusively observed within red blood cells, refuting extracorpuscular development.
  • Normal human serum rapidly destroyed the parasites in vitro.
  • Distinct morphological and developmental characteristics confirmed Plasmodium vivax and Plasmodium falciparum as separate species.
  • Generation periods varied (30 hours to 4 days) based on cultivation temperature, with sexual forms showing greater resilience.

Conclusions:

  • The asexual cycle of Plasmodium vivax and Plasmodium falciparum can be reliably cultivated in vitro.
  • Intraerythrocytic development is essential for these Plasmodium species.
  • Plasmodium vivax and Plasmodium falciparum are definitively distinct species.
  • Environmental factors like temperature significantly influence parasite development and generation time.