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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...
Complementation Tests00:49

Complementation Tests

A complementation test is a simple cross to identify whether the two mutations are located on the same gene or different genes. It was first performed by Edward Lewis in the 1940s while working on fruit flies. He developed the test to identify the location and arrangement of different mutations on chromosomes.
Organisms heterozygous for different mutations are crossed pairwise in all combinations. If present on different genes, the mutations can complement each other by providing the missing...

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Related Experiment Video

Updated: Jun 19, 2026

High Yield Purification of Plasmodium falciparum Merozoites For Use in Opsonizing Antibody Assays
10:38

High Yield Purification of Plasmodium falciparum Merozoites For Use in Opsonizing Antibody Assays

Published on: July 17, 2014

THE COMPLEMENT FIXATION REACTION IN MONKEY MALARIA.

L T Coggeshall1, M D Eaton

  • 1Laboratories of the International Health Division, The Rockefeller Foundation, New York.

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

A new complement fixation test for Plasmodium knowlesi malaria in rhesus monkeys detects early and persistent antibodies. Antibody levels correlate with disease progression and parasitic relapses.

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Isolation and Analysis of Brain-sequestered Leukocytes from Plasmodium berghei ANKA-infected Mice
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Isolation and Analysis of Brain-sequestered Leukocytes from Plasmodium berghei ANKA-infected Mice

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Related Experiment Videos

Last Updated: Jun 19, 2026

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10:38

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Published on: July 17, 2014

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Isolation and Analysis of Brain-sequestered Leukocytes from Plasmodium berghei ANKA-infected Mice

Published on: January 2, 2013

Area of Science:

  • Immunology
  • Parasitology
  • Veterinary Medicine

Background:

  • Plasmodium knowlesi malaria poses a significant threat in Southeast Asia.
  • Accurate diagnostic tools are crucial for managing Plasmodium knowlesi infections.
  • Understanding the host immune response is key to developing effective treatments.

Purpose of the Study:

  • To develop and validate a specific complement fixation reaction test for Plasmodium knowlesi malaria.
  • To investigate the dynamics of complement-fixing antibodies during experimental Plasmodium knowlesi infection in rhesus monkeys.

Main Methods:

  • Detailed antigen preparation protocols for the complement fixation test.
  • Standardized procedures for conducting the complement fixation reaction test.
  • Monitoring of parasite counts and complement-fixing antibody titers in infected rhesus monkeys.

Main Results:

  • Specific complement-fixing antibodies were detected early and persisted throughout chronic Plasmodium knowlesi infection.
  • An initial drop in antibody titer followed the first appearance of complement-fixing antibodies.
  • A decrease in complement-fixing antibody titers preceded parasitic relapses in chronic infections.

Conclusions:

  • The developed complement fixation test is a valuable tool for diagnosing Plasmodium knowlesi malaria.
  • Complement-fixing antibody dynamics provide insights into the host-parasite relationship during infection.
  • Monitoring antibody titers may aid in predicting and managing parasitic relapses.