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The impact of malaria parasitism: from corpuscles to communities
Thomas E. Wellems, Karen Hayton, Rick M. Fairhurst
Thomas E. Wellems, Karen Hayton, Rick M. Fairhurst
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The impact of malaria parasitism: from corpuscles to communities

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Abstract

Malaria continues to exert a tremendous health burden on human populations, reflecting astonishingly successful adaptations of the causative Plasmodium parasites. We discuss here how this burden has driven the natural selection of numerous polymorphisms in the genes encoding hemoglobin and other erythrocyte proteins and some effectors of immunity. Plasmodium falciparum, the most deadly parasite species in humans, displays a vigorous system of antigen variation to counter host defenses and families of functionally redundant ligands to invade human cells. Advances in genetics and genomics are providing fresh insights into the nature of these evolutionary adaptations, processes of parasite transmission and infection, and the difficult challenges of malaria control.

Authors

Thomas E. Wellems, Karen Hayton, Rick M. Fairhurst

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Figure 5

Chloroquine-resistant P. falciparum spread from at least six known origins.

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Chloroquine-resistant P. falciparum spread from at least six known origi...
Chloroquine resistance entered Africa in the late 1970s, having originated in Southeast Asia. PfCRT molecules from the individual foci all contain a key K76T amino-acid replacement but are distinguished by different patterns of accompanying codon polymorphisms and chromosome haplotype polymorphisms. In addition to five foci previously depicted (109), the map indicates recently described parasites in India and Iran that probably spread from an additional focus of chloroquine resistance (122, 123). Figure reproduced with permission from ASM Press (109).

Copyright © 2026 American Society for Clinical Investigation
ISSN: 0021-9738 (print), 1558-8238 (online)

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