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Integrative and Comparative Biology 2002 42(2):401-407; doi:10.1093/icb/42.2.401
© 2002 by The Society for Integrative and Comparative Biology
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Coevolutionary Genetics of Plasmodium Malaria Parasites and Their Human Hosts1

Andrew G. Evans1 and Thomas E. Wellems2,1
1 Laboratory of Parasitic Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland 20892

Malaria has been invoked, perhaps more than any other infectious disease, as a force for the selection of human genetic polymorphisms. Evidence for genome-shaping interactions can be found in the geographic and ethnic distributions of the hemoglobins, blood group antigens, thalassemias, red cell membrane molecules, human lymphocyte antigen (HLA) classes, and cytokines. Human immune responses and genetic variations can correspondingly influence the structure and polymorphisms of Plasmodium populations, notably in genes that affect the success and virulence of infection. In Africa, where the burden from Plasmodium falciparum predominates, disease severity and manifestations vary in prevalence among human populations. The evolutionary history and spread of Plasmodium species inform our assessment of malaria as a selective force. Longstanding host-pathogen relationships, as well as recent changes in this dynamic, illustrate the selective pressures human and Plasmodium species place on one another. Investigations of malaria protection determinants and virulence factors that contribute to the complexity of the disease should advance our understanding of malaria pathogenesis.


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