Researchers led by the University of Oxford's Dominic Kwiatkowski identified three subpopulations of the malaria-causing parasite Plasmodium falciparum that appear to be resistant to artemisinin, as they report in Nature Genetics this week. Kwiatkowski and his team genotyped 86,158 coding SNPs in 825 parasite samples obtained from locations in Burkina Faso, Ghana, Mali, The Gambia, Cambodia Thailand, and Vietnam.

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