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. 2021 Jul;27(7):1902–1908. doi: 10.3201/eid2707.203230

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Prevalence of Plasmodium falciparum kelch 13 mutations in pretreatment therapeutic efficacy study samples, 9 countries in Africa, 2014–2018. A total of 11 unique nonsynonymous and 27 unique synonymous mutations were detected in 2,865 successfully sequenced pretreatment and day of failure samples from Angola, Benin, Democratic Republic of the Congo, Guinea, Kenya, Malawi, Mali, Tanzania, and Zambia collected during 2014–2018. A total of 2,753 samples were wild-type. Data from Angola includes results from 2 therapeutic efficacy studies.