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• W2111658433 abstract "In 2002, the World Health Organization recommended that artemisinin-based combination therapy (ACT) be used to treat uncomplicated malaria. Dihydroartemisinin-piperaquine and artesunate-pyronaridine are two of these new combinations. The aim of the present work was to assess the distribution of the in vitro values of pyronaridine (PND) and piperaquine (PPQ) and to define a cut-off for reduced susceptibility for the two anti-malarial drugs. The distribution and range of the 50% inhibitory concentration values (IC50) of PND and PPQ were determined for 313 isolates obtained between 2008 and 2012 from patients hospitalized in France for imported malaria. The statistical Bayesian analysis was designed to answer the specific question of whether Plasmodium falciparum has different phenotypes of susceptibility to PND and PPQ. The PND IC50 values ranged from 0.6 to 84.6 nM, with a geometric mean of 21.1 ± 16.0 nM (standard deviation). These values were classified into three components. The PPQ IC50 values ranged from 9.8 to 217.3 nM, and the geometric mean was 58.0 ± 34.5 nM. All 313 PPQ values were classified into four components. Isolates with IC50 values greater than 60 nM or four-fold greater than 3D7 IC50 are considered isolates that have reduced susceptibility to PND and those with IC50 values greater than 135 nM or 2.3-fold greater than 3D7 IC50 are considered isolates that have reduced susceptibility to PPQ. The existence of at least three phenotypes for PND and four phenotypes for PPQ was demonstrated. Based on the cut-off values, 18 isolates (5.8%) and 13 isolates (4.2%) demonstrated reduced susceptibility to PND and PPQ, respectively." @default.
• W2111658433 created "2016-06-24" @default.
• W2111658433 creator A5027759497 @default.
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• W2111658433 date "2015-02-05" @default.
• W2111658433 modified "2023-10-15" @default.
• W2111658433 title "Multinormal in vitro distribution of Plasmodium falciparum susceptibility to piperaquine and pyronaridine" @default.
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• W2111658433 doi "https://doi.org/10.1186/s12936-015-0586-6" @default.
• W2111658433 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/4323025" @default.
• W2111658433 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/25848972" @default.
• W2111658433 hasPublicationYear "2015" @default.
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