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Assessing emergence risk of double-resistant and triple-resistant genotypes of Plasmodium falciparum

Author

Listed:
  • Eric Zhewen Li

    (Pennsylvania State University)

  • Tran Dang Nguyen

    (Pennsylvania State University)

  • Thu Nguyen-Anh Tran

    (Pennsylvania State University)

  • Robert J. Zupko

    (Pennsylvania State University)

  • Maciej F. Boni

    (Pennsylvania State University
    University of Oxford)

Abstract

Delaying and slowing antimalarial drug resistance evolution is a priority for malaria-endemic countries. Until novel therapies become available, the mainstay of antimalarial treatment will continue to be artemisinin-based combination therapy (ACT). Deployment of different ACTs can be optimized to minimize evolutionary pressure for drug resistance by deploying them as a set of co-equal multiple first-line therapies (MFT) rather than rotating therapies in and out of use. Here, we consider one potential detriment of MFT policies, namely, that the simultaneous deployment of multiple ACTs could drive the evolution of different resistance alleles concurrently and that these resistance alleles could then be brought together by recombination into double-resistant or triple-resistant parasites. Using an individual-based model, we compare MFT and cycling policies in malaria transmission settings ranging from 0.1% to 50% prevalence. We define a total risk measure for multi-drug resistance (MDR) by summing the area under the genotype-frequency curves (AUC) of double- and triple-resistant genotypes. When prevalence ≥ 1%, total MDR risk ranges from statistically similar to 80% lower under MFT policies than under cycling policies, irrespective of whether resistance is imported or emerges de novo. At 0.1% prevalence, there is little statistical difference in MDR risk between MFT and cycling.

Suggested Citation

  • Eric Zhewen Li & Tran Dang Nguyen & Thu Nguyen-Anh Tran & Robert J. Zupko & Maciej F. Boni, 2024. "Assessing emergence risk of double-resistant and triple-resistant genotypes of Plasmodium falciparum," Nature Communications, Nature, vol. 15(1), pages 1-12, December.
    • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-45547-x
    DOI: 10.1038/s41467-024-45547-x
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    1. Leila S. Ross & Satish K. Dhingra & Sachel Mok & Tomas Yeo & Kathryn J. Wicht & Krittikorn Kümpornsin & Shannon Takala-Harrison & Benoit Witkowski & Rick M. Fairhurst & Frederic Ariey & Didier Menard , 2018. "Emerging Southeast Asian PfCRT mutations confer Plasmodium falciparum resistance to the first-line antimalarial piperaquine," Nature Communications, Nature, vol. 9(1), pages 1-13, December.
    2. Frédéric Ariey & Benoit Witkowski & Chanaki Amaratunga & Johann Beghain & Anne-Claire Langlois & Nimol Khim & Saorin Kim & Valentine Duru & Christiane Bouchier & Laurence Ma & Pharath Lim & Rithea Lea, 2014. "A molecular marker of artemisinin-resistant Plasmodium falciparum malaria," Nature, Nature, vol. 505(7481), pages 50-55, January.
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