Show Notes
Mousa A et al., Nature Communications - Pooled analysis of seven therapeutic efficacy trials (1639 participants, 12 African sites) quantifies how dhps resistance genotypes shorten the duration of protection from sulfadoxine-pyrimethamine (SP) and maps predicted chemoprevention impact across Africa. Key terms: sulfadoxine-pyrimethamine, dhps mutations, chemoprevention, malaria, genomic surveillance.
Study Highlights:
The authors pooled individual-level data from seven trials (1639 participants) and used a Bayesian multi-strain Weibull survival model to estimate genotype-specific durations of SP protection while accounting for site-level transmission. Mean protection against sulfadoxine-susceptible dhps AKA parasites was longest (≈55.7 days), intermediate for dhps GKA (≈33.9 days), and substantially shorter for dhps GEA (≈10.7 days) and dhps GEG (≈11.7 days). SP combined with amodiaquine (SPAQ) showed markedly longer protection against GEA in the available data (≈42.5 days). The study produced maps and a web tool to predict local SP protective efficacy using genomic surveillance inputs.
Conclusion:
dhps resistance mutations substantially reduce the duration of SP post-treatment protection; integrating genotype surveillance into policy can guide where SP-based chemoprevention is likely to remain effective and where alternatives such as SPAQ should be considered.
QC:
This episode was checked against the original article PDF and publication metadata.
Scope: article metadata and core scientific claims from the narration, excluding analogies, intro/outro, and music.
Factual QC score: 10/10.
Metadata QC score: 10/10.
Supported core claims: 6.
Claims flagged for review: 0.
Metadata checks passed: 4.
Metadata issues found: 0.
QC result: Pass.
Music:
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Article title:
Impact of dhps mutations on sulfadoxine-pyrimethamine protective efficacy and implications for malaria chemoprevention
First author:
Mousa A
Journal:
Nature Communications
DOI:
10.1038/s41467-025-58326-z
Reference:
Mousa A. et al., Impact of dhps mutations on sulfadoxine-pyrimethamine protective efficacy and implications for malaria chemoprevention. Nature Communications (2025). doi:10.1038/s41467-025-58326-z
License:
Creative Commons Attribution 4.0 International (CC BY 4.0)
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