Efficacy of Single-Dose Primaquine With Artemisinin Combination Therapy on Plasmodium falciparum Gametocytes and Transmission: An Individual Patient Meta-Analysis

Kasia Stepniewska, Georgina S. Humphreys, Bronner P. Gonçalves, Elaine Craig, Roly Gosling, Philippe J. Guerin, Ric N. Price, Karen I. Barnes, Jaishree Raman, Menno R. Smit, Umberto D'Alessandro, Will J.R. Stone, Anders Bjorkman, Aaron M. Samuels, Maria I. Arroyo-Arroyo, Guido J.H. Bastiaens, Joelle M. Brown, Alassane Dicko, Badria B. El-Sayed, Salah Eldin G. ElzakiAlice C. Eziefula, Simon Kariuki, Titus K. Kwambai, Amanda E. Maestre, Andreas Martensson, Dominic Mosha, Richard O. Mwaiswelo, Billy E. Ngasala, Joseph Okebe, Michelle E. Roh, Patrick Sawa, Alfred B. Tiono, Ingrid Chen, Chris J. Drakeley, Teun Bousema

Research output: Contribution to journalArticlepeer-review

32 Citations (Scopus)

Abstract

Background

Since the World Health Organization recommended single low-dose (0.25mg/kg) primaquine (PQ) in combination with artemisinin-based combination therapies (ACTs) in areas of low transmission or artemisinin-resistant P. falciparum, several single-site studies have been conducted to assess its efficacy.

Methods

An individual patient meta-analysis to assess the gametocytocidal and transmission-blocking efficacy of PQ used in combination with different ACTs was conducted. Random effects logistic regression was used to quantify PQ effect on (i) gametocyte carriage in the first two weeks post-treatment; (ii) the probability of infecting at least one mosquito or of a mosquito becoming infected.

Results

In 2,574 participants from fourteen studies, PQ reduced PCR-determined gametocyte carriage on days 7 and 14, most apparently in patients presenting with gametocytaemia on day 0 (Odds Ratio (OR)=0.22; 95%CI 0.17-0.28 and OR=0.12; 95%CI 0.08–0.16, respectively). The rate of decline in gametocyte carriage was faster when PQ was combined with artemether-lumefantrine (AL) compared to dihydroartemisinin-piperaquine (DP) (p=0.010 for day 7). Addition of 0.25mg/kg PQ was associated with near complete prevention of transmission to mosquitoes.

Conclusion

Primaquine’s transmission-blocking effects are achieved with 0.25 mg/kg PQ. Gametocyte persistence and infectivity are lower when PQ is combined with AL compared to DP.

Original languageEnglish
Pages (from-to)1215-1226
Number of pages12
JournalJournal of Infectious Diseases
Volume225
Issue number7
Early online date11 Aug 2020
DOIs
Publication statusPublished - 1 Apr 2022

Keywords

  • gametocytemia
  • Plasmodium falciparum
  • single low-dose primaquine

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