Transmission-blocking Effects of Primaquine and Methylene Blue Suggest Plasmodium falciparum Gametocyte Sterilization Rather Than Effects on Sex Ratio

Clin Infect Dis. 2019 Sep 27;69(8):1436-1439. doi: 10.1093/cid/ciz134.

Abstract

Gametocyte density and sex ratio can predict the proportion of mosquitoes that will become infected after feeding on blood of patients receiving nongametocytocidal drugs. Because primaquine and methylene blue sterilize gametocytes before affecting their density and sex ratio, mosquito feeding experiments are required to demonstrate their early transmission-blocking effects.

Keywords: anopheles; infectiousness; malaria; transmission; treatment.

Publication types

  • Randomized Controlled Trial
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adolescent
  • Adult
  • Animals
  • Antimalarials / pharmacology*
  • Child
  • Child, Preschool
  • Culicidae / parasitology
  • Culicidae / physiology*
  • Female
  • Humans
  • Malaria, Falciparum / parasitology
  • Malaria, Falciparum / prevention & control*
  • Male
  • Mali
  • Methylene Blue / pharmacology*
  • Middle Aged
  • Plasmodium falciparum / drug effects*
  • Primaquine / pharmacology*
  • Sex Ratio
  • Sterilization
  • Young Adult

Substances

  • Antimalarials
  • Primaquine
  • Methylene Blue