Soma D. D., Zogo B., Hien D. F. D., Hien A. S., Kabore D. A., Kientega M., Ouedraogo A. G., Pennetier Cédric, Koffi A. A., Moiroux Nicolas, Dabire R. K. (2021). Insecticide resistance status of malaria vectors Anopheles gambiae (s.l.) of southwest Burkina Faso and residual efficacy of indoor residual spraying with microencapsulated pirimiphos-methyl insecticide. Parasites and Vectors, 14 (1), 58 [9 p.]. ISSN 1756-3305.
Titre du document
Insecticide resistance status of malaria vectors Anopheles gambiae (s.l.) of southwest Burkina Faso and residual efficacy of indoor residual spraying with microencapsulated pirimiphos-methyl insecticide
Année de publication
2021
Auteurs
Soma D. D., Zogo B., Hien D. F. D., Hien A. S., Kabore D. A., Kientega M., Ouedraogo A. G., Pennetier Cédric, Koffi A. A., Moiroux Nicolas, Dabire R. K.
Source
Parasites and Vectors, 2021,
14 (1), 58 [9 p.] ISSN 1756-3305
BackgroundThe rapid spread of insecticide resistance in malaria vectors and the rebound in malaria cases observed recently in some endemic areas underscore the urgent need to evaluate and deploy new effective control interventions. A randomized control trial (RCT) was conducted with the aim to investigate the benefit of deploying complementary strategies, including indoor residual spraying (IRS) with pirimiphos-methyl in addition to long-lasting insecticidal nets (LLINs) in Diebougou, southwest Burkina Faso.MethodsWe measured the susceptibility of the Anopheles gambiae (s.l.) population from Diebougou to conventional insecticides. We further monitored the efficacy and residual activity of pirimiphos-methyl on both cement and mud walls using a laboratory susceptible strain (Kisumu) and the local An. gambiae (s.l.) population.ResultsAn. gambiae (s.l.) from Diebougou was resistant to DDT, pyrethroids (deltamethrin, permethrin and alphacypermethrin) and bendiocarb but showed susceptibility to organophosphates (pirimiphos-methyl and chlorpyrimiphos-methyl). A mixed-effect generalized linear model predicted that pirimiphos-methyl applied on cement or mud walls was effective for 210 days against the laboratory susceptible strain and 247 days against the local population. The residual efficacy of pirimiphos-methyl against the local population on walls made of mud was similar to that of cement (OR=0.792, [0.55-1.12], Tukey's test p-value=0.19).ConclusionsIf data on malaria transmission and malaria cases (as measured trough the RCT) are consistent with data on residual activity of pirimiphos-methyl regardless of the type of wall, one round of IRS with pirimiphos-methyl would have the potential to control malaria in a context of multi-resistant An. gambiae (s.l.) for at least 7 months.
Plan de classement
Sciences fondamentales / Techniques d'analyse et de recherche [020]
;
Entomologie médicale / Parasitologie / Virologie [052]
Description Géographique
BURKINA FASO
Localisation
Fonds IRD [F B010080648]
Identifiant IRD
fdi:010080648
