Insecticide Resistance in Malaria Mosquitoes in Chad
Author Information
Author(s): Kerah-Hinzoumbé Clément, Péka Mallaye, Nwane Philippe, Donan-Gouni Issa, Etang Josiane, Samè-Ekobo Albert, Simard Frédéric
Primary Institution: Programme National de Lutte contre le Paludisme, N'Djaména, Tchad
Hypothesis
Is there insecticide resistance in Anopheles gambiae populations in Chad?
Conclusion
The study found variable levels of resistance to pyrethroid insecticides in Anopheles gambiae populations in Chad, with the L1014F kdr mutation detected in some specimens.
Supporting Evidence
- Full susceptibility to malathion was recorded in all samples.
- Reduced susceptibility to bendiocarb was found in one sample out of nine assayed.
- Increased tolerance to pyrethroids was detected in most samples.
- The L1014F mutation was found in 88.6% of surviving An. gambiae mosquitoes.
Takeaway
Scientists checked if mosquitoes that spread malaria in Chad are resistant to insecticides. They found some are resistant, which could make it harder to control malaria.
Methodology
The study assessed susceptibility to various insecticides using WHO standard procedures on wild Anopheles gambiae mosquitoes collected from different locations.
Limitations
The study may not represent all Anopheles populations in Chad due to limited sampling locations.
Participant Demographics
The study focused on Anopheles gambiae s.l. populations from three health districts in south-western Chad.
Digital Object Identifier (DOI)
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