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Données récentes sur la sensibilité d'Anopheles arabiensis et d'Anopheles funestus aux pyréthrinoïdes et au DDT sur les Hautes Terres Centrales de Madagascar; résultats préliminaires montrant une absence de la mutation Kdr chez An. arabiensis

Abstract : The data indicate a decrease in the efficiency of α-cypermethrin 0.025% (Tkd99 = 21 mn) and of DDT 4% (Tkd99 = 191.5 mn) on An. arabiensis in Analamiranga. Neverthelesss, the effectiveness of permethrin 0.250% has been notified. In Soanierana, α-cypermethrin 0.025% was effective against An. arabiensis, whilst the ineffectiveness of the DDT 4% (Tkd99= 116 mn) in Andranonahoatra was observed. In Alasora, a fall in the effectiveness of α-cypermethrin 0.025% (Tkd99 = 21 mn) and the resistance to DDT 4% (Tkd99 = 6894 mn) was noted. No kdr mutation was detected on the kd gene of An. arabiensis resistant to the α-cypermethrin 0.025% and to DDT 4%, collected in Alasora. An. funestus collected in the district of Miandrivazo is susceptible to pyrethroids and to DDT. To conclude, in the Malagasy Central Highlands, An. arabiensis is ordinary sensitive to pyrethroid and poorly sensitive, or even resistant to DDT (as observed in Antananarivo plain). However, An. funestus remains sensitive to all tested insecticides; this observation is crucial because this anopheles vector is the first target of the campaigns of indoor spraying insecticides.
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https://hal.archives-ouvertes.fr/hal-03580849
Contributor : Gilbert Le Goff Connect in order to contact the contributor
Submitted on : Friday, February 25, 2022 - 3:24:38 PM
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Jocelyn Ratovonjato, Gilbert Le Goff, Edmond Rajaonarivelo, Emmanuel Rakotondraibe R, Vincent Robert. Données récentes sur la sensibilité d'Anopheles arabiensis et d'Anopheles funestus aux pyréthrinoïdes et au DDT sur les Hautes Terres Centrales de Madagascar; résultats préliminaires montrant une absence de la mutation Kdr chez An. arabiensis. Archives de l'Institut Pasteur de Madagascar, 2004, 69 (1 & 2), pp.63-69. ⟨hal-03580849⟩

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