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Study of the Influence of Larval Life on the Sensitivity of the Adult Stages of Anopheles gambiae s.l. to Deltamethrin in the North Cameroon Region

Author(s): Quantine Narcisse Mvondo, Josiane Désirée Etang, Herman Parfait Awono-Ambene, Cyrille Ndo, Michael Piameu, Ekoko Eyisap Wolfgang, Fondjio Etienne, Serge Hubert Zebaze Togouet

The present research aims to evaluate the influence of larval life on the sensitivity of the adult stages of Anopheles gambiae s.l. to deltamethrin in the North Cameroon Region. In fact, physico-chemical analyzes were carried out in the water of the breeding lodges and insecticide tests were carried out on two sub-populations of Anopheles gambiae s.l. Thus, specimens of Anopheles gambiae s.l previously reared in the water of their original roosts are more resistant than those reared in spring water, with an average difference of 18.65 ± 10.15% mortality in more impacted urban area; 10.99 ± 7.98% in semi-urban areas and 5.28 ± 5.78% in less impacted rural areas. The capacities of Anopheles have increased with the level of urbanization and suggest the impact of the environment through the quality of the water in the lodgings in increasing resistance to insecticides. These results constitute avenues allowing the implementation of well-coordinated anti-vector strategies.

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