author(s)
Poumachu Yacouba, Ndo Cyrille, Fopa François, Antonio-Nkondjio Christophe, Awono-Ambene Herman Parfait, Njiokou Flobert and Tchuinkam Timoléon

abstract
Insecticide resistance threatens the success already achieved in reducing the burden of malaria through vector control. Understanding insecticide resistance mechanisms may help to develop novel strategies towards restoring the efficacy of insecticides. Here, we investigate existence of a potential association between the temperature sensitivity level and the insecticide resistance phenotype of an Anopheles arabiensis colony. The susceptibilities of thermosensitive and wild strains of An. arabiensis to usual insecticides were evaluated using the WHO standard resistance bioassay; then Odd-ratio analysis was performed to unveil an eventual association between phenotypic resistance and temperature level. Mortalities were significantly higher in the thermosensitive than wild strain to 0.75% Permethrin, 0.05% Deltamethrin and 0.1% Bendiocarb. The difference in susceptibility to 1% Fenitrothion, 4% and 0.4% Dieldrin was not significant, while thermosensitive and wild strains were both significantly susceptible to 4% DDT and 5% Malathion. Overall susceptibility of the thermosensitive strain to differents groups of insecticides compare to the wild strain suggest that temperature level is correlated with insecticides resistance phenotype as odd-ratio was > 1. These results stress a taking into account of the thermosensitivity of the main malaria vectors during insecticide resistance management and decision making policy