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Table 5 Distribution of Kdr genotypes in An. gambiae populations from Douala and Yaoundé according to the category of breeding habitat and level of susceptibility to insecticides

From: Anopheles gambiae distribution and insecticide resistance in the cities of Douala and Yaoundé (Cameroon): influence of urban agriculture and pollution

Parameters Douala   Yaoundé   All
RR RS SS F(Kdr) P(HW) RR RS SS F(Kdr) P(HW) N F (Kdr)
Breeding sites             
   Polluted 35 44 22 0.56 0.31 10 36 39 0.33 0.81 186 0.45
   Non polluted 101 95 33 0.65 0.26 50 85 73 0.44 0.01 437 0.55
   Cultivated 92 31 7 0.83 0.06 19 5 2 0.83 0.13 156 0.83
Insecticides             
DDT 4%             
   Deaths 2 7 6 0.37 - 2 5 30 0.12 - 52 0.19
   Survivors 27 29 8 0.65 - 9 23 8 0.51 - 104 0.59
Permethrin 0.75%             
   Deaths 48 68 24 0.58 - 2 25 23 0.29 - 190 0.51
   Survivors 85 16 4 0.88 - 17 10 4 0.71 - 136 0.84
Deltamethrin 0.05%             
   Deaths 37 34 13 0.64 - 29 30 18 0.57 - 161 0.61
   Survivors 21 9 5 0.73 - 8 9 5 0.56 - 57 0.67
  1. S, wild type; R, 1014F; RS, heterozygote; RR, homozygote resistant; P(HW), goodness of fit to Hardy Weinberg Equilibrium (significant if P < 0.05); F(kdr), frequency of the Kdr allele.