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Table 2 Comparision of physico chemical characteristics of breeding sites from urban and rural areas in Douala and Yaoundé.

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

  Douala Yaoundé
Rural breeding sites Urban breeding sites P value Rural breeding sites Urban breeding sites P value
N 6 109   7 158  
Alcalinity 105.8 ± 44.7 113.5 ± 2.04 0.63 105.7 ± 30.7 173.2 ± 1.9 0.22
Aluminium 0.13 ± 0.07 0.68 ± 0.08 0.81 0.05 ± 0.03 0.028 ± 0.001 0.97
Ammonia 0.14 ± 0.05 1.1 ± 0.03 0.005 0.71 ± 0.41 2 ± 0.03 0.20
Nitrates 1.53 ± 0.5 5.38 ± 0.15 0.105 1.43 ± 0.4 3.37 ± 0.05 0.19
Nitrites 0.01 ± 0.006 0.28 ± 0.02 0.19 0.065 ± 0.02 0.28 ± 0.007 0.25
Manganese 0.012 ± 0.004 31.5 ± 1.5 0.105 0.008 ± 0.002 0.01 ± 0.0002 0.93
Potassium 4.55 ± 0.8 12.3 ± 0.8 0.016 12.17 ± 5.01 12.7 ± 0.58 0.90
Iron 5.53 ± 0.61 13.8 ± 0.9 0.24 2 ± 1.25 4.2 ± 0.13 0.08
Phosphate 0.5 ± 0.18 0.76 ± 0.04 0.39 0.65 ± 0.18 0.93 ± 0.01 0.71
Sulfate 10.5 ± 4.9 29.15 ± 2.7 0.61 13.9 ± 4 34 ± 0.5 0.34
Mg hardness 1.67 ± 1.3 17.3 ± 0.3 0.23 6.07 ± 4.5 19.8 ± 0.5 0.12
Total hardness 52.5 ± 18.9 57.3 ± 1.1 0.90 27.1 ± 8.8 111.1 ± 1.19 0.003
Conductivity 205.57 ± 37.9 393.4 ± 3.6 0.11 122.7 ± 37.6 830.8 ± 11.2 0.000
Turbidity 177.5 ± 20 105.2 ± 2.6 0.006 89.2 ± 38.2 103.7 ± 1.9 0.61
pH 6.84 ± 0.26 6.63 ± 0.01 0.76 5.9 ± 0.6 6.8 ± 0.016 0.55
Dissoved Oxygen 115.3 ± 7.8 170.8 ± 25.5 0.61 50.7 ± 21.5 94.2 ± 1.6 0.09
  1. Significant if P < 0.05