Journal of Parasitology Research

Research Article

Species Composition, Phenotypic and Genotypic Resistance Levels in Major Malaria Vectors in Teso North and Teso South Subcounties in Busia County, Western Kenya

Table 5

Knockdown times for 50 and 95% of the susceptible Kisumu Anopheles gambiae strain and the Teso North and Teso South ₀Anopheles gambiae to permethrin, deltamethrin, and bendiocarb diagnostic concentrations.


			Susceptible Kisumu Asembo Anopheles gambiae strain				Teso North and South ₀Anopheles gambiae samples
Diagnostic concentrations	Clusters		KDT₅₀ [CI] (min)	KDT₉₅ [CI] (min)	Mortality after 60 min (%)		KDT₅₀ [CI] (min)	KDT₉₅ [CI] (min)	Mortality after 24 h (%)	KDT₅₀ R

0.75% permethrin	Kaliwa	100	14.155 [6.207-20.372]	32.462 [25.469-50.817]	100	95	41.285 [38.579-44.369]	103.363 [88.043-129.284]	75	2.9
	Odioi	100	17.658 [4.133-27.790]	58.565 [34.896-1259.225]	100	100	46.607 [36.379-71.682]	189.492 [104.482-1062.44]	57	2.6
	Akiriamasit	100	13.977 [3.707-21.112]	61.544 [37.499-466.702]	100	75	24.689 [19.390-30.196]	66.066 [48.540-128.794]	71	1.8
	Kengatunyi	100	8.189 [5.947-10.563]	27.813 [21.837-39.676]	100	100	36.397 [34.402-38.442]	74.654 [67.294-85.557]	86	4.4
	Rwatama	100	14.982 [12.625-17.192]	35.886 [29.288-48.448]	100	76	37.085 [34.536-39.788]	84.719 [73.667-102.885]	66	2.5
0.05% deltamethrin	Kaliwa	100	17.590 [15.962-19.036]	26.432 [23.914-30.975]	100	76	30.930 [23.644-41.566]	86.182 [56.925-292.337]	78	1.8
	Odioi	100	5.780 [3.534-7.794]	31.050 [25.978-39.834]	100	78	31.757 [29.521-34.007]	71.317 [63.207-83.777]	66	5.5
	Akiriamasit	100	13.256 [4.132-19.714]	62.378 [38.849-328.090]	100	96	35.448 [30.809-40.298]	70.829 [58.069-102.798]	75	2.7
	Kengatunyi	100	2.698 [0.722-4.916]	24.154 [18.974-32.751]	100	71	22.204 [20.821-25.139]	49.690 [46.172-52.962]	86	8.2
	Rwatama	100	17.012 [15.200-19.304]	50.773 [31.357-402.770]	100	67	30.423 [27.859-33.198]	80.692 [70.893-97.137]	78	1.8
0.1% bendiocarb	Odioi	100	5.432 [0.679-10.006]	51.612 [33.976-172.401]	100	61	20.543 [18.570-23.086]	58.895 [53.951-67.980]	100	3.8
0.1% bendiocarb	Akiriamasit	100	5.439 [0.258-10.444]	39.386 [25.578-168.087]	100	100	24.886 [17.223-31.783]	48.181 [36.636-100.030]	100	4.6

: sample size; CI: confidence interval at 50 and 95%; KDT₅₀: knockdown times for 50% of exposed mosquitoes; KDT₉₅: knockdown times for 95% of exposed mosquitoes; KDT₅₀ R: ratio KDT₅₀ Teso North and Teso South ₀ female mosquito samples/KDT₅₀ susceptible Kisumu Asembo Anopheles gambiae strain; min: time in minutes.