Impact of Insecticide Resistance on P. falciparum Vectors’ Biting, Feeding, and Resting Behaviour in Selected Clusters in Teso North and South Subcounties in Busia County, Western Kenya

Table 1

Phenotypic and genotypic resistance levels in Anopheles gambiae sensu latu collected from five clusters from Teso North and Teso South subcounties of Busia County, Western Kenya between 2012 and 2014.

Clusters	Phenotypic resistance levels (% mortality)			Genotypic resistance levels (%)
	Permethrin	Deltamethrin		SS	LS	LL
Kaliwa			223	91.5	2.7	5.8
Odioi			424	76.9	4.7	18.4
Akiriamasit			216	76.9	13.9	9.2
Kengatunyi			85	57.6	7.1	35.3
Rwatama			148	93.9	3.4	2.7
Mean	71	77	291.2	79.4	6.9	13.7
Teso North	67.6	73	449	78.6	9.4	12.0
Teso South	76	82	647	82.0	4.0	14.0

WHO criteria for phenotypic susceptibility are as follows: mortality rates between 98% and 100% indicate full susceptibility; mortality rates between 90% and 97% require further investigation while in mortality rates < 90%, the population is considered resistant to the tested insecticides.