Intensity of insecticide resistance in the major malaria vector Anopheles funestus from Chikwawa, rural Southern Malawi

Table 1 CDC bottle assays for Chakanira and Sisewu villages

Village	Insecticide	Dose	No. mosquitoes exposed^a	Unadjusted % mortality	Adjusted % mortality^b
Chakanira	Control	0×	133	9.0	0.0
	Deltamethrin	1×	38	84.2	82.6
		2.5×	90	82.2	80.5
		5×	75	94.7	94.1
		10×	71	100.0	100.0
	Permethrin	1×	73	93.2	92.5
		2.5×	62	93.5	92.9
		5×	68	97.1	96.8
		10×	77	100.0	100.0
	Alpha-cypermethrin	1×	52	84.6	83.1
		2.5×	53	86.8	85.5
		5×	74	95.9	95.5
		10×	65	95.4	94.9
Sisewu^c	Control	0×	25	8.0	0.0
	Deltamethrin	1×	21	90.5	89.6
		2.5×	25	92.0	91.3
		5×	38	94.7	94.3
		10×	17	100.0	100.0

^aLow sample numbers could have affected these tests
^bAdjusted mortality using Abbott’s formula as described by WHO [26]
^cDue to limited mosquito numbers collected from Sisewu village, susceptibility tests were only carried out on one insecticide, deltamethrin

ISSN: 1756-3305