Experimental hut and bioassay evaluation of the residual activity of a polymer-enhanced suspension concentrate (SC-PE) formulation of deltamethrin for IRS use in the control of Anopheles arabiensis

Table 5 Experimental hut summary results for wild free-flying An. arabiensis during the supplementary experiments

Insecticide (wall substrate)	Outcome measure	Number of months after spraying
Insecticide (wall substrate)	Outcome measure	11-15 uncovered	11-15 ceiling covered	16-17 walls and ceiling covered †	18 uncovered
Delta SC-PE 25 mg/m² (Mud)	Number collected	365	499	521	183
	% Mortality	41	37	3†	42
	95% CI	31-52	28-48	1-6	35-50
	% Blood-fed	40	36	56	32
	% Blood-feeding inhibition	42	33	5	20
Delta WG 25 mg/m² (Mud)	Number collected	300	559	463	130
	% Mortality	46	33	3†	36
	95% CI	31-61	24-43	1-7	28-45
	% Blood-fed	45	29	51	33
	% Blood-feeding inhibition	35	46	14	18
DDT WP 2000 mg/m² (Mud)	Number collected	218	305	190	214
	% Mortality	51	37	3†	36
	95% CI	39-62	25-52	1-11	28-45
	% Blood-fed	35	37	80	38
	% Blood-feeding inhibition	49	32	0	3
Delta SC-PE 25 mg/m² (Concrete)	Number collected	373	659	715	160
	% Mortality	28	37	41	39
	95% CI	22-34	28-48	34-48	30-49
	% Blood-fed	48	39	52	43
	% Blood-feeding inhibition	30	28	12	0
Delta WG 25 mg/m² (Concrete)	Number collected	310	528	759	152
	% Mortality	41	37	44	42
	95% CI	27-57	30-44	37-52	33-52
	% Blood-fed	32	32	56	39
	% Blood-feeding inhibition	54	41	5	3
DDT WP 2000 mg/m² (Concrete)	Number collected	262	508	705	174
	% Mortality	49	44	42	40
	95% CI	37-61	34-54	35-48	28-52
	% Blood-fed	44	34	58	33
	% Blood-feeding inhibition	36	37	2	18
Untreated (Mud)	Number collected	276	369	376	98
	% Mortality	7	12	2†	2
	95% CI	3-16	7-19	0-7	1-8
	% Blood-fed	69	54	59	40

Notes : †Indicates that the sprayed walls and ceiling of the experimental hut were covered with untreated plastic sheeting.

ISSN: 1756-3305