Insecticide resistance in Anopheles gambiae: data from the first year of a multi-country study highlight the extent of the problem

Table 1 Species distribution in alive and dead progeny after WHO susceptibility tests for An gambiae s.l. from Burkina Faso.

Goundry	Sample size	A	S	M	M/S	P Value
DDT Total	102	79	17	4	0
DDT Survivors	22	5	77	18	0	0
DDT Dead	80	100	0	0	0	0
Permethrin Total	101	49	30	19	2
Permethrin Survivors	24	29	50	21	0	0.007
Permethrin Dead	77	67	12	17	4	0.01
Kuinima
DDT Total	104	22	68	10	0
DDT Survivors	72	2	90	8	0	0
DDT Dead	32	66	19	15	0	0
Permethrin Total	105	28	61	10	1
Permethrin Survivors	85	22	68	10	0	0.552
Permethrin Dead	23	48	39	9	4	0.008
Koupela
DDT Total	105	71	15	14	0
DDT Survivors	25	16	52	32	0	0
DDT Dead	80	88	4	8	0	0.007
Permethrin Total	104	60	14	26	0
Permethrin Survivors	27	41	44	15	0	0
Permethrin Dead	77	67	29	4	0	0
Soumousso
DDT Total	102	20	65	13	2
DDT Survivors	80	7	78	13	2	0.059
DDT Dead	22	68	18	14	0	0
Permethrin Total	107	36	63	1	0
Permethrin Survivors	58	5	95	0	0	0
Permethrin Dead	49	73	25	2	0	0

Only the results from round 2 (17-30^th October 2008) are presented. In all cases percentage mortality was ≤ 80%. Values are shown as percentage of total number of surviving or dead mosquitoes for each species. The total population represents the species distribution in the total population available for bioassay (see materials and methods for further details). The P value is the probability that the species distribution in the Survivors or Dead subset differs from the distribution in the total population.

ISSN: 1475-2875