Intensity and mechanisms of deltamethrin and permethrin resistance in Anopheles gambiae s.l. populations in southern Benin

Table 2 Mortality rate difference and 95% confidence interval (CI) for 1× permethrin with and without pre-exposure to PBO

Site	Insecticide	Dead	Alive	Total	Mortality rate (%)	Rate difference	95% CI
Adjohoun	PBO + 1× Permethrin	56	10	66	85	41	26–56
Adjohoun	Permethrin	27	35	62	44	41	26–56
Allada	PBO + 1× Permethrin	47	42	89	53	35	22–48
Allada	Permethrin	17	79	96	18	35	22–48
Bohicon	PBO + 1× Permethrin	69	27	96	72	50	38–62
Bohicon	Permethrin	22	80	102	22	50	38–62
Cotonou	PBO + 1× Permethrin	72	24	96	75	31	18–44
Cotonou	Permethrin	42	54	96	44	31	18–44
Porto-Novo	PBO + 1× Permethrin	51	50	101	50	36	24–49
Porto-Novo	Permethrin	12	73	85	14	36	24–49
All sites	PBO + 1× Permethrin	295	153	448	66	39	26–52
All sites	Permethrin	120	321	441	27	39	26–52

*Differences in mortality rates between 1× permethrin and PBO + 1× permethrin were significant (p < 0.001) at all sites using the χ² test

ISSN: 1756-3305