Baseline entomologic data on malaria transmission in prelude to an indoor residual spraying intervention in the regions of Alibori and Donga, Northern Benin, West Africa

Salako, Albert S.; Ahogni, Idelphonse; Kpanou, Casimir; Sovi, Arthur; Azondekon, Roseric; Sominahouin, André A.; Tokponnon, Filémon; Gnanguenon, Virgile; Dagnon, Fortuné; Iyikirenga, Laurent; Akogbeto, Martin C.

doi:10.1186/s12936-018-2507-y

Table 3 Sporozoite index of Anopheles gambiae s.l.

From: Baseline entomologic data on malaria transmission in prelude to an indoor residual spraying intervention in the regions of Alibori and Donga, Northern Benin, West Africa

Districts	Sites	May	June	July	August	October	January	February	Mean	Mean	Mean (7 months)	CI 95%	p-value
Districts	Sites	(DS)	(RS)	(RS)	(RS)	(RS)	(DS)	(DS)	(DS)	(RS)	Mean (7 months)	CI 95%	p-value
Kandi	Sonsoro*
	Thorax	38	119	175	166	244	10	29	77	704	781		0.212
	Thorax+	6	6	9	4	30	0	0	6	49	55
	SI	15.79	5.04	5.14	2.41	12.30	0	0	7.79^a	6. 96^a	7.042	[5.34–9.06]
	Kossarou
	Thorax	7	4	6	16	49	2	4	13	75	88
	Thorax+	1	0	0	0	8	1	0	2	8	10
	SI	14.29	0	0	0	16.33	50	0	15.38^a	10.67^a	11.36	[5.58–19.90]
	Total
	Thorax	45	123	181	182	293	12	33	90	779	869
	Thorax+	7	6	9	4	38	1	0	8	57	65
	SI	15.56	4.88	4.97	2.20	12.97	8.33	0	8.89^a	7.32^a	7.47	[5.81–9.43]
Gogounou	Gounarou*
	Thorax	7	8	33	93	167	22	22	51	301	352		0.0016
	Thorax+	0	1	2	10	27	0	1	1	40	41
	SI	0	12.50	6.06	10.75	16.17	0	4.55	1.96^a	13.29^b	11.65	[8.48–15.46]
	Bantansoue
	Thorax	0	23	64	72	71	33	30	63	230	293
	Thorax+	0	1	1	2	5	3	1	4	9	13
	SI	–	4.35	1.56	2.78	7.04	9.09	3.33	6.35^a	3.91^a	4.44	[2.38–7.46]
	Total
	Thorax	7	31	97	165	238	55	52	114	531	645
	Thorax+	0	2	3	12	32	3	2	5	49	54
	SI	0	6.45	3.09	7.27	13.45	5.45	3.85	4.39^a	9.23^a	8.37	[6.35–10.78]
Total (Alibori region)	Thorax	52	154	278	347	531	67	85	204	1310	1514
	Thorax+	7	8	12	16	70	4	2	13	106	119
	SI	13.46	5.19	4.32	4.61	13.18	5.97	2.35	6.37^a	8.09^a	7.86	[6.55–9.33]
Djougou	Barienou*
	Thorax	56	57	251	198	145	51	171	278	651	929		0.223
	Thorax+	15	4	6	25	16	3	15	33	51	84
	SI	26.79	7.02	2.39	12.63	11.03	5.88	8.77	11.87^a	7.83^a	9.04	[7.27–11.07]
	Zountori
	Thorax	0	0	33	59	41	18	6	24	133	157
	Thorax+	0	0	1	5	2	1	0	1	8	9
	SI	–	–	3.03	8.47	4.88	5.56	0	4.17^a	6.02^a	5.73	[2.65–10.60]
	Total
	Thorax	56	57	284	257	186	69	177	302	784	1086
	Thorax+	15	4	7	30	18	4	15	34	59	93
	SI	26.79	7.02	2.46	11.67	9.68	5.80	8.47	11.26^a	7.53^a	8.56	[6.96–10.38]
Copargo	Kataban*
	Thorax	13	189	274	284	198	35	56	104	945	1049		1
	Thorax+	0	8	16	34	21	3	0	3	79	82
	SI	0	4.23	5.84	11.97	10.61	8.57	0	2.88^a	8.36^a	7.81	[6.26–9.61]
	Kparakouna
	Thorax	1	11	27	61	21	4	14	19	120	139
	Thorax+	0	0	0	6	5	0	0	0	11	11
	SI	0	0	0	9.84	23.81	0	0	0^a	9.16^a	7.91	[4.01–13.71]
	Total
	Thorax	14	200	301	345	219	39	70	123	1065	1188
	Thorax+	0	8	16	40	26	3	0	3	90	93
	SI	0	4	5.32	11.59	11.87	7.69	0	2.44^a	8.45^b	7.83	[6.36–9.50]
Total (Donga region)	Thorax	70	257	585	602	405	108	247	425	1849	2274
	Thorax+	15	12	23	70	44	7	15	37	149	186
	SI	21.43	4.67	3.93	11.63	10.86	6.48	6.07	8.71^a	8.06^a	8.18	[7.08–9.38]
Total (rural areas)	Thorax	114	373	733	741	754	118	278	510	2601	3111		0.086
	Thorax+	21	19	33	73	94	6	16	43	219	262
	SI	18.42	5.09	4.50	9.85	12.47	5.08	5.76	8.43^a	8.42^a	8.42	[7.46–9.45]
Total (urban areas)	Thorax	8	38	130	208	182	57	54	119	558	677
	Thorax+	1	1	2	13	20	5	1	7	36	43
	SI	12.50	2.63	1.54	6.25	10.99	8.77	1.85	5.88^a	6.45^a	6.35	[4.63–8.46]
Grand total	Thorax	122	411	863	949	936	175	332	629	3159	3788
	Thorax+	22	20	35	86	114	11	17	50	255	305
	SI	18.03	4.87	4.06	9.06	12.18	6.29	5.12	7.95^a	8.07^a	8.05	[7.20–8.96]

SI: sporozoite index; CI: confidence interval; *: rural area; DS: dry season; RS: rainy season
^a,bThe SI/season of the same site bearing different letters are statistically different

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