Impacts of ivermectin mass drug administration for onchocerciasis on mosquito populations of Ogun state, Nigeria

Parasites & Vectors

Table 2 Ivermectin MDA coverage and mosquito population changes in the intervention communities

		Kugba-Ajagbe	Amini	p-value
N^o of eligible persons surveyed
Female		32	23
Male		29	18
Total		61	41
N^o. of persons treated (%)
Female		17 (68.0)	14 (51.9)
Male		8 (32.0)	13 (48.1)
Total coverage		25 (41.0)	27 (65.9)	0.024*
Anopheles sp.
Indoor density	14–13 days before MDA	1.97	0.90
	2–3 days post-MDA	1.70 (p = 0.446)	0.33 (p = 0.005)^†
	13–14 days post-MDA	1.93 (p = 0.926)	0.97 (p = 0.789)
Outdoor density	14–13 days before MDA	1.00	0.17
	2–3 days post-MDA	0.83 (p = 0.763)	1.00 (0.068)
	13–14 days post-MDA	0.33 (p = 0.157)	0.00
Indoor parity rate	14–13 days before MDA	96.61	92.59
	2–3 days post-MDA	45.10 (p < 0.001)^†	40.00 (p = 0.002)^†
	13–14 days post-MDA	67.24 (p < 0.001)^†	93.10 (p = 0.667)
Outdoor parity rate	14–13 days before MDA	83.33	100.00
	2–3 days post-MDA	80.00 (p = 0.727)	50.00 (p = 0.600)
	13–14 days post-MDA	0.00 (p = 0.107)	–
Culex sp.
Indoor density	14–13 days before MDA	0.13	0.00
	2–3 days post-MDA	0.07 (p = 0.414)	0.13
	13–14 days post-MDA	0.23 (p = 0.366)	0.27
Outdoor density	14–13 days before MDA	1.50	4.17
	2–3 days post-MDA	5.33 (p < 0.001)^†	1.75 (p = 0.036)^†
	13–14 days post-MDA	1.50 (p = 1.000)	0.50 (p = 0.001)^†
Indoor parity rate	14–13 days before MDA	100.00	–
	2–3 days post-MDA	100.00	100.00
	13–14 days post-MDA	100.00	87.50
Outdoor parity rate	14–13 days before MDA	88.89	64.00
	2–3 days post-MDA	96.88 (p = 0.395)	100.00 (p = 0.073)
	13–14 days post-MDA	88.89 (p = 0.765)	100.00 (p = 0.436)

*Difference between total MDA coverage is statistically significant
^†Density or parity rate is statistically significantly higher or lower than before MDA

ISSN: 1756-3305