Table 1.

Plateau and Nasarawa states: baseline microfilaridermia endemicity, numbers of ivermectin-based treatment rounds, and years of mass drug administration (MDA), by local government area (LGA)

State		LGA	Range of baseline village microfilariae prevalence in skin snips in surveys conducted in 108 villages, 1991–1992 (%)	Onchocerciasis endemicity classification	No. of ivermectin treatment rounds	Years of ivermectin-based MDA
1	Nasarawa	Akwanga	5–100	Hyperendemic	26	1992–2017
2		Awe	0–4	Non-/hypo-endemic	10	2003–2012‡
3		Doma	0–4	Non-/hypo-endemic	11	2002–2012‡
4		Karu	0–79	Mesoendemic	25	1993–2017
5		Keana*	0–4	Non-/hypo-endemic	8	2002–2009‡
6		Keffi†	0–4	Non-hypendemic	8	2002–2009‡
7		Kokona*	30–79	Mesoendemic	25	1993–2017
8		Lafia	0–29	Mesoendemic	25	1993–2017
9		Nasarawa*	0–4	Non-/hypo-endemic	11	2002–2012‡
10		Nasarawa Egon	5–79	Mesoendemic	26	1992–2017
11		Obi	0–4	Non-/hypo-endemic	11	2002–2012‡
12		Toto	5–100	Hyperendemic	26	1992–2017
13		Wamba*	30–79	Mesoendemic	11	2002–2012‡
1	Plateau	Barkin Ladi	0–4	Non-/hypo-endemic	8	2002–2009
2		Bassa	5–79	Mesoendemic	26	1992–2017‡
3		Bokkos	30–79	Mesoendemic	25	1993–2017
4		Jos East*	5–79	Mesoendemic	26	1992–2017
5		Jos North	0–4	Non-/hypo-endemic	8	2002–2009‡
6		Jos South	0–4	Non-/hypo-endemic	11	2002–2012‡
7		Kanam	0–4	Non-/hypo-endemic	11	2002–2012‡
8		Kanke*	5–29	Mesoendemic	25	1993–2017
9		Langtang North	0–4	Non-/hypo-endemic	11	2002–2012‡
10		Langtang South	0–4	Non-/hypo-endemic	8	2003–2009‡
11		Mangu	0–4	Non-/hypo-endemic	11	2002–2012‡
12		Mikang*	0–4	Non-Hypo-endemic	11	2002–2012‡
13		Pankshin	0–29	Mesoendemic	25	1993–2017
14		Qua’an Pan	0–4	Non-/hypo-endemic	11	2002–2012‡
15		Riyom*	0–4	Non-/hypo-endemic	11	2002–2012‡
16		Shendam	0–4	Non-/hypo-endemic	11	2002–2012‡
17		Wase	0–4	Non-/hypo-endemic	11	2002–2012‡

* Indicate LGAs formed after the baseline mapping whose endemicity has been assigned based on values from their parent LGAs’ baseline assessments in 1991. Keana was carved from Obi, Kokona from Keffi,† Wamba from Akwanga, Jos East from Jos South, Kanke and Mikang from Pankshin, and Riyom from Barkin Ladi.

† Keffi (originally mesoendemic) was reduced in size during the partition and made into a purely urban LGA, with Kokona created from the remainder of Keffi. This resulted in major endemicity changes for Keffi going from mesoendemic on original maps to current hypo-endemic classification, on the assumption that urban areas do not ecologically support transmission of onchocerciasis.

‡ MDA provided for lymphatic filariasis with combination therapy with ivermectin–albendazole.