Table 1.

Characteristics of ivermectin mass distribution in the 119 comunities endemic for onchocerciasis in Ecuador

Location/endemicity	Ivermectin treatments			Mean treatment coverage % (range)
	No. of communities	Year of first treatment	No. treatments Median (range)
Río Cayapas:
Hyperendemic	31	1991–1996*	22 (13–22)	84.8 (49.9–95.3)
Mesoendemic	9	1991	16 (16–16)	86.7 (74.2–97.7)
Hypoendemic	7	1991–1993	16 (14–16)	84.7 (71.0–94.4)
Río Onzole:
Hyperendemic	3	1991–1992	16 (15–17)	84.5 (63.4–98.1)
Mesoendemic	1	1991	16	90.3 (72.7–100)
Hypoendemic	13	1991–1993	15 (15–16)	87.2 68.5–97.2)
Río Santiago:
Hyperendemic	8	1990–1991†	19 (17–19)	90.7 (78.1–98.7)
Mesoendemic	4	1990	18 (17–19)	87.7 (65.4–99.0)
Hypoendemic	23	1990–1991	16 (16–17)	88.9 (81.1–100)
Satelite foci:
Mesoendemic	9	1991–1993	18 (14–19)	83.2 (37.3–97.9)
Hypoendemic	11	1990–1997	13 (11–17)	89.9 (48.7–98.4)

*In the Río Cayapas first treatments with ivermectin were provided in the hyperendemic communities in the following years: 1991 (23 communities), 1992 (1), 1995 (1), and 1996 (6). †In the Río Santiago first treatments with ivermectin were provided in the hyperendemic communities in the following years: 1990 (7 communities) and 1991 (1 community).