Table 2.

Characteristics of the seven sentinel communities in Esmeraldas Province, Ecuador selected to evaluate the impact of ivermectin treatment on O. volvulus infection

Community	Location/endemicity	Ivermectin treatments				Mean treatment coverage % (range)
		Treatment eligible*	Annual	Twice annual	Treatments
Corriente	Río Cayapas/Hyperendemic	173	1991- 1995	1992–1994	21	86.1 (19.1–99.4)
Grande			1997	1998–1999
			2000	2001–2003
El Tigre	Río Cayapas/Hyperendemic	121	1996–1997	1998–1999	13	94.4 (82.3–100)
			2000	2001–2003
San Miguel	Río Cayapas/Hyperendemic	175	1996–1997	1998–1999	13	91.8 (85.7–97.9)
			2000	2001–2003
Playa de	Río Santiago/Hyperendemic	236	1990	1991–1992	19	93.3 (81.8–100)
Oro			1993–2000	2001–2003
Guayabal	Río Santiago/Hyperendemic	101	1990	1991–1992	19	84.7 (64.4–100)
			1993–2000	2001–2003
Angostura	Río Santiago/Hyperendemic	72	1992–2000	1991	19	89.4 (75.9–100)
				2001–2003
Naranjal	Río Canandé/Mesoendemic	491	1994–2000	1991–1993	19	83.9 (48.5–96)
				2001–2003

*Data from 2004 census.