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Onchocerciasis is a parasitic infection caused by the filarial nematode Onchocerca volvulus. It is a major endemic disease throughout a wide belt of Sub-Saharan Africa. Sudan is the northernmost country in the world endemic for onchocerciasis (Baker and Abdelnur, 1985; Davies and Crosskey, 1991; Higazi et al., 2000, 2001). Onchocerciasis in Sudan is found in three foci reflecting the distribution of swiftly flowing rivers and streams in the country: Northern Sudan (AbuHamed focus), between the