Onchocerciasis

Abstract
ONCHOCERCIASIS, a filarial infection transmitted by black flies, has taken its toll of countless generations of Africans. Today, it afflicts 40 million and has blinded between one-quarter and one-half million persons. The regional prevalence and severity vary greatly, but in many regions, the people are resigned and accept the blindness and dermatitis as processes of aging. Although the blindness is devastating, the incessant pruritus that characterizes the dermatitis can be just as unfortunate by preventing sleep and productive work. In addition to inflicting personal misery, onchocerciasis has driven communities away from streams and rivers and from rich lands that offer . . .

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