Epidemiology and natural history of onchocerciasis.
D000328:Adult; D000349:Africa; D000818:Animals; D001766:Blindness / Q000209:etiology; D002417:Cattle; D002489:Central America; D004463:Ecology; D005128:Eye Diseases / Q000453:epidemiology* / Q000209:etiology / Q000517:prevention & control; D006801:Humans; D008875:Middle Aged; D009854:Onchocerca; D009855:Onchocerciasis / Q000150:complications / Q000453:epidemiology* / Q000209:etiology / Q000517:prevention & control; D006113:United Kingdom