Geographical aspects of onchocerciasis.
D000354:Africa, Western; D001766:Blindness / Q000209:etiology; D004175:Diptera / Q000469:parasitology; D006801:Humans; D008842:Microfilariae / Q000469:parasitology / Q000472:pathogenicity; D009855:Onchocerciasis / Q000150:complications / Q000453:epidemiology*