631. A preventable disease - river blindness - cost this man his sight Subject(s): World Health Organization
632. The fixed-wing aeroplane can make accurate insecticide drops at 60 mph over open stretches of river Subject(s): AircraftWorld Health Organization
633. A pest that causes all the trouble. A close-up of the blackfly, Simulium damnosum, feeding on human blood Subject(s): World Health Organization
634. The dull patch in a victim's eye shows where the parasitic worm transmitted by the black-fly's bite has caused irreparable damage. The only real answer to onchocerciasis is to wipe out the fly wherever there are human settlements Subject(s): World Health Organization
635. The face of desperation. River blindness has robbed this west African not merely of his sight but much of his earning power at an age when he should have been making his greatest contribution to the community Subject(s): World Health Organization
636. This man being led through a village in Upper Volta is blind as a result of river blindness - onchocerciasis - and nearly 60 per cent of the people in his village suffer from this disease Subject(s): ChildWorld Health Organization
637. One of the telltale sings of onchocerciasis is the fibrous nodule which forms under the victim's skin. This child of two already has such a nodule on his head Subject(s): MothersMother-Child RelationsChildWorld Health Organization
638. In districts heavily infected with onchocerciasis there are villages where all the adults are blind Subject(s): ChildWorld Health Organization
639. Onchocerciasis victim in the village of Tienkura, Upper Volta Subject(s): World Health Organization.