Onchocerciasis treatment distribution. Third World health worker placing ivermectin tablets,for the treatment of onchocerciasis ("river blindness"),on his bicycle. He is distributing the tablets to people in the surrounding area. Onchocerciasis is caused by the infective tiny worms (microfilariae) of Onchocerca volvulus. The larvae are transmitted from person to person by biting flies which breed in rivers. The larvae grow into adults which produce the tiny worms. Blindness occurs as an allergic reaction when these worms die in or near tissues of the eye. Ivermectin is highly effective at killing the worms when given in doses spaced 6-12 months apart. Photographed in Sudan | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Crump, A. / WHO / TDR |
Taille de l’image : | 3478 px × 5138 px |
Model Release : | Le droit n'est pas encore disponible. Merci de nous contacter avant utilisation. |
Property Release : | Non requis |
Restrictions : | - |