Onchocerciasis treatment distribution. Third World health worker placing ivermectin tablets, for the treatment of onchocerciasis (\river blindness\"),

---

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."

---

Size: 3478px × 5138px
Photo credit: © A. CRUMP, TDR, WHO/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: bicycle, blindness, distributi, health, ivermectin, medicine, onchocerciasis, river, sudan, ta, tab, tabl, tablet, worker, world