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Onchocerciasis in the WHO African region 
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Reference ID U27J24 
Headline Onchocerciasis in the WHO African region 
Description Onchocerciasis is a parasitic disease caused by the filarial worm Onchocerca volvulus. It is transmitted through the bites of infected blackflies of Simulium species, which carry immature larval forms of the parasite from human to human. In the human body, the larvae form nodules in the subcutaneous tissue, where they mature to adult worms. After mating, the female adult worm can release up to 1000 microfilariae a day. These move through the body, and when they die they cause a variety of conditions, including blindness, skin rashes, lesions, intense itching and skin depigmentation.

Our photo shows Kadiatou, wife of a farmer living in Kayes, Mali. Kayes is on the Senegal river and in this area, about 90% of the population is affected by onchocerciasis. Kadiatou is not blind yet but she knows that soon she will lose her sight. Her young 13-year-old cousin, Diallo, who lives with her, is already blind. 
c.1970 - c.1973 
Asset date 01/01/1970 
Country, area, WHO office Mali
City Kayes 
WHO Region AFRO
Copyright © WHO / Pierre A. Pittet 
Consent No 
File size 3.74 MB 
Visibility class: 
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Public 
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