Onchocerciasis

Infection transmitted by the bite of infected blackflies causing severe itching and eye lesions as the adult worm produces larvae and leading to visual impairment and permanent blindness.

The filarial worms (O. volvulus) are transmitted by the repeated bites of infected black flies (Simulium spp.) . These black flies breed in fast-flowing rivers and streams, mostly in remote villages located near fertile land where people rely on agriculture.

In human, female adult worms produce embryonic larvae (microfilariae) that migrate to the skin, eyes and other organs. When a female black fly bites an infected person during a blood meal, it also ingests microfilariae which develop further into the infectious L3 stage and are then transmitted to the next human host during subsequent bites.

76 maps found
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550 maps found
Region Locationsort descending Program stage Years Maps Data
Western Africa Togo MDA/PC coverage (Therapeutic coverage) 2016 Download map png Download map
Western Africa Togo MDA/PC rounds (Therapeutic coverage) 2013 - 2016 Download map png Download map
Western Africa Togo MDA/PC coverage (Geographic coverage) 2016 Download map png Download map
Western Africa Togo MDA/PC coverage (Therapeutic coverage) 2015 Download map png Download map
Eastern Africa Uganda MDA/PC coverage (Geographic coverage) 2016 Download map png Download map
Eastern Africa Uganda Mapping Surveys (Nodule Palpation) 2008 Download map png Download map
Eastern Africa Uganda Impact Assessment (Skin Biopsy) Download map png Download map
Eastern Africa Uganda MDA/PC coverage (Geographic coverage) 2014 Download map png Download map
Eastern Africa Uganda MDA/PC coverage (Therapeutic coverage) 2015 Download map png Download map
Eastern Africa Uganda MDA/PC coverage (Therapeutic coverage) 2014 Download map png Download map
Eastern Africa Uganda MDA/PC coverage (Therapeutic coverage) 2016 Download map png Download map
Eastern Africa Uganda MDA/PC coverage (Geographic coverage) 2013 Download map png Download map
Eastern Africa Uganda MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Eastern Africa Uganda MDA/PC rounds (Therapeutic coverage) 2013 - 2016 Download map png Download map
Eastern Africa Uganda Endemicity 2017 Download map png Download map
Eastern Africa Uganda MDA/PC rounds (Geographic coverage) 2013 - 2016 Download map png Download map
Eastern Africa Uganda MDA/PC coverage (Therapeutic coverage) 2013 Download map png Download map
Southern Africa Zambia MDA/PC coverage (Geographic coverage) 2014 Download map png Download map
Southern Africa Zambia MDA/PC rounds (Therapeutic coverage) 2013 - 2016 Download map png Download map
Southern Africa Zambia Endemicity 2017 Download map png Download map
Southern Africa Zambia MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Southern Africa Zambia MDA/PC coverage (Therapeutic coverage) 2015 Download map png Download map
Southern Africa Zambia MDA/PC coverage (Therapeutic coverage) 2014 Download map png Download map
Southern Africa Zambia MDA/PC coverage (Therapeutic coverage) 2016 Download map png Download map
Southern Africa Zambia MDA/PC coverage (Geographic coverage) 2013 Download map png Download map
Southern Africa Zambia MDA/PC rounds (Geographic coverage) 2013 - 2016 Download map png Download map
Southern Africa Zambia MDA/PC coverage (Geographic coverage) 2016 Download map png Download map
Southern Africa Zambia MDA/PC coverage (Therapeutic coverage) 2013 Download map png Download map
Southern Africa Zimbabwe MDA/PC coverage (Therapeutic coverage) 2015 Download map png Download map
Southern Africa Zimbabwe MDA/PC coverage (Geographic coverage) 2016 Download map png Download map
Southern Africa Zimbabwe MDA/PC coverage (Therapeutic coverage) 2013 Download map png Download map
Southern Africa Zimbabwe MDA/PC rounds (Therapeutic coverage) 2013 - 2016 Download map png Download map
Southern Africa Zimbabwe Endemicity 2017 Download map png Download map
Southern Africa Zimbabwe MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Southern Africa Zimbabwe MDA/PC rounds (Geographic coverage) 2013 - 2016 Download map png Download map
Southern Africa Zimbabwe MDA/PC coverage (Therapeutic coverage) 2016 Download map png Download map
Southern Africa Zimbabwe MDA/PC coverage (Geographic coverage) 2014 Download map png Download map
Southern Africa Zimbabwe MDA/PC coverage (Therapeutic coverage) 2014 Download map png Download map
Southern Africa Zimbabwe MDA/PC coverage (Geographic coverage) 2013 Download map png Download map
Eastern Africa Tanzania (Zanzibar) MDA/PC coverage (Geographic coverage) 2014 Download map png Download map
Eastern Africa Tanzania (Zanzibar) MDA/PC coverage (Therapeutic coverage) 2016 Download map png Download map
Eastern Africa Tanzania (Zanzibar) MDA/PC rounds (Therapeutic coverage) 2013 - 2016 Download map png Download map
Eastern Africa Tanzania (Zanzibar) MDA/PC coverage (Therapeutic coverage) 2015 Download map png Download map
Eastern Africa Tanzania (Zanzibar) Endemicity 2017 Download map png Download map
Eastern Africa Tanzania (Zanzibar) MDA/PC coverage (Therapeutic coverage) 2014 Download map png Download map
Eastern Africa Tanzania (Zanzibar) MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Eastern Africa Tanzania (Zanzibar) MDA/PC coverage (Therapeutic coverage) 2013 Download map png Download map
Eastern Africa Tanzania (Zanzibar) MDA/PC coverage (Geographic coverage) 2013 Download map png Download map
Eastern Africa Tanzania (Zanzibar) MDA/PC coverage (Geographic coverage) 2016 Download map png Download map
Eastern Africa Tanzania (Zanzibar) MDA/PC rounds (Geographic coverage) 2013 - 2016 Download map png Download map

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