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.

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600 maps found
Region Locationsort descending Program stage Years Maps Data
Southern Africa eSwatini MDA/PC coverage (Geographic) 2015 Download map
Southern Africa eSwatini MDA/PC coverage (Therapeutic) 2013 Download map
Southern Africa eSwatini MDA/PC coverage (Geographic) 2016 Download map
Southern Africa eSwatini MDA/PC rounds (Geographic) 1990 - 2016 Download map
Southern Africa eSwatini MDA/PC coverage (Therapeutic) 2014 Download map
Southern Africa eSwatini MDA/PC coverage (Geographic) 2014 Download map
Southern Africa eSwatini MDA/PC coverage (Therapeutic) 2015 Download map
Southern Africa eSwatini MDA/PC coverage (Therapeutic) 2016 Download map
Southern Africa eSwatini MDA/PC rounds (Geographic) 2013 - 2016 Download map
Southern Africa eSwatini MDA/PC coverage (Geographic) 2013 Download map
Southern Africa eSwatini 2017 Download map
Eastern Africa Tanzania (Mainland) 2017 Download map
Eastern Africa Tanzania (Mainland) MDA/PC coverage (Therapeutic) 2015 Download map
Eastern Africa Tanzania (Mainland) Impact Assessment (Skin Biopsy) Download map
Eastern Africa Tanzania (Mainland) MDA/PC rounds (Geographic) 1990 - 2016 Download map
Eastern Africa Tanzania (Mainland) MDA/PC rounds (Therapeutic) 2013 - 2016 Download map
Eastern Africa Tanzania (Mainland) Mapping Surveys (Nodule Palpation) 1996 - 2012 Download map
Eastern Africa Tanzania (Mainland) MDA/PC coverage (Geographic) 2015 Download map
Eastern Africa Tanzania (Mainland) MDA/PC coverage (Geographic) 2016 Download map
Eastern Africa Tanzania (Mainland) Mapping Surveys (Skin Biopsy) 2014 Download map
Eastern Africa Tanzania (Mainland) MDA/PC coverage (Therapeutic) 2016 Download map
Eastern Africa Tanzania (Mainland) MDA/PC rounds (Geographic) 2013 - 2016 Download map
Eastern Africa Tanzania (Mainland) MDA/PC coverage (Therapeutic) 2013 Download map
Eastern Africa Tanzania (Mainland) MDA/PC coverage (Therapeutic) 2014 Download map
Eastern Africa Tanzania (Mainland) MDA/PC coverage (Geographic) 2013 Download map
Eastern Africa Tanzania (Mainland) MDA/PC coverage (Geographic) 2014 Download map
Western Africa The Gambia MDA/PC coverage (Geographic) 2013 Download map
Western Africa The Gambia MDA/PC coverage (Therapeutic) 2014 Download map
Western Africa The Gambia MDA/PC rounds (Geographic) 2013 - 2016 Download map
Western Africa The Gambia MDA/PC coverage (Therapeutic) 2016 Download map
Western Africa The Gambia MDA/PC coverage (Therapeutic) 2013 Download map
Western Africa The Gambia 2017 Download map
Western Africa The Gambia MDA/PC coverage (Therapeutic) 2015 Download map
Western Africa The Gambia MDA/PC coverage (Geographic) 2015 Download map
Western Africa The Gambia MDA/PC coverage (Geographic) 2016 Download map
Western Africa The Gambia MDA/PC coverage (Geographic) 2014 Download map
Western Africa The Gambia MDA/PC rounds (Geographic) 1990 - 2016 Download map
Western Africa The Gambia MDA/PC rounds (Therapeutic) 2013 - 2016 Download map
Western Africa Togo MDA/PC rounds (Geographic) 1990 - 2016 Download map
Western Africa Togo 2017 Download map
Western Africa Togo MDA/PC coverage (Geographic) 2015 Download map
Western Africa Togo MDA/PC coverage (Geographic) 2016 Download map
Western Africa Togo MDA/PC rounds (Geographic) 2013 - 2016 Download map
Western Africa Togo MDA/PC rounds (Therapeutic) 2013 - 2016 Download map
Western Africa Togo MDA/PC coverage (Therapeutic) 2016 Download map
Western Africa Togo MDA/PC coverage (Therapeutic) 2013 Download map
Western Africa Togo MDA/PC coverage (Geographic) 2013 Download map
Western Africa Togo MDA/PC coverage (Therapeutic) 2014 Download map
Western Africa Togo MDA/PC coverage (Geographic) 2014 Download map
Western Africa Togo MDA/PC coverage (Therapeutic) 2015 Download map
Eastern Africa Uganda MDA/PC coverage (Geographic) 2013 Download map
Eastern Africa Uganda Impact Assessment (Skin Biopsy) Download map
Eastern Africa Uganda MDA/PC coverage (Geographic) 2014 Download map
Eastern Africa Uganda Mapping Surveys (Nodule Palpation) 2008 Download map
Eastern Africa Uganda MDA/PC rounds (Therapeutic) 2013 - 2016 Download map
Eastern Africa Uganda MDA/PC coverage (Therapeutic) 2013 Download map
Eastern Africa Uganda 2017 Download map
Eastern Africa Uganda MDA/PC rounds (Geographic) 2013 - 2016 Download map
Eastern Africa Uganda MDA/PC coverage (Geographic) 2015 Download map
Eastern Africa Uganda MDA/PC coverage (Geographic) 2016 Download map
Eastern Africa Uganda MDA/PC coverage (Therapeutic) 2014 Download map
Eastern Africa Uganda MDA/PC coverage (Therapeutic) 2015 Download map
Eastern Africa Uganda MDA/PC coverage (Therapeutic) 2016 Download map
Eastern Africa Uganda MDA/PC rounds (Geographic) 1990 - 2016 Download map
Southern Africa Zambia MDA/PC coverage (Therapeutic) 2013 Download map
Southern Africa Zambia MDA/PC rounds (Therapeutic) 2013 - 2016 Download map
Southern Africa Zambia MDA/PC coverage (Therapeutic) 2016 Download map
Southern Africa Zambia MDA/PC coverage (Therapeutic) 2014 Download map
Southern Africa Zambia MDA/PC rounds (Geographic) 2013 - 2016 Download map
Southern Africa Zambia MDA/PC coverage (Geographic) 2013 Download map
Southern Africa Zambia MDA/PC coverage (Geographic) 2014 Download map
Southern Africa Zambia MDA/PC coverage (Therapeutic) 2015 Download map
Southern Africa Zambia 2017 Download map
Southern Africa Zambia MDA/PC rounds (Geographic) 1990 - 2016 Download map
Southern Africa Zambia MDA/PC coverage (Geographic) 2015 Download map
Southern Africa Zambia MDA/PC coverage (Geographic) 2016 Download map
Southern Africa Zimbabwe 2017 Download map
Southern Africa Zimbabwe MDA/PC coverage (Geographic) 2015 Download map
Southern Africa Zimbabwe MDA/PC coverage (Geographic) 2016 Download map
Southern Africa Zimbabwe MDA/PC rounds (Geographic) 2013 - 2016 Download map
Southern Africa Zimbabwe MDA/PC coverage (Therapeutic) 2013 Download map
Southern Africa Zimbabwe MDA/PC coverage (Therapeutic) 2016 Download map
Southern Africa Zimbabwe MDA/PC coverage (Therapeutic) 2014 Download map
Southern Africa Zimbabwe MDA/PC coverage (Geographic) 2013 Download map
Southern Africa Zimbabwe MDA/PC coverage (Therapeutic) 2015 Download map
Southern Africa Zimbabwe MDA/PC coverage (Geographic) 2014 Download map
Southern Africa Zimbabwe MDA/PC rounds (Geographic) 1990 - 2016 Download map
Southern Africa Zimbabwe MDA/PC rounds (Therapeutic) 2013 - 2016 Download map
Eastern Africa Tanzania (Zanzibar) MDA/PC rounds (Geographic) 1990 - 2016 Download map
Eastern Africa Tanzania (Zanzibar) MDA/PC rounds (Therapeutic) 2013 - 2016 Download map
Eastern Africa Tanzania (Zanzibar) MDA/PC coverage (Geographic) 2013 Download map
Eastern Africa Tanzania (Zanzibar) MDA/PC coverage (Geographic) 2014 Download map
Eastern Africa Tanzania (Zanzibar) MDA/PC coverage (Therapeutic) 2015 Download map
Eastern Africa Tanzania (Zanzibar) MDA/PC coverage (Geographic) 2016 Download map
Eastern Africa Tanzania (Zanzibar) 2017 Download map
Eastern Africa Tanzania (Zanzibar) MDA/PC coverage (Therapeutic) 2016 Download map
Eastern Africa Tanzania (Zanzibar) MDA/PC coverage (Therapeutic) 2014 Download map
Eastern Africa Tanzania (Zanzibar) MDA/PC rounds (Geographic) 2013 - 2016 Download map
Eastern Africa Tanzania (Zanzibar) MDA/PC coverage (Therapeutic) 2013 Download map
Eastern Africa Tanzania (Zanzibar) MDA/PC coverage (Geographic) 2015 Download map

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