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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574 maps found
Region Country Program stage Years Maps Data
Central Africa Central African Republic MDA/PC coverage (Therapeutic) 2014 Download map png Download map
Central Africa Central African Republic MDA/PC coverage (Therapeutic) 2015 Download map png Download map
Central Africa Central African Republic MDA/PC coverage (Therapeutic) 2013 Download map png Download map
Eastern Africa Uganda Endemicity 2017 Download map png Download map
Eastern Africa Kenya MDA/PC coverage (Geographic) 2014 Download map png Download map
Eastern Africa Kenya MDA/PC coverage (Geographic) 2015 Download map png Download map
Eastern Africa Kenya MDA/PC coverage (Geographic) 2016 Download map png Download map
Eastern Africa Kenya Endemicity 2017 Download map png Download map
Eastern Africa Kenya MDA/PC coverage (Geographic) 2013 Download map png Download map
Eastern Africa Kenya MDA/PC rounds (Geographic) 2013 - 2016 Download map png Download map
Eastern Africa Kenya MDA/PC coverage (Therapeutic) 2015 Download map png Download map
Eastern Africa Kenya MDA/PC coverage (Therapeutic) 2016 Download map png Download map
Eastern Africa Kenya MDA/PC coverage (Therapeutic) 2014 Download map png Download map
Eastern Africa Kenya MDA/PC coverage (Therapeutic) 2013 Download map png Download map
Eastern Africa Kenya MDA/PC rounds (Therapeutic) 2013 - 2016 Download map png Download map
Western Africa Ghana MDA/PC coverage (Geographic) 2014 Download map png Download map
Western Africa Ghana MDA/PC coverage (Geographic) 2013 Download map png Download map
Western Africa Ghana MDA/PC coverage (Therapeutic) 2013 Download map png Download map
Western Africa Ghana MDA/PC coverage (Therapeutic) 2014 Download map png Download map
Western Africa Ghana MDA/PC coverage (Geographic) 2015 Download map png Download map
Western Africa Ghana MDA/PC coverage (Geographic) 2016 Download map png Download map
Western Africa Ghana MDA/PC coverage (Therapeutic) 2015 Download map png Download map
Western Africa Ghana MDA/PC rounds (Geographic) 2013 - 2016 Download map png Download map
Western Africa Ghana MDA/PC coverage (Therapeutic) 2016 Download map png Download map
Western Africa Ghana MDA/PC rounds (Therapeutic) 2013 - 2016 Download map png Download map
Southern Africa South Africa MDA/PC coverage (Geographic) 2014 Download map png Download map
Southern Africa South Africa MDA/PC coverage (Geographic) 2015 Download map png Download map
Southern Africa South Africa MDA/PC coverage (Geographic) 2016 Download map png Download map
Southern Africa South Africa Endemicity 2017 Download map png Download map
Southern Africa South Africa MDA/PC coverage (Geographic) 2013 Download map png Download map
Southern Africa South Africa MDA/PC rounds (Geographic) 2013 - 2016 Download map png Download map
Southern Africa South Africa MDA/PC coverage (Therapeutic) 2014 Download map png Download map
Southern Africa South Africa MDA/PC coverage (Therapeutic) 2015 Download map png Download map
Southern Africa South Africa MDA/PC coverage (Therapeutic) 2016 Download map png Download map
Southern Africa South Africa MDA/PC coverage (Therapeutic) 2013 Download map png Download map
Southern Africa South Africa MDA/PC rounds (Therapeutic) 2013 - 2016 Download map png Download map
Eastern Africa Uganda MDA/PC rounds (Geographic) 2013 - 2016 Download map png Download map
Eastern Africa Uganda MDA/PC coverage (Geographic) 2014 Download map png Download map
Eastern Africa Uganda MDA/PC coverage (Geographic) 2016 Download map png Download map
Eastern Africa Uganda MDA/PC coverage (Geographic) 2015 Download map png Download map
Eastern Africa Uganda MDA/PC coverage (Geographic) 2013 Download map png Download map
Central Africa Angola Endemicity 2017 Download map png Download map
Central Africa Angola MDA/PC coverage (Geographic) 2014 Download map png Download map
Central Africa Angola MDA/PC coverage (Geographic) 2015 Download map png Download map
Central Africa Angola MDA/PC coverage (Geographic) 2013 Download map png Download map
Central Africa Angola MDA/PC coverage (Therapeutic) 2014 Download map png Download map
Central Africa Angola MDA/PC coverage (Therapeutic) 2015 Download map png Download map
Central Africa Angola MDA/PC coverage (Therapeutic) 2016 Download map png Download map
Central Africa Angola MDA/PC coverage (Therapeutic) 2013 Download map png Download map
Central Africa Angola MDA/PC rounds (Therapeutic) 2013 - 2016 Download map png Download map
Central Africa Angola MDA/PC coverage (Geographic) 2016 Download map png Download map
Central Africa Angola MDA/PC rounds (Geographic) 2013 - 2016 Download map png Download map
Western Africa Nigeria Mapping Surveys (Anti-Ov16 test) 2015 Download map png Download map
Western Africa Nigeria Mapping Surveys (Skin Biopsy) 2015 Download map png Download map
Eastern Africa Tanzania (Mainland) Mapping Surveys (Skin Biopsy) 2014 Download map png Download map
Western Africa Nigeria Impact Assessment (Skin Biopsy) Download map png Download map
Eastern Africa Tanzania (Mainland) Impact Assessment (Skin Biopsy) Download map png Download map
Eastern Africa Tanzania (Mainland) Mapping Surveys (Nodule Palpation) 1996 - 2012 Download map png Download map
Southern Africa Zambia MDA/PC coverage (Geographic) 2014 Download map png Download map
Southern Africa Zambia MDA/PC coverage (Geographic) 2015 Download map png Download map
Southern Africa Zambia MDA/PC coverage (Geographic) 2016 Download map png Download map
Southern Africa Zambia Endemicity 2017 Download map png Download map
Southern Africa Zambia MDA/PC coverage (Geographic) 2013 Download map png Download map
Southern Africa Zambia MDA/PC rounds (Geographic) 2013 - 2016 Download map png Download map
Southern Africa Zambia MDA/PC coverage (Therapeutic) 2016 Download map png Download map
Southern Africa Zambia MDA/PC coverage (Therapeutic) 2015 Download map png Download map
Southern Africa Zambia MDA/PC coverage (Therapeutic) 2014 Download map png Download map
Southern Africa Zambia MDA/PC coverage (Therapeutic) 2013 Download map png Download map
Southern Africa Zambia MDA/PC rounds (Therapeutic) 2013 - 2016 Download map png Download map
Southern Africa Mozambique Mapping Surveys (Nodule Palpation) 2001 - 2007 Download map png Download map
Western Africa Nigeria Mapping Surveys (Nodule Palpation) 1989 - 2011 Download map png Download map
Mali Endemicity 2017 Download map png Download map
Mali MDA/PC coverage (Geographic) 2015 Download map png Download map
Mali MDA/PC rounds (Therapeutic) 2013 - 2016 Download map png Download map
Mali MDA/PC coverage (Therapeutic) 2016 Download map png Download map
Mali MDA/PC coverage (Geographic) 2014 Download map png Download map
Mali MDA/PC coverage (Therapeutic) 2015 Download map png Download map
Mali MDA/PC rounds (Geographic) 2013 - 2016 Download map png Download map
Mali MDA/PC coverage (Geographic) 2016 Download map png Download map
Mali MDA/PC coverage (Geographic) 2013 Download map png Download map
Mali MDA/PC coverage (Therapeutic) 2014 Download map png Download map
Mali MDA/PC coverage (Therapeutic) 2013 Download map png Download map
Eastern Africa Tanzania (Mainland) Endemicity 2017 Download map png Download map
Eastern Africa Uganda MDA/PC coverage (Therapeutic) 2016 Download map png Download map
Eastern Africa Uganda MDA/PC coverage (Therapeutic) 2013 Download map png Download map
Eastern Africa Uganda MDA/PC coverage (Therapeutic) 2015 Download map png Download map
Southern Africa Mozambique Endemicity 2017 Download map png Download map
Eastern Africa Uganda MDA/PC rounds (Therapeutic) 2013 - 2016 Download map png Download map
Eastern Africa Uganda MDA/PC coverage (Therapeutic) 2014 Download map png Download map
Western Africa Nigeria Endemicity 2017 Download map png Download map
Central Africa Chad Mapping Surveys (Nodule Palpation) 2013 Download map png Download map
Central Africa Chad Mapping Surveys (Skin Biopsy) 2013 - 2014 Download map png Download map
Eastern Africa Ethiopia Impact Assessment (Skin Biopsy) Download map png Download map
Central Africa Chad Impact Assessment (Skin Biopsy) Download map png Download map
Eastern Africa Ethiopia Mapping Surveys (Skin Biopsy) 2012 - 2014 Download map png Download map
Eastern Africa Ethiopia Mapping Surveys (Nodule Palpation) 2001 - 2012 Download map png Download map
Central Africa Chad Endemicity 2017 Download map png Download map
Central Africa Chad MDA/PC coverage (Geographic) 2015 Download map png Download map
Central Africa Chad MDA/PC coverage (Geographic) 2014 Download map png Download map
Central Africa Chad MDA/PC rounds (Geographic) 2013 - 2016 Download map png Download map

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