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.

90 maps found
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588 maps found
Region Location Program stage Years Maps Data
Central Africa Angola Mapping Surveys (Nodule Palpation) 2002 - 2011 Download map
Eastern Africa South Sudan MDA/PC coverage (Geographic) 2014 Download map
Eastern Africa South Sudan MDA/PC coverage (Geographic) 2015 Download map
Eastern Africa South Sudan MDA/PC coverage (Geographic) 2016 Download map
Eastern Africa South Sudan MDA/PC coverage (Geographic) 2013 Download map
Eastern Africa South Sudan 2017 Download map
Eastern Africa South Sudan MDA/PC rounds (Geographic) 2013 - 2016 Download map
Eastern Africa South Sudan MDA/PC coverage (Therapeutic) 2014 Download map
Eastern Africa South Sudan MDA/PC coverage (Therapeutic) 2016 Download map
Eastern Africa South Sudan MDA/PC coverage (Therapeutic) 2015 Download map
Eastern Africa South Sudan MDA/PC coverage (Therapeutic) 2013 Download map
Eastern Africa South Sudan MDA/PC rounds (Therapeutic) 2013 - 2016 Download map
Eastern Africa Uganda Impact Assessment (Skin Biopsy) Download map
Eastern Africa Uganda Mapping Surveys (Nodule Palpation) 2008 Download map
Western Africa Ghana 2017 Download map
Central Africa Central African Republic Mapping Surveys (Nodule Palpation) 1999 - 2001 Download map
Central Africa Angola Mapping Surveys (Skin Biopsy) 2015 Download map
Central Africa Central African Republic 2017 Download map
Central Africa Central African Republic MDA/PC coverage (Geographic) 2014 Download map
Central Africa Central African Republic MDA/PC coverage (Geographic) 2016 Download map
Central Africa Central African Republic MDA/PC rounds (Geographic) 2013 - 2016 Download map
Central Africa Central African Republic MDA/PC coverage (Geographic) 2015 Download map
Central Africa Central African Republic MDA/PC coverage (Geographic) 2013 Download map
Central Africa Central African Republic MDA/PC coverage (Therapeutic) 2016 Download map
Central Africa Central African Republic MDA/PC rounds (Therapeutic) 2013 - 2016 Download map
Central Africa Central African Republic MDA/PC coverage (Therapeutic) 2014 Download map
Central Africa Central African Republic MDA/PC coverage (Therapeutic) 2015 Download map
Central Africa Central African Republic MDA/PC coverage (Therapeutic) 2013 Download map
Eastern Africa Uganda 2017 Download map
Eastern Africa Kenya MDA/PC coverage (Geographic) 2014 Download map
Eastern Africa Kenya MDA/PC coverage (Geographic) 2015 Download map
Eastern Africa Kenya MDA/PC coverage (Geographic) 2016 Download map
Eastern Africa Kenya 2017 Download map
Eastern Africa Kenya MDA/PC coverage (Geographic) 2013 Download map
Eastern Africa Kenya MDA/PC rounds (Geographic) 2013 - 2016 Download map
Eastern Africa Kenya MDA/PC coverage (Therapeutic) 2015 Download map
Eastern Africa Kenya MDA/PC coverage (Therapeutic) 2016 Download map
Eastern Africa Kenya MDA/PC coverage (Therapeutic) 2014 Download map
Eastern Africa Kenya MDA/PC coverage (Therapeutic) 2013 Download map
Eastern Africa Kenya MDA/PC rounds (Therapeutic) 2013 - 2016 Download map
Western Africa Ghana MDA/PC coverage (Geographic) 2014 Download map
Western Africa Ghana MDA/PC coverage (Geographic) 2013 Download map
Western Africa Ghana MDA/PC coverage (Therapeutic) 2013 Download map
Western Africa Ghana MDA/PC coverage (Therapeutic) 2014 Download map
Western Africa Ghana MDA/PC coverage (Geographic) 2015 Download map
Western Africa Ghana MDA/PC coverage (Geographic) 2016 Download map
Western Africa Ghana MDA/PC coverage (Therapeutic) 2015 Download map
Western Africa Ghana MDA/PC rounds (Geographic) 2013 - 2016 Download map
Western Africa Ghana MDA/PC coverage (Therapeutic) 2016 Download map
Western Africa Ghana MDA/PC rounds (Therapeutic) 2013 - 2016 Download map
Southern Africa South Africa MDA/PC coverage (Geographic) 2014 Download map
Southern Africa South Africa MDA/PC coverage (Geographic) 2015 Download map
Southern Africa South Africa MDA/PC coverage (Geographic) 2016 Download map
Southern Africa South Africa 2017 Download map
Southern Africa South Africa MDA/PC coverage (Geographic) 2013 Download map
Southern Africa South Africa MDA/PC rounds (Geographic) 2013 - 2016 Download map
Southern Africa South Africa MDA/PC coverage (Therapeutic) 2014 Download map
Southern Africa South Africa MDA/PC coverage (Therapeutic) 2015 Download map
Southern Africa South Africa MDA/PC coverage (Therapeutic) 2016 Download map
Southern Africa South Africa MDA/PC coverage (Therapeutic) 2013 Download map
Southern Africa South Africa MDA/PC rounds (Therapeutic) 2013 - 2016 Download map
Eastern Africa Uganda MDA/PC rounds (Geographic) 2013 - 2016 Download map
Eastern Africa Uganda MDA/PC coverage (Geographic) 2014 Download map
Eastern Africa Uganda MDA/PC coverage (Geographic) 2016 Download map
Eastern Africa Uganda MDA/PC coverage (Geographic) 2015 Download map
Eastern Africa Uganda MDA/PC coverage (Therapeutic) 2016 Download map
Eastern Africa Uganda MDA/PC rounds (Therapeutic) 2013 - 2016 Download map
Eastern Africa Uganda MDA/PC coverage (Therapeutic) 2015 Download map
Eastern Africa Uganda MDA/PC coverage (Geographic) 2013 Download map
Eastern Africa Uganda MDA/PC coverage (Therapeutic) 2014 Download map
Eastern Africa Uganda MDA/PC coverage (Therapeutic) 2013 Download map
Central Africa Angola 2017 Download map
Central Africa Angola MDA/PC coverage (Geographic) 2014 Download map
Central Africa Angola MDA/PC coverage (Geographic) 2015 Download map
Central Africa Angola MDA/PC coverage (Geographic) 2013 Download map
Central Africa Angola MDA/PC coverage (Therapeutic) 2014 Download map
Central Africa Angola MDA/PC coverage (Therapeutic) 2015 Download map
Central Africa Angola MDA/PC coverage (Therapeutic) 2016 Download map
Central Africa Angola MDA/PC coverage (Therapeutic) 2013 Download map
Central Africa Angola MDA/PC rounds (Therapeutic) 2013 - 2016 Download map
Central Africa Angola MDA/PC coverage (Geographic) 2016 Download map
Central Africa Angola MDA/PC rounds (Geographic) 2013 - 2016 Download map
Western Africa Nigeria Mapping Surveys (Anti-Ov16 test) 2015 Download map
Western Africa Nigeria Mapping Surveys (Skin Biopsy) 2015 Download map
Eastern Africa Tanzania (Mainland) Mapping Surveys (Skin Biopsy) 2014 Download map
Western Africa Nigeria Impact Assessment (Skin Biopsy) Download map
Eastern Africa Tanzania (Mainland) Impact Assessment (Skin Biopsy) Download map
Eastern Africa Tanzania (Mainland) Mapping Surveys (Nodule Palpation) 1996 - 2012 Download map
Southern Africa Zambia MDA/PC coverage (Geographic) 2014 Download map
Southern Africa Zambia MDA/PC coverage (Geographic) 2015 Download map
Southern Africa Zambia MDA/PC coverage (Geographic) 2016 Download map
Southern Africa Zambia 2017 Download map
Southern Africa Zambia MDA/PC coverage (Geographic) 2013 Download map
Southern Africa Zambia MDA/PC rounds (Geographic) 2013 - 2016 Download map
Southern Africa Zambia MDA/PC coverage (Therapeutic) 2016 Download map
Southern Africa Zambia MDA/PC coverage (Therapeutic) 2015 Download map
Southern Africa Zambia MDA/PC coverage (Therapeutic) 2014 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 Mozambique Mapping Surveys (Nodule Palpation) 2001 - 2007 Download map

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