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
Region Program stage Years Maps Data
WHO African Region (AFRO) MDA/PC rounds (Therapeutic) 2013 - 2016 Download map
WHO African Region (AFRO) MDA/PC coverage (Therapeutic) 2016 Download map
Africa Continent MDA/PC rounds (Therapeutic) 2013 - 2016 Download map
WHO African Region (AFRO) MDA/PC coverage (Therapeutic) 2015 Download map
WHO African Region (AFRO) MDA/PC coverage (Therapeutic) 2014 Download map
WHO African Region (AFRO) MDA/PC coverage (Geographic) 2014 Download map
WHO African Region (AFRO) MDA/PC coverage (Geographic) 2016 Download map
WHO African Region (AFRO) MDA/PC coverage (Geographic) 2015 Download map
WHO African Region (AFRO) 2017 Download map
WHO African Region (AFRO) MDA/PC coverage (Therapeutic) 2013 Download map
WHO African Region (AFRO) MDA/PC coverage (Geographic) 2013 Download map
Africa Continent MDA/PC coverage (Therapeutic) 2016 Download map
Africa Continent MDA/PC coverage (Therapeutic) 2015 Download map
Africa Continent MDA/PC coverage (Therapeutic) 2014 Download map
Africa Continent MDA/PC coverage (Geographic) 2014 Download map
Africa Continent MDA/PC coverage (Geographic) 2016 Download map
Africa Continent MDA/PC coverage (Geographic) 2015 Download map
Africa Continent 2017 Download map
Africa Continent MDA/PC coverage (Therapeutic) 2013 Download map
Africa Continent MDA/PC coverage (Geographic) 2013 Download map
Central Africa MDA/PC rounds (Therapeutic) 2013 - 2016 Download map
Central Africa MDA/PC coverage (Therapeutic) 2016 Download map
Central Africa MDA/PC coverage (Therapeutic) 2015 Download map
Central Africa MDA/PC coverage (Therapeutic) 2014 Download map
Central Africa MDA/PC coverage (Therapeutic) 2013 Download map
Central Africa MDA/PC coverage (Geographic) 2016 Download map
Central Africa MDA/PC coverage (Geographic) 2014 Download map
Central Africa MDA/PC coverage (Geographic) 2015 Download map
Central Africa MDA/PC coverage (Geographic) 2013 Download map
Central Africa 2017 Download map
Eastern Africa MDA/PC rounds (Therapeutic) 2013 - 2016 Download map
Eastern Africa MDA/PC coverage (Therapeutic) 2015 Download map
Eastern Africa MDA/PC coverage (Therapeutic) 2016 Download map
Eastern Africa MDA/PC coverage (Therapeutic) 2014 Download map
Eastern Africa MDA/PC coverage (Geographic) 2015 Download map
Eastern Africa MDA/PC coverage (Geographic) 2016 Download map
Eastern Africa MDA/PC coverage (Geographic) 2014 Download map
Eastern Africa MDA/PC coverage (Therapeutic) 2013 Download map
Eastern Africa MDA/PC coverage (Geographic) 2013 Download map
Eastern Africa 2017 Download map
Central Africa Mapping Surveys (Nodule Palpation) 1989 - 2014 Download map
Southern Africa 2017 Download map
Western Africa MDA/PC rounds (Therapeutic) 2013 - 2016 Download map
Western Africa MDA/PC coverage (Therapeutic) 2016 Download map
Western Africa MDA/PC coverage (Therapeutic) 2015 Download map
Southern Africa MDA/PC rounds (Therapeutic) 2013 - 2016 Download map
Western Africa MDA/PC coverage (Therapeutic) 2014 Download map
Western Africa 2017 Download map
Western Africa MDA/PC coverage (Geographic) 2014 Download map
Western Africa MDA/PC coverage (Geographic) 2015 Download map
Western Africa MDA/PC coverage (Therapeutic) 2013 Download map
Southern Africa MDA/PC coverage (Therapeutic) 2016 Download map
Southern Africa MDA/PC coverage (Therapeutic) 2014 Download map
Western Africa MDA/PC coverage (Geographic) 2013 Download map
Southern Africa MDA/PC coverage (Therapeutic) 2013 Download map
Western Africa MDA/PC coverage (Geographic) 2016 Download map
Southern Africa MDA/PC coverage (Geographic) 2013 Download map
Southern Africa MDA/PC coverage (Geographic) 2016 Download map
Southern Africa MDA/PC coverage (Geographic) 2014 Download map
Southern Africa MDA/PC coverage (Therapeutic) 2015 Download map
Southern Africa MDA/PC coverage (Geographic) 2015 Download map
WHO African Region (AFRO) Mapping Surveys (Nodule Palpation) 1989 - 2014 Download map
Africa Continent Mapping Surveys (Nodule Palpation) 1989 - 2014 Download map
Central Africa Mapping Surveys (Skin Biopsy) 2012 - 2015 Download map
Eastern Africa Mapping Surveys (Nodule Palpation) 1989 - 2014 Download map
Central Africa Impact Assessment (Skin Biopsy) Download map
Central Africa Mapping Surveys (Anti-Ov16 test) 2015 Download map
Western Africa Mapping Surveys (Nodule Palpation) 1989 - 2014 Download map
WHO African Region (AFRO) Mapping Surveys (Skin Biopsy) 2012 - 2015 Download map
Africa Continent Mapping Surveys (Skin Biopsy) 2012 - 2015 Download map
WHO African Region (AFRO) Impact Assessment (Skin Biopsy) Download map
Africa Continent Impact Assessment (Skin Biopsy) Download map
Eastern Africa Mapping Surveys (Skin Biopsy) 2012 - 2015 Download map
WHO African Region (AFRO) Mapping Surveys (Anti-Ov16 test) 2015 Download map
Eastern Africa Impact Assessment (Skin Biopsy) Download map
Southern Africa Mapping Surveys (Nodule Palpation) 1989 - 2014 Download map
Africa Continent Mapping Surveys (Anti-Ov16 test) 2015 Download map
Eastern Africa Mapping Surveys (Anti-Ov16 test) 2015 Download map
Southern Africa Mapping Surveys (Skin Biopsy) 2012 - 2015 Download map
Southern Africa Mapping Surveys (Anti-Ov16 test) 2015 Download map
Southern Africa Impact Assessment (Skin Biopsy) Download map
Western Africa Impact Assessment (Skin Biopsy) Download map
Western Africa Mapping Surveys (Skin Biopsy) 2012 - 2015 Download map
Western Africa Mapping Surveys (Anti-Ov16 test) 2015 Download map
WHO African Region (AFRO) MDA/PC rounds (Geographic) 1990 - 2016 Download map
Southern Africa MDA/PC rounds (Geographic) 1990 - 2016 Download map
Western Africa MDA/PC rounds (Geographic) 1990 - 2016 Download map
Africa Continent MDA/PC rounds (Geographic) 1990 - 2016 Download map
Central Africa MDA/PC rounds (Geographic) 1990 - 2016 Download map
Eastern Africa MDA/PC rounds (Geographic) 1990 - 2016 Download map
588 maps found
Region Location Program stage Years Maps Data
Central Africa Democratic Republic of the Congo MDA/PC coverage (Therapeutic) 2016 Download map
Central Africa Democratic Republic of the Congo MDA/PC coverage (Geographic) 2016 Download map
Central Africa Democratic Republic of the Congo MDA/PC coverage (Therapeutic) 2013 Download map
Central Africa Democratic Republic of the Congo MDA/PC rounds (Therapeutic) 2013 - 2016 Download map
Central Africa Democratic Republic of the Congo MDA/PC coverage (Therapeutic) 2015 Download map
Central Africa Democratic Republic of the Congo MDA/PC coverage (Geographic) 2015 Download map
Central Africa Democratic Republic of the Congo MDA/PC coverage (Therapeutic) 2014 Download map
Central Africa Democratic Republic of the Congo MDA/PC rounds (Geographic) 2013 - 2016 Download map
Central Africa Democratic Republic of the Congo MDA/PC coverage (Geographic) 2013 Download map
Central Africa Democratic Republic of the Congo MDA/PC coverage (Geographic) 2014 Download map
Central Africa Democratic Republic of the Congo 2017 Download map
Central Africa Democratic Republic of the Congo Mapping Surveys (Nodule Palpation) 2000 - 2014 Download map
Central Africa Democratic Republic of the Congo Mapping Surveys (Skin Biopsy) 2014 - 2015 Download map
Central Africa Democratic Republic of the Congo Mapping Surveys (Anti-Ov16 test) 2015 Download map
Central Africa Democratic Republic of the Congo Impact Assessment (Skin Biopsy) Download map
Western Africa Burkina Faso MDA/PC coverage (Therapeutic) 2013 Download map
Western Africa Burkina Faso MDA/PC rounds (Therapeutic) 2013 - 2016 Download map
Western Africa Burkina Faso MDA/PC coverage (Geographic) 2013 Download map
Western Africa Burkina Faso MDA/PC rounds (Geographic) 2013 - 2016 Download map
Western Africa Burkina Faso MDA/PC coverage (Geographic) 2014 Download map
Western Africa Burkina Faso MDA/PC coverage (Therapeutic) 2014 Download map
Western Africa Burkina Faso MDA/PC coverage (Therapeutic) 2015 Download map
Western Africa Burkina Faso MDA/PC coverage (Geographic) 2015 Download map
Western Africa Burkina Faso MDA/PC coverage (Geographic) 2016 Download map
Western Africa Burkina Faso MDA/PC coverage (Therapeutic) 2016 Download map
Eastern Africa Ethiopia MDA/PC coverage (Therapeutic) 2014 Download map
Eastern Africa Ethiopia MDA/PC rounds (Therapeutic) 2013 - 2016 Download map
Eastern Africa Ethiopia MDA/PC coverage (Therapeutic) 2013 Download map
Eastern Africa Ethiopia MDA/PC coverage (Geographic) 2013 Download map
Eastern Africa Ethiopia MDA/PC coverage (Therapeutic) 2015 Download map
Eastern Africa Ethiopia MDA/PC coverage (Therapeutic) 2016 Download map
Eastern Africa Ethiopia MDA/PC coverage (Geographic) 2015 Download map
Eastern Africa Ethiopia MDA/PC coverage (Geographic) 2014 Download map
Eastern Africa Ethiopia MDA/PC rounds (Geographic) 2013 - 2016 Download map
Eastern Africa Ethiopia MDA/PC coverage (Geographic) 2016 Download map
Eastern Africa Ethiopia 2017 Download map
Western Africa Burkina Faso 2017 Download map
Western Africa Nigeria MDA/PC rounds (Therapeutic) 2013 - 2016 Download map
Western Africa Nigeria MDA/PC coverage (Therapeutic) 2014 Download map
Western Africa Nigeria MDA/PC coverage (Therapeutic) 2015 Download map
Western Africa Nigeria MDA/PC coverage (Therapeutic) 2016 Download map
Western Africa Nigeria MDA/PC coverage (Therapeutic) 2013 Download map
Western Africa Nigeria MDA/PC rounds (Geographic) 2013 - 2016 Download map
Western Africa Nigeria MDA/PC coverage (Geographic) 2015 Download map
Western Africa Nigeria MDA/PC coverage (Geographic) 2014 Download map
Western Africa Nigeria MDA/PC coverage (Geographic) 2013 Download map
Western Africa Nigeria MDA/PC coverage (Geographic) 2016 Download map
Southern Africa Mozambique MDA/PC coverage (Therapeutic) 2013 Download map
Southern Africa Mozambique MDA/PC rounds (Therapeutic) 2013 - 2016 Download map
Southern Africa Mozambique MDA/PC coverage (Therapeutic) 2014 Download map
Southern Africa Mozambique MDA/PC rounds (Geographic) 2013 - 2016 Download map
Southern Africa Mozambique MDA/PC coverage (Geographic) 2013 Download map
Southern Africa Mozambique MDA/PC coverage (Therapeutic) 2016 Download map
Southern Africa Mozambique MDA/PC coverage (Geographic) 2014 Download map
Southern Africa Mozambique MDA/PC coverage (Therapeutic) 2015 Download map
Southern Africa Mozambique MDA/PC coverage (Geographic) 2016 Download map
Southern Africa Mozambique MDA/PC coverage (Geographic) 2015 Download map
Eastern Africa Tanzania (Mainland) MDA/PC coverage (Therapeutic) 2015 Download map
Eastern Africa Tanzania (Mainland) MDA/PC rounds (Therapeutic) 2013 - 2016 Download map
Eastern Africa Tanzania (Mainland) MDA/PC coverage (Therapeutic) 2016 Download map
Eastern Africa Tanzania (Mainland) MDA/PC coverage (Therapeutic) 2014 Download map
Eastern Africa Tanzania (Mainland) MDA/PC coverage (Geographic) 2016 Download map
Eastern Africa Tanzania (Mainland) MDA/PC coverage (Geographic) 2015 Download map
Eastern Africa Tanzania (Mainland) MDA/PC rounds (Geographic) 2013 - 2016 Download map
Eastern Africa Tanzania (Mainland) MDA/PC coverage (Geographic) 2014 Download map
Eastern Africa Tanzania (Mainland) MDA/PC coverage (Therapeutic) 2013 Download map
Eastern Africa Tanzania (Mainland) MDA/PC coverage (Geographic) 2013 Download map
Central Africa Chad MDA/PC coverage (Therapeutic) 2013 Download map
Central Africa Chad MDA/PC coverage (Therapeutic) 2015 Download map
Central Africa Chad MDA/PC coverage (Geographic) 2013 Download map
Central Africa Chad MDA/PC coverage (Geographic) 2016 Download map
Central Africa Chad MDA/PC rounds (Therapeutic) 2013 - 2016 Download map
Central Africa Chad MDA/PC coverage (Therapeutic) 2014 Download map
Central Africa Chad MDA/PC coverage (Therapeutic) 2016 Download map
Central Africa Chad MDA/PC rounds (Geographic) 2013 - 2016 Download map
Central Africa Chad MDA/PC coverage (Geographic) 2014 Download map
Central Africa Chad MDA/PC coverage (Geographic) 2015 Download map
Central Africa Chad 2017 Download map
Eastern Africa Ethiopia Mapping Surveys (Nodule Palpation) 2001 - 2012 Download map
Eastern Africa Ethiopia Mapping Surveys (Skin Biopsy) 2012 - 2014 Download map
Central Africa Chad Impact Assessment (Skin Biopsy) Download map
Eastern Africa Ethiopia Impact Assessment (Skin Biopsy) Download map
Central Africa Chad Mapping Surveys (Skin Biopsy) 2013 - 2014 Download map
Central Africa Chad Mapping Surveys (Nodule Palpation) 2013 Download map
Western Africa Nigeria 2017 Download map
Southern Africa Mozambique 2017 Download map
Eastern Africa Tanzania (Mainland) 2017 Download map
Western Africa Nigeria Mapping Surveys (Nodule Palpation) 1989 - 2011 Download map
Southern Africa Mozambique Mapping Surveys (Nodule Palpation) 2001 - 2007 Download map
Southern Africa Zambia MDA/PC rounds (Therapeutic) 2013 - 2016 Download map
Southern Africa Zambia MDA/PC coverage (Therapeutic) 2013 Download map
Southern Africa Zambia MDA/PC coverage (Therapeutic) 2014 Download map
Southern Africa Zambia MDA/PC coverage (Therapeutic) 2015 Download map
Southern Africa Zambia MDA/PC coverage (Therapeutic) 2016 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 2017 Download map
Southern Africa Zambia MDA/PC coverage (Geographic) 2016 Download map
Southern Africa Zambia MDA/PC coverage (Geographic) 2015 Download map
Southern Africa Zambia MDA/PC coverage (Geographic) 2014 Download map

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