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
Regionsort descending Program stage Years Maps Data
Western Africa Endemicity 2017 Download map png
Western Africa Mapping Surveys (Nodule Palpation) 1989 - 2014 Download map png
Western Africa MDA/PC coverage (Geographic coverage) 2013 Download map png
Western Africa MDA/PC coverage (Therapeutic coverage) 2013 Download map png
Western Africa MDA/PC coverage (Therapeutic coverage) 2014 Download map png
Western Africa MDA/PC coverage (Therapeutic coverage) 2016 Download map png
Western Africa MDA/PC coverage (Therapeutic coverage) 2015 Download map png
Western Africa MDA/PC coverage (Geographic coverage) 2016 Download map png
Western Africa MDA/PC coverage (Geographic coverage) 2015 Download map png
Western Africa Mapping Surveys (Skin Biopsy) 2014 - 2015 Download map png
Western Africa MDA/PC coverage (Geographic coverage) 2014 Download map png
Western Africa Impact Assessment (Skin Biopsy) Download map png
Western Africa MDA/PC rounds (Therapeutic coverage) 2013 - 2016 Download map png
Southern Africa MDA/PC coverage (Geographic coverage) 2015 Download map png
Southern Africa MDA/PC coverage (Therapeutic coverage) 2014 Download map png
Southern Africa MDA/PC coverage (Geographic coverage) 2016 Download map png
Southern Africa MDA/PC coverage (Geographic coverage) 2013 Download map png
Southern Africa Impact Assessment (Skin Biopsy) Download map png
Southern Africa MDA/PC rounds (Therapeutic coverage) 2013 - 2016 Download map png
Southern Africa Endemicity 2017 Download map png
Southern Africa Mapping Surveys (Nodule Palpation) 1998 - 2007 Download map png
Southern Africa MDA/PC coverage (Therapeutic coverage) 2015 Download map png
Southern Africa MDA/PC coverage (Therapeutic coverage) 2016 Download map png
Southern Africa MDA/PC coverage (Geographic coverage) 2014 Download map png
Southern Africa MDA/PC coverage (Therapeutic coverage) 2013 Download map png
Central Africa MDA/PC coverage (Geographic coverage) 2014 Download map png
Central Africa MDA/PC coverage (Therapeutic coverage) 2014 Download map png
Central Africa Impact Assessment (Skin Biopsy) Download map png
Central Africa MDA/PC coverage (Geographic coverage) 2015 Download map png
Central Africa Endemicity 2017 Download map png
Central Africa MDA/PC coverage (Therapeutic coverage) 2015 Download map png
Central Africa MDA/PC coverage (Geographic coverage) 2016 Download map png
Central Africa Mapping Surveys (Nodule Palpation) 1989 - 2011 Download map png
Central Africa MDA/PC coverage (Therapeutic coverage) 2016 Download map png
Central Africa MDA/PC coverage (Geographic coverage) 2013 Download map png
Central Africa MDA/PC rounds (Therapeutic coverage) 2013 - 2016 Download map png
Central Africa Mapping Surveys (Skin Biopsy) 2014 - 2015 Download map png
Central Africa MDA/PC coverage (Therapeutic coverage) 2013 Download map png
Eastern Africa Impact Assessment (Skin Biopsy) Download map png
Eastern Africa MDA/PC coverage (Therapeutic coverage) 2013 Download map png
Eastern Africa Endemicity 2017 Download map png
Eastern Africa MDA/PC coverage (Therapeutic coverage) 2015 Download map png
Eastern Africa Mapping Surveys (Skin Biopsy) 2012 - 2014 Download map png
Eastern Africa MDA/PC coverage (Therapeutic coverage) 2014 Download map png
Eastern Africa MDA/PC coverage (Geographic coverage) 2016 Download map png
Eastern Africa Mapping Surveys (Nodule Palpation) 1996 - 2012 Download map png
Eastern Africa MDA/PC coverage (Geographic coverage) 2013 Download map png
Eastern Africa MDA/PC coverage (Geographic coverage) 2014 Download map png
Eastern Africa MDA/PC rounds (Therapeutic coverage) 2013 - 2016 Download map png
Eastern Africa MDA/PC coverage (Geographic coverage) 2015 Download map png
Eastern Africa MDA/PC coverage (Therapeutic coverage) 2016 Download map png
WHO African Region (AFRO) Mapping Surveys (Nodule Palpation) 1989 - 2014 Download map png
WHO African Region (AFRO) MDA/PC coverage (Therapeutic coverage) 2013 Download map png
WHO African Region (AFRO) MDA/PC coverage (Therapeutic coverage) 2015 Download map png
WHO African Region (AFRO) MDA/PC coverage (Therapeutic coverage) 2014 Download map png
WHO African Region (AFRO) MDA/PC coverage (Geographic coverage) 2015 Download map png
WHO African Region (AFRO) Mapping Surveys (Skin Biopsy) 2012 - 2015 Download map png
WHO African Region (AFRO) MDA/PC coverage (Geographic coverage) 2016 Download map png
WHO African Region (AFRO) MDA/PC rounds (Therapeutic coverage) 2013 - 2016 Download map png
WHO African Region (AFRO) Impact Assessment (Skin Biopsy) Download map png
WHO African Region (AFRO) Endemicity 2017 Download map png
WHO African Region (AFRO) MDA/PC coverage (Therapeutic coverage) 2016 Download map png
WHO African Region (AFRO) MDA/PC coverage (Geographic coverage) 2014 Download map png
Africa Continent MDA/PC coverage (Therapeutic coverage) 2013 Download map png
Africa Continent MDA/PC rounds (Therapeutic coverage) 2013 - 2016 Download map png
Africa Continent MDA/PC coverage (Therapeutic coverage) 2014 Download map png
Africa Continent Mapping Surveys (Nodule Palpation) 1989 - 2014 Download map png
Africa Continent MDA/PC coverage (Therapeutic coverage) 2016 Download map png
Africa Continent MDA/PC coverage (Therapeutic coverage) 2015 Download map png
Africa Continent MDA/PC coverage (Geographic coverage) 2014 Download map png
Africa Continent Mapping Surveys (Skin Biopsy) 2012 - 2015 Download map png
Africa Continent MDA/PC coverage (Geographic coverage) 2015 Download map png
Africa Continent Impact Assessment (Skin Biopsy) Download map png
Africa Continent MDA/PC coverage (Geographic coverage) 2016 Download map png
Africa Continent Endemicity 2017 Download map png
Africa Continent MDA/PC coverage (Geographic coverage) 2013 Download map png
550 maps found
Regionsort descending Location Program stage Years Maps Data
Mauritius Endemicity 2017 Download map png Download map
Mauritius MDA/PC coverage (Geographic coverage) 2013 Download map png Download map
Eritrea MDA/PC coverage (Geographic coverage) 2014 Download map png Download map
Mauritius MDA/PC coverage (Geographic coverage) 2014 Download map png Download map
Eritrea MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Mauritius MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Mauritius MDA/PC coverage (Geographic coverage) 2016 Download map png Download map
Eritrea Endemicity 2017 Download map png Download map
Eritrea MDA/PC coverage (Geographic coverage) 2016 Download map png Download map
Eritrea MDA/PC coverage (Geographic coverage) 2013 Download map png Download map
Western Africa Mauritania MDA/PC coverage (Geographic coverage) 2016 Download map png Download map
Western Africa Senegal MDA/PC rounds (Therapeutic coverage) 2013 - 2016 Download map png Download map
Western Africa The Gambia MDA/PC coverage (Geographic coverage) 2014 Download map png Download map
Western Africa Guinea MDA/PC coverage (Geographic coverage) 2016 Download map png Download map
Western Africa Mauritania Endemicity 2017 Download map png Download map
Western Africa Senegal MDA/PC coverage (Therapeutic coverage) 2013 Download map png Download map
Western Africa Niger MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Western Africa Algeria MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Western Africa Guinea-Bissau Endemicity 2017 Download map png Download map
Western Africa Cote d’Ivoire Endemicity 2017 Download map png Download map
Western Africa Benin MDA/PC rounds (Geographic coverage) 2013 - 2016 Download map png Download map
Western Africa Ghana MDA/PC coverage (Geographic coverage) 2014 Download map png Download map
Western Africa Niger MDA/PC rounds (Geographic coverage) 2013 - 2016 Download map png Download map
Western Africa Sierra Leone MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Western Africa Burkina Faso Endemicity 2017 Download map png Download map
Western Africa Mali MDA/PC coverage (Therapeutic coverage) 2013 Download map png Download map
Western Africa Senegal MDA/PC coverage (Therapeutic coverage) 2016 Download map png Download map
Western Africa Cote d’Ivoire MDA/PC rounds (Geographic coverage) 2013 - 2016 Download map png Download map
Western Africa Ghana MDA/PC coverage (Therapeutic coverage) 2015 Download map png Download map
Western Africa Togo MDA/PC coverage (Therapeutic coverage) 2013 Download map png Download map
Western Africa Mali MDA/PC rounds (Therapeutic coverage) 2013 - 2016 Download map png Download map
Western Africa Togo MDA/PC coverage (Geographic coverage) 2013 Download map png Download map
Western Africa Niger MDA/PC coverage (Therapeutic coverage) 2015 Download map png Download map
Western Africa Togo MDA/PC rounds (Geographic coverage) 2013 - 2016 Download map png Download map
Western Africa Sierra Leone MDA/PC coverage (Therapeutic coverage) 2013 Download map png Download map
Western Africa Burkina Faso MDA/PC coverage (Therapeutic coverage) 2013 Download map png Download map
Western Africa Liberia Mapping Surveys (Nodule Palpation) 1998 Download map png Download map
Western Africa Ghana MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Western Africa Nigeria Endemicity 2017 Download map png Download map
Western Africa Mauritania MDA/PC coverage (Therapeutic coverage) 2013 Download map png Download map
Western Africa Niger MDA/PC rounds (Therapeutic coverage) 2013 - 2016 Download map png Download map
Western Africa Guinea-Bissau MDA/PC coverage (Therapeutic coverage) 2013 Download map png Download map
Western Africa Algeria MDA/PC coverage (Therapeutic coverage) 2014 Download map png Download map
Western Africa Nigeria MDA/PC rounds (Therapeutic coverage) 2013 - 2016 Download map png Download map
Western Africa Togo MDA/PC coverage (Therapeutic coverage) 2014 Download map png Download map
Western Africa Burkina Faso MDA/PC rounds (Therapeutic coverage) 2013 - 2016 Download map png Download map
Western Africa The Gambia MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Western Africa Guinea MDA/PC coverage (Geographic coverage) 2013 Download map png Download map
Western Africa Burkina Faso MDA/PC coverage (Geographic coverage) 2016 Download map png Download map
Western Africa Senegal MDA/PC rounds (Geographic coverage) 2013 - 2016 Download map png Download map
Western Africa Senegal MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Western Africa Algeria Endemicity 2017 Download map png Download map
Western Africa Senegal MDA/PC coverage (Therapeutic coverage) 2014 Download map png Download map
Western Africa Benin MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Western Africa Nigeria MDA/PC coverage (Geographic coverage) 2014 Download map png Download map
Western Africa The Gambia Endemicity 2017 Download map png Download map
Western Africa Liberia MDA/PC rounds (Geographic coverage) 2013 - 2016 Download map png Download map
Western Africa Cape Verde MDA/PC coverage (Therapeutic coverage) 2013 Download map png Download map
Western Africa Ghana MDA/PC coverage (Geographic coverage) 2016 Download map png Download map
Western Africa Togo MDA/PC coverage (Geographic coverage) 2014 Download map png Download map
Western Africa Nigeria MDA/PC rounds (Geographic coverage) 2013 - 2016 Download map png Download map
Western Africa Niger MDA/PC coverage (Therapeutic coverage) 2013 Download map png Download map
Western Africa Mauritania MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Western Africa Cape Verde MDA/PC coverage (Therapeutic coverage) 2015 Download map png Download map
Western Africa Liberia Impact Assessment (Skin Biopsy) Download map png Download map
Western Africa Nigeria MDA/PC coverage (Therapeutic coverage) 2013 Download map png Download map
Western Africa Ghana MDA/PC rounds (Geographic coverage) 2013 - 2016 Download map png Download map
Western Africa Mauritania MDA/PC coverage (Therapeutic coverage) 2014 Download map png Download map
Western Africa Burkina Faso MDA/PC coverage (Therapeutic coverage) 2015 Download map png Download map
Western Africa Algeria MDA/PC rounds (Therapeutic coverage) 2013 - 2016 Download map png Download map
Western Africa Cape Verde MDA/PC coverage (Geographic coverage) 2014 Download map png Download map
Western Africa Senegal MDA/PC coverage (Geographic coverage) 2016 Download map png Download map
Western Africa Cote d’Ivoire MDA/PC coverage (Therapeutic coverage) 2016 Download map png Download map
Western Africa Guinea-Bissau MDA/PC rounds (Therapeutic coverage) 2013 - 2016 Download map png Download map
Western Africa Cote d’Ivoire MDA/PC coverage (Therapeutic coverage) 2014 Download map png Download map
Western Africa Burkina Faso MDA/PC coverage (Geographic coverage) 2013 Download map png Download map
Western Africa Nigeria Impact Assessment (Skin Biopsy) Download map png Download map
Western Africa Guinea-Bissau MDA/PC coverage (Therapeutic coverage) 2015 Download map png Download map
Western Africa Mauritania MDA/PC rounds (Geographic coverage) 2013 - 2016 Download map png Download map
Western Africa Guinea MDA/PC rounds (Therapeutic coverage) 2013 - 2016 Download map png Download map
Western Africa Benin MDA/PC coverage (Geographic coverage) 2016 Download map png Download map
Western Africa Cape Verde MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Western Africa Sierra Leone Endemicity 2017 Download map png Download map
Western Africa Ghana MDA/PC coverage (Therapeutic coverage) 2013 Download map png Download map
Western Africa Togo MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Western Africa Guinea MDA/PC coverage (Therapeutic coverage) 2013 Download map png Download map
Western Africa Sierra Leone MDA/PC rounds (Geographic coverage) 2013 - 2016 Download map png Download map
Western Africa Cape Verde MDA/PC coverage (Therapeutic coverage) 2014 Download map png Download map
Western Africa Cote d’Ivoire MDA/PC coverage (Geographic coverage) 2014 Download map png Download map
Western Africa Algeria MDA/PC rounds (Geographic coverage) 2013 - 2016 Download map png Download map
Western Africa Sierra Leone MDA/PC coverage (Geographic coverage) 2016 Download map png Download map
Western Africa Mauritania MDA/PC rounds (Therapeutic coverage) 2013 - 2016 Download map png Download map
Western Africa Algeria MDA/PC coverage (Geographic coverage) 2014 Download map png Download map
Western Africa Sierra Leone MDA/PC coverage (Therapeutic coverage) 2014 Download map png Download map
Western Africa Mali MDA/PC coverage (Geographic coverage) 2014 Download map png Download map
Western Africa Liberia MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Western Africa Algeria MDA/PC coverage (Geographic coverage) 2013 Download map png Download map
Western Africa Niger MDA/PC coverage (Geographic coverage) 2013 Download map png Download map
Western Africa Mali Endemicity 2017 Download map png Download map
Western Africa Guinea MDA/PC coverage (Therapeutic coverage) 2015 Download map png Download map

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