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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550 maps found
Regionsort descending Country Program stage Years Maps Data
Western Africa Mauritania MDA/PC coverage (Therapeutic coverage) 2016 Download map png Download map
Western Africa Nigeria MDA/PC coverage (Therapeutic coverage) 2015 Download map png Download map
Western Africa Nigeria MDA/PC coverage (Geographic coverage) 2016 Download map png Download map
Western Africa Cote d’Ivoire MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Western Africa Benin MDA/PC coverage (Geographic coverage) 2013 Download map png Download map
Western Africa Algeria MDA/PC coverage (Geographic coverage) 2016 Download map png Download map
Western Africa Sierra Leone MDA/PC rounds (Therapeutic coverage) 2013 - 2016 Download map png Download map
Western Africa Ghana Endemicity 2017 Download map png Download map
Western Africa Ghana MDA/PC coverage (Geographic coverage) 2013 Download map png Download map
Western Africa Mali MDA/PC coverage (Therapeutic coverage) 2014 Download map png Download map
Western Africa The Gambia MDA/PC rounds (Geographic coverage) 2013 - 2016 Download map png Download map
Western Africa The Gambia MDA/PC rounds (Therapeutic coverage) 2013 - 2016 Download map png Download map
Western Africa Niger MDA/PC coverage (Geographic coverage) 2014 Download map png Download map
Western Africa Cape Verde MDA/PC coverage (Geographic coverage) 2016 Download map png Download map
Western Africa Cape Verde MDA/PC coverage (Geographic coverage) 2013 Download map png Download map
Western Africa Niger MDA/PC coverage (Therapeutic coverage) 2014 Download map png Download map
Western Africa Mali MDA/PC coverage (Therapeutic coverage) 2016 Download map png Download map
Western Africa Guinea MDA/PC coverage (Therapeutic coverage) 2014 Download map png Download map
Western Africa Burkina Faso MDA/PC rounds (Geographic coverage) 2013 - 2016 Download map png Download map
Western Africa Liberia MDA/PC coverage (Geographic coverage) 2016 Download map png Download map
Western Africa Cape Verde MDA/PC coverage (Therapeutic coverage) 2016 Download map png Download map
Western Africa Benin Endemicity 2017 Download map png Download map
Western Africa Sierra Leone MDA/PC coverage (Therapeutic coverage) 2016 Download map png Download map
Western Africa Algeria MDA/PC coverage (Therapeutic coverage) 2013 Download map png Download map
Western Africa Algeria MDA/PC coverage (Therapeutic coverage) 2015 Download map png Download map
Western Africa Guinea Endemicity 2017 Download map png Download map
Western Africa Nigeria Mapping Surveys (Skin Biopsy) 2015 Download map png Download map
Western Africa Guinea-Bissau MDA/PC coverage (Geographic coverage) 2016 Download map png Download map
Western Africa Sierra Leone MDA/PC coverage (Geographic coverage) 2014 Download map png Download map
Western Africa Burkina Faso MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Western Africa Benin MDA/PC coverage (Geographic coverage) 2014 Download map png Download map
Western Africa Algeria MDA/PC coverage (Therapeutic coverage) 2016 Download map png Download map
Western Africa Guinea-Bissau MDA/PC coverage (Therapeutic coverage) 2016 Download map png Download map
Western Africa Guinea-Bissau MDA/PC rounds (Geographic coverage) 2013 - 2016 Download map png Download map
Western Africa The Gambia MDA/PC coverage (Geographic coverage) 2016 Download map png Download map
Western Africa Cote d’Ivoire Mapping Surveys (Skin Biopsy) 2014 Download map png Download map
Western Africa Mali MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Western Africa Cape Verde MDA/PC rounds (Therapeutic coverage) 2013 - 2016 Download map png Download map
Western Africa Senegal MDA/PC coverage (Geographic coverage) 2014 Download map png Download map
Western Africa Togo Endemicity 2017 Download map png Download map
Western Africa Nigeria Mapping Surveys (Nodule Palpation) 1989 - 2011 Download map png Download map
Western Africa Nigeria MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Western Africa Senegal MDA/PC coverage (Therapeutic coverage) 2015 Download map png Download map
Western Africa Cote d’Ivoire MDA/PC rounds (Therapeutic coverage) 2013 - 2016 Download map png Download map
Western Africa Guinea-Bissau MDA/PC coverage (Geographic coverage) 2014 Download map png Download map
Western Africa Mauritania MDA/PC coverage (Geographic coverage) 2013 Download map png Download map
Western Africa Togo MDA/PC coverage (Therapeutic coverage) 2016 Download map png Download map
Western Africa Mali MDA/PC coverage (Therapeutic coverage) 2015 Download map png Download map
Western Africa Guinea MDA/PC rounds (Geographic coverage) 2013 - 2016 Download map png Download map
Western Africa Senegal MDA/PC coverage (Geographic coverage) 2013 Download map png Download map
Western Africa Togo MDA/PC rounds (Therapeutic coverage) 2013 - 2016 Download map png Download map
Western Africa Liberia MDA/PC coverage (Geographic coverage) 2013 Download map png Download map
Western Africa Nigeria MDA/PC coverage (Therapeutic coverage) 2014 Download map png Download map
Western Africa Burkina Faso MDA/PC coverage (Therapeutic coverage) 2016 Download map png Download map
Western Africa Senegal Endemicity 2017 Download map png Download map
Western Africa Guinea-Bissau MDA/PC coverage (Geographic coverage) 2013 Download map png Download map
Western Africa Nigeria MDA/PC coverage (Geographic coverage) 2013 Download map png Download map
Western Africa Benin MDA/PC rounds (Therapeutic coverage) 2013 - 2016 Download map png Download map
Western Africa Cote d’Ivoire MDA/PC coverage (Therapeutic coverage) 2015 Download map png Download map
Western Africa Nigeria MDA/PC coverage (Therapeutic coverage) 2016 Download map png Download map
Western Africa Guinea-Bissau MDA/PC coverage (Therapeutic coverage) 2014 Download map png Download map
Western Africa The Gambia MDA/PC coverage (Geographic coverage) 2013 Download map png Download map
Western Africa Niger Endemicity 2017 Download map png Download map
Western Africa Guinea-Bissau MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Western Africa Mali MDA/PC coverage (Geographic coverage) 2016 Download map png Download map
Western Africa Liberia MDA/PC rounds (Therapeutic coverage) 2013 - 2016 Download map png Download map
Western Africa Sierra Leone MDA/PC coverage (Geographic coverage) 2013 Download map png Download map
Western Africa Ghana MDA/PC coverage (Therapeutic coverage) 2014 Download map png Download map
Western Africa Mali MDA/PC rounds (Geographic coverage) 2013 - 2016 Download map png Download map
Western Africa Cape Verde Endemicity 2017 Download map png Download map
Western Africa Liberia Endemicity 2017 Download map png Download map
Western Africa Guinea MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Western Africa Ghana 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 Togo MDA/PC coverage (Geographic coverage) 2016 Download map png Download map
Western Africa Cote d’Ivoire MDA/PC coverage (Geographic coverage) 2016 Download map png Download map
Western Africa Liberia MDA/PC coverage (Geographic coverage) 2014 Download map png Download map
Western Africa Cote d’Ivoire MDA/PC coverage (Therapeutic coverage) 2013 Download map png Download map
Western Africa Sierra Leone MDA/PC coverage (Therapeutic coverage) 2015 Download map png Download map
Western Africa Togo MDA/PC coverage (Therapeutic coverage) 2015 Download map png Download map
Western Africa Guinea MDA/PC coverage (Therapeutic coverage) 2016 Download map png Download map
Western Africa Niger MDA/PC coverage (Therapeutic coverage) 2016 Download map png Download map
Western Africa Burkina Faso MDA/PC coverage (Therapeutic coverage) 2014 Download map png Download map
Western Africa Guinea MDA/PC coverage (Geographic coverage) 2014 Download map png Download map
Western Africa Mauritania MDA/PC coverage (Geographic coverage) 2014 Download map png Download map
Western Africa Mauritania MDA/PC coverage (Therapeutic coverage) 2015 Download map png Download map
Western Africa Niger MDA/PC coverage (Geographic coverage) 2016 Download map png Download map
Western Africa Ghana MDA/PC rounds (Therapeutic coverage) 2013 - 2016 Download map png Download map
Western Africa Cote d’Ivoire MDA/PC coverage (Geographic coverage) 2013 Download map png Download map
Western Africa Cote d’Ivoire Mapping Surveys (Nodule Palpation) 2014 Download map png Download map
Western Africa Mali MDA/PC coverage (Geographic coverage) 2013 Download map png Download map
Southern Africa Mozambique MDA/PC coverage (Geographic coverage) 2014 Download map png Download map
Southern Africa Zambia MDA/PC coverage (Geographic coverage) 2014 Download map png Download map
Southern Africa Zimbabwe MDA/PC coverage (Therapeutic coverage) 2015 Download map png Download map
Southern Africa Malawi MDA/PC coverage (Therapeutic coverage) 2015 Download map png Download map
Southern Africa Namibia MDA/PC coverage (Therapeutic coverage) 2014 Download map png Download map
Southern Africa Namibia MDA/PC coverage (Therapeutic coverage) 2013 Download map png Download map
Southern Africa South Africa MDA/PC rounds (Geographic coverage) 2013 - 2016 Download map png Download map
Southern Africa Lesotho MDA/PC coverage (Therapeutic coverage) 2014 Download map png Download map
Southern Africa Zimbabwe MDA/PC coverage (Geographic coverage) 2016 Download map png Download map

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