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
Region Country Program stage Yearssort ascending Maps Data
Eastern Africa Uganda MDA/PC rounds (Geographic coverage) 2013 - 2016 Download map png Download map
Western Africa Benin MDA/PC rounds (Therapeutic coverage) 2013 - 2016 Download map png Download map
Western Africa Mali MDA/PC coverage (Geographic coverage) 2016 Download map png Download map
Eastern Africa Ethiopia MDA/PC rounds (Geographic coverage) 2013 - 2016 Download map png Download map
Eastern Africa Tanzania (Zanzibar) 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
Southern Africa Lesotho MDA/PC rounds (Therapeutic coverage) 2013 - 2016 Download map png Download map
Eastern Africa Kenya MDA/PC coverage (Therapeutic coverage) 2016 Download map png Download map
Southern Africa Mozambique MDA/PC coverage (Therapeutic coverage) 2016 Download map png Download map
Central Africa Cameroon MDA/PC coverage (Therapeutic coverage) 2016 Download map png Download map
Southern Africa Botswana MDA/PC rounds (Geographic coverage) 2013 - 2016 Download map png Download map
Western Africa Mali MDA/PC rounds (Geographic coverage) 2013 - 2016 Download map png Download map
Eastern Africa Tanzania (Mainland) MDA/PC coverage (Geographic coverage) 2016 Download map png Download map
Central Africa Angola MDA/PC coverage (Geographic coverage) 2016 Download map png Download map
Eastern Africa South Sudan MDA/PC rounds (Therapeutic coverage) 2013 - 2016 Download map png Download map
Central Africa Democratic Republic of the Congo 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) 2016 Download map png Download map
Western Africa Togo MDA/PC coverage (Geographic coverage) 2016 Download map png Download map
Central Africa Equatorial Guinea MDA/PC rounds (Therapeutic coverage) 2013 - 2016 Download map png Download map
Central Africa Democratic Republic of the Congo MDA/PC rounds (Therapeutic coverage) 2013 - 2016 Download map png Download map
Western Africa Cote d’Ivoire MDA/PC coverage (Geographic coverage) 2016 Download map png Download map
Southern Africa eSwatini MDA/PC coverage (Geographic coverage) 2016 Download map png Download map
Southern Africa Namibia MDA/PC rounds (Therapeutic coverage) 2013 - 2016 Download map png Download map
Central Africa Central African Republic 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
Eastern Africa South Sudan MDA/PC rounds (Geographic coverage) 2013 - 2016 Download map png Download map
Western Africa Guinea MDA/PC coverage (Therapeutic coverage) 2016 Download map png Download map
Eastern Africa Comoros MDA/PC rounds (Geographic coverage) 2013 - 2016 Download map png Download map
Western Africa Niger MDA/PC coverage (Geographic coverage) 2016 Download map png Download map
Eastern Africa Tanzania (Zanzibar) MDA/PC rounds (Geographic coverage) 2013 - 2016 Download map png Download map
Western Africa Ghana MDA/PC rounds (Therapeutic coverage) 2013 - 2016 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
Central Africa Angola MDA/PC coverage (Therapeutic coverage) 2015 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
Central Africa Cameroon MDA/PC coverage (Therapeutic coverage) 2015 Download map png Download map
Eastern Africa South Sudan MDA/PC coverage (Therapeutic coverage) 2015 Download map png Download map
Eastern Africa South Sudan MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Western Africa Sierra Leone MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Western Africa Ghana MDA/PC coverage (Therapeutic coverage) 2015 Download map png Download map
Western Africa Ghana MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Western Africa Niger MDA/PC coverage (Therapeutic coverage) 2015 Download map png Download map
Eastern Africa Madagascar MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Southern Africa Namibia MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Eastern Africa Kenya MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Western Africa The Gambia MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Southern Africa Zambia MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Central Africa Gabon Mapping Surveys (Skin Biopsy) 2014 - 2015 Download map png Download map
Central Africa Chad MDA/PC coverage (Therapeutic coverage) 2015 Download map png Download map
Eastern Africa Ethiopia MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Western Africa Benin MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Eastern Africa Seychelles MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Eastern Africa Comoros MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Western Africa Senegal MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Central Africa Gabon MDA/PC coverage (Therapeutic coverage) 2015 Download map png Download map
Central Africa Republic of Congo MDA/PC coverage (Therapeutic coverage) 2015 Download map png Download map
Southern Africa Zambia MDA/PC coverage (Therapeutic coverage) 2015 Download map png Download map
Central Africa Angola Mapping Surveys (Skin Biopsy) 2015 Download map png Download map
Eastern Africa Rwanda MDA/PC coverage (Therapeutic coverage) 2015 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
Eastern Africa Tanzania (Zanzibar) MDA/PC coverage (Therapeutic coverage) 2015 Download map png Download map
Western Africa Burkina Faso MDA/PC coverage (Therapeutic coverage) 2015 Download map png Download map
Eritrea MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Southern Africa Lesotho MDA/PC coverage (Therapeutic coverage) 2015 Download map png Download map
Southern Africa eSwatini MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Western Africa Guinea-Bissau MDA/PC coverage (Therapeutic coverage) 2015 Download map png Download map
Central Africa Democratic Republic of the Congo Mapping Surveys (Skin Biopsy) 2014 - 2015 Download map png Download map
Southern Africa Malawi MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Western Africa Cape Verde MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Central Africa Republic of Congo MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Mauritius MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Western Africa Togo MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Central Africa Republic of Congo Mapping Surveys (Skin Biopsy) 2014 - 2015 Download map png Download map
Central Africa Cameroon MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Central Africa Equatorial Guinea MDA/PC coverage (Therapeutic coverage) 2015 Download map png Download map
Eastern Africa Tanzania (Zanzibar) MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Central Africa Equatorial Guinea MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Southern Africa Botswana MDA/PC coverage (Therapeutic coverage) 2015 Download map png Download map
Central Africa Central African Republic MDA/PC coverage (Therapeutic coverage) 2015 Download map png Download map
Western Africa Liberia MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Western Africa Guinea MDA/PC coverage (Therapeutic coverage) 2015 Download map png Download map
Central Africa Burundi MDA/PC coverage (Therapeutic coverage) 2015 Download map png Download map
Western Africa Nigeria MDA/PC coverage (Therapeutic coverage) 2015 Download map png Download map
Southern Africa Lesotho MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Southern Africa Zimbabwe MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Central Africa Gabon MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Southern Africa South Africa MDA/PC coverage (Therapeutic coverage) 2015 Download map png Download map
Western Africa Cote d’Ivoire MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Eastern Africa Kenya MDA/PC coverage (Therapeutic coverage) 2015 Download map png Download map
Southern Africa Mozambique MDA/PC coverage (Therapeutic coverage) 2015 Download map png Download map
Eastern Africa Tanzania (Mainland) MDA/PC coverage (Therapeutic coverage) 2015 Download map png Download map
Eastern Africa Tanzania (Mainland) MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Central Africa Angola MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Central Africa Democratic Republic of the Congo MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Eastern Africa Uganda MDA/PC coverage (Therapeutic coverage) 2015 Download map png Download map
Southern Africa South Africa MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Western Africa Algeria MDA/PC coverage (Therapeutic coverage) 2015 Download map png Download map

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