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 Location Program stage Years Maps Data
Central Africa Republic of Congo MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Western Africa Nigeria 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 Nigeria MDA/PC coverage (Geographic coverage) 2013 Download map png Download map
Eastern Africa Rwanda MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Eastern Africa South Sudan MDA/PC coverage (Geographic coverage) 2016 Download map png Download map
Western Africa Senegal MDA/PC coverage (Geographic coverage) 2016 Download map png Download map
Central Africa Republic of Congo MDA/PC coverage (Geographic coverage) 2016 Download map png Download map
Eastern Africa South Sudan MDA/PC coverage (Geographic coverage) 2013 Download map png Download map
Western Africa Senegal MDA/PC coverage (Geographic coverage) 2013 Download map png Download map
Central Africa Republic of Congo MDA/PC coverage (Geographic coverage) 2013 Download map png Download map
Western Africa Sierra Leone 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
Eastern Africa Rwanda MDA/PC coverage (Geographic coverage) 2013 Download map png Download map
Eastern Africa South Sudan MDA/PC coverage (Geographic coverage) 2014 Download map png Download map
Western Africa Senegal MDA/PC coverage (Geographic coverage) 2014 Download map png Download map
Central Africa Republic of Congo MDA/PC coverage (Geographic coverage) 2014 Download map png Download map
Southern Africa Mozambique MDA/PC coverage (Geographic coverage) 2014 Download map png Download map
Central Africa Sao Tome & Principe MDA/PC coverage (Geographic coverage) 2014 Download map png Download map
Central Africa Sao Tome & Principe MDA/PC coverage (Geographic coverage) 2013 Download map png Download map
Central Africa Sao Tome & Principe MDA/PC coverage (Geographic coverage) 2016 Download map png Download map
Southern Africa South Africa MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Southern Africa Namibia MDA/PC coverage (Geographic coverage) 2013 Download map png Download map
Southern Africa Mozambique MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Southern Africa South Africa MDA/PC coverage (Geographic coverage) 2014 Download map png Download map
Southern Africa Mozambique MDA/PC coverage (Geographic coverage) 2016 Download map png Download map
Southern Africa Namibia MDA/PC coverage (Geographic coverage) 2016 Download map png Download map
Western Africa Niger MDA/PC coverage (Geographic coverage) 2014 Download map png Download map
Eastern Africa Seychelles MDA/PC coverage (Geographic coverage) 2016 Download map png Download map
Southern Africa Mozambique MDA/PC coverage (Geographic coverage) 2013 Download map png Download map
Eastern Africa Tanzania (Mainland) MDA/PC coverage (Geographic coverage) 2013 Download map png Download map
Western Africa Niger 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 Seychelles MDA/PC coverage (Geographic coverage) 2013 Download map png Download map
Southern Africa South Africa MDA/PC coverage (Geographic coverage) 2016 Download map png Download map
Eastern Africa Tanzania (Mainland) MDA/PC coverage (Geographic coverage) 2014 Download map png Download map
Southern Africa Namibia MDA/PC coverage (Geographic coverage) 2014 Download map png Download map
Western Africa Niger MDA/PC coverage (Geographic coverage) 2016 Download map png Download map
Southern Africa Namibia MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Eastern Africa Seychelles MDA/PC coverage (Geographic coverage) 2014 Download map png Download map
Western Africa Niger MDA/PC coverage (Geographic coverage) 2013 Download map png Download map
Southern Africa South Africa MDA/PC coverage (Geographic coverage) 2013 Download map png Download map
Central Africa Sao Tome & Principe MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Western Africa Togo MDA/PC coverage (Geographic coverage) 2016 Download map png Download map
Western Africa Togo MDA/PC coverage (Geographic coverage) 2013 Download map png Download map
Western Africa Togo MDA/PC coverage (Geographic coverage) 2014 Download map png Download map
Western Africa Togo MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Eastern Africa Tanzania (Mainland) MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Eastern Africa Uganda MDA/PC coverage (Geographic coverage) 2013 Download map png Download map
Eastern Africa Tanzania (Zanzibar) MDA/PC coverage (Geographic coverage) 2016 Download map png Download map
Southern Africa Zambia MDA/PC coverage (Geographic coverage) 2014 Download map png Download map
Southern Africa Zambia MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Southern Africa Zambia MDA/PC coverage (Geographic coverage) 2013 Download map png Download map
Southern Africa Zimbabwe MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Southern Africa Zambia MDA/PC coverage (Geographic coverage) 2016 Download map png Download map
Southern Africa Zimbabwe MDA/PC coverage (Geographic coverage) 2014 Download map png Download map
Southern Africa Zimbabwe MDA/PC coverage (Geographic coverage) 2013 Download map png Download map
Eastern Africa Uganda MDA/PC coverage (Geographic coverage) 2016 Download map png Download map
Eastern Africa Uganda MDA/PC coverage (Geographic coverage) 2014 Download map png Download map
Eastern Africa Tanzania (Zanzibar) MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Eastern Africa Tanzania (Zanzibar) MDA/PC coverage (Geographic coverage) 2013 Download map png Download map
Eastern Africa Uganda MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Eastern Africa Tanzania (Mainland) MDA/PC coverage (Geographic coverage) 2016 Download map png Download map
Southern Africa Zimbabwe MDA/PC coverage (Geographic coverage) 2016 Download map png Download map
Eastern Africa Tanzania (Zanzibar) MDA/PC coverage (Geographic coverage) 2014 Download map png Download map
Western Africa Benin MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Western Africa Benin MDA/PC coverage (Geographic coverage) 2016 Download map png Download map
Western Africa Benin MDA/PC coverage (Geographic coverage) 2013 Download map png Download map
Western Africa Benin MDA/PC coverage (Geographic coverage) 2014 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
Eritrea MDA/PC coverage (Geographic coverage) 2014 Download map png Download map
Eritrea MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Western Africa Liberia MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Western Africa Liberia MDA/PC coverage (Geographic coverage) 2016 Download map png Download map
Western Africa Liberia MDA/PC coverage (Geographic coverage) 2013 Download map png Download map
Western Africa Liberia MDA/PC coverage (Geographic coverage) 2014 Download map png Download map
Mauritius MDA/PC coverage (Geographic coverage) 2013 Download map png Download map
Mauritius MDA/PC coverage (Geographic coverage) 2014 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
Western Africa The Gambia MDA/PC coverage (Geographic coverage) 2016 Download map png Download map
Western Africa The Gambia MDA/PC coverage (Geographic coverage) 2013 Download map png Download map
Western Africa The Gambia MDA/PC coverage (Geographic coverage) 2014 Download map png Download map
Western Africa The Gambia MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Western Africa Cote d’Ivoire MDA/PC coverage (Therapeutic coverage) 2014 Download map png Download map
Central Africa Burundi MDA/PC coverage (Therapeutic coverage) 2013 Download map png Download map
Western Africa Algeria MDA/PC coverage (Therapeutic coverage) 2013 Download map png Download map
Central Africa Chad MDA/PC coverage (Therapeutic coverage) 2013 Download map png Download map
Western Africa Burkina Faso MDA/PC coverage (Therapeutic coverage) 2014 Download map png Download map
Central Africa Central African Republic MDA/PC coverage (Therapeutic coverage) 2014 Download map png Download map
Western Africa Cape Verde MDA/PC coverage (Therapeutic coverage) 2015 Download map png Download map
Southern Africa Botswana MDA/PC coverage (Therapeutic coverage) 2015 Download map png Download map
Eastern Africa Comoros MDA/PC coverage (Therapeutic coverage) 2016 Download map png Download map
Central Africa Equatorial Guinea MDA/PC coverage (Therapeutic coverage) 2013 Download map png Download map
Central Africa Cameroon MDA/PC coverage (Therapeutic coverage) 2016 Download map png Download map
Central Africa Angola MDA/PC coverage (Therapeutic coverage) 2016 Download map png Download map
Eastern Africa Comoros MDA/PC coverage (Therapeutic coverage) 2013 Download map png Download map
Central Africa Democratic Republic of the Congo MDA/PC coverage (Therapeutic coverage) 2014 Download map png Download map
Central Africa Cameroon MDA/PC coverage (Therapeutic coverage) 2013 Download map png Download map

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