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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600 maps found
Region Location Program stage Years Maps Data
Central Africa Angola MDA/PC coverage (Therapeutic) 2014 Download map
Southern Africa Zimbabwe MDA/PC coverage (Geographic) 2013 Download map
Southern Africa Mozambique MDA/PC coverage (Therapeutic) 2013 Download map
Western Africa Nigeria MDA/PC coverage (Geographic) 2014 Download map
Central Africa Burundi MDA/PC coverage (Geographic) 2016 Download map
Central Africa Chad MDA/PC coverage (Therapeutic) 2016 Download map
Western Africa Cote d’Ivoire MDA/PC rounds (Geographic) 1990 - 2016 Download map
Western Africa Algeria MDA/PC rounds (Geographic) 2013 - 2016 Download map
Eastern Africa Uganda MDA/PC rounds (Geographic) 2013 - 2016 Download map
Western Africa Algeria MDA/PC rounds (Therapeutic) 2013 - 2016 Download map
Eastern Africa Uganda 2017 Download map
Eastern Africa Uganda MDA/PC coverage (Therapeutic) 2013 Download map
Central Africa Burundi MDA/PC coverage (Geographic) 2013 Download map
Central Africa Gabon MDA/PC coverage (Geographic) 2016 Download map
Central Africa Republic of Congo MDA/PC coverage (Therapeutic) 2015 Download map
Eastern Africa Rwanda MDA/PC coverage (Therapeutic) 2016 Download map
Eastern Africa Ethiopia MDA/PC coverage (Therapeutic) 2013 Download map
Central Africa Chad MDA/PC coverage (Therapeutic) 2013 Download map
Southern Africa Zimbabwe MDA/PC coverage (Geographic) 2014 Download map
Eastern Africa Seychelles MDA/PC coverage (Geographic) 2016 Download map
Western Africa Guinea-Bissau MDA/PC coverage (Geographic) 2013 Download map
Mali MDA/PC coverage (Therapeutic) 2016 Download map
Eastern Africa Ethiopia MDA/PC rounds (Geographic) 2013 - 2016 Download map
Western Africa Nigeria MDA/PC rounds (Geographic) 1990 - 2016 Download map
Western Africa Guinea MDA/PC rounds (Therapeutic) 2013 - 2016 Download map
Central Africa Chad MDA/PC rounds (Therapeutic) 2013 - 2016 Download map
Western Africa Niger 2017 Download map
Western Africa Mauritania MDA/PC coverage (Therapeutic) 2015 Download map
Eastern Africa Madagascar MDA/PC coverage (Geographic) 2013 Download map
Eastern Africa Seychelles MDA/PC coverage (Geographic) 2015 Download map
Southern Africa eSwatini MDA/PC coverage (Therapeutic) 2014 Download map
Southern Africa Zimbabwe MDA/PC coverage (Therapeutic) 2015 Download map
Central Africa Republic of Congo MDA/PC coverage (Therapeutic) 2013 Download map
Central Africa Democratic Republic of the Congo MDA/PC coverage (Geographic) 2014 Download map
Southern Africa eSwatini MDA/PC coverage (Therapeutic) 2015 Download map
Central Africa Burundi MDA/PC rounds (Geographic) 1990 - 2016 Download map
Western Africa Mauritania MDA/PC rounds (Geographic) 2013 - 2016 Download map
Eastern Africa Seychelles MDA/PC rounds (Geographic) 2013 - 2016 Download map
Eastern Africa Seychelles MDA/PC rounds (Therapeutic) 2013 - 2016 Download map
Western Africa Benin 2017 Download map
Western Africa Benin MDA/PC coverage (Therapeutic) 2014 Download map
Western Africa Cote d’Ivoire MDA/PC coverage (Geographic) 2013 Download map
Southern Africa eSwatini MDA/PC coverage (Geographic) 2014 Download map
Central Africa Chad MDA/PC coverage (Therapeutic) 2014 Download map
Western Africa Mauritania MDA/PC coverage (Therapeutic) 2016 Download map
Eastern Africa Kenya MDA/PC coverage (Therapeutic) 2013 Download map
Central Africa Gabon 2017 Download map
Central Africa Chad MDA/PC coverage (Geographic) 2013 Download map
Western Africa Ghana MDA/PC coverage (Therapeutic) 2014 Download map
Western Africa Mauritania MDA/PC coverage (Geographic) 2014 Download map
Western Africa Cape Verde MDA/PC coverage (Geographic) 2016 Download map
Central Africa Chad MDA/PC rounds (Geographic) 1990 - 2016 Download map
Southern Africa eSwatini MDA/PC rounds (Geographic) 2013 - 2016 Download map
Central Africa Angola MDA/PC rounds (Therapeutic) 2013 - 2016 Download map
Eastern Africa South Sudan 2017 Download map
Eastern Africa Ethiopia MDA/PC coverage (Therapeutic) 2015 Download map
Central Africa Gabon MDA/PC coverage (Geographic) 2014 Download map
Southern Africa Malawi MDA/PC coverage (Geographic) 2015 Download map
Western Africa Burkina Faso MDA/PC coverage (Therapeutic) 2015 Download map
Central Africa Sao Tome & Principe MDA/PC coverage (Therapeutic) 2015 Download map
Southern Africa Malawi MDA/PC coverage (Therapeutic) 2013 Download map
Central Africa Burundi MDA/PC coverage (Geographic) 2014 Download map
Eastern Africa Rwanda MDA/PC coverage (Therapeutic) 2013 Download map
Central Africa Chad MDA/PC coverage (Geographic) 2014 Download map
Southern Africa Malawi MDA/PC coverage (Geographic) 2016 Download map
Southern Africa eSwatini MDA/PC coverage (Therapeutic) 2016 Download map
Central Africa Cameroon MDA/PC rounds (Geographic) 1990 - 2016 Download map
Central Africa Central African Republic 2017 Download map
Eastern Africa Tanzania (Zanzibar) MDA/PC coverage (Therapeutic) 2013 Download map
Western Africa Liberia MDA/PC coverage (Geographic) 2013 Download map
Western Africa Algeria MDA/PC coverage (Geographic) 2015 Download map
Eastern Africa Rwanda MDA/PC coverage (Therapeutic) 2014 Download map
Eastern Africa Kenya MDA/PC coverage (Therapeutic) 2016 Download map
Eastern Africa Uganda MDA/PC coverage (Geographic) 2016 Download map
Eastern Africa Kenya 2017 Download map
Eastern Africa Rwanda MDA/PC coverage (Geographic) 2013 Download map
Western Africa Guinea-Bissau MDA/PC coverage (Therapeutic) 2014 Download map
Eastern Africa Ethiopia MDA/PC coverage (Geographic) 2015 Download map
Eastern Africa Uganda MDA/PC coverage (Geographic) 2015 Download map
Central Africa Democratic Republic of the Congo MDA/PC coverage (Therapeutic) 2016 Download map
Southern Africa Lesotho MDA/PC rounds (Geographic) 1990 - 2016 Download map
Eastern Africa Madagascar MDA/PC rounds (Geographic) 2013 - 2016 Download map
Eastern Africa South Sudan MDA/PC rounds (Geographic) 1990 - 2016 Download map
Southern Africa Malawi MDA/PC rounds (Therapeutic) 2013 - 2016 Download map
Mali MDA/PC rounds (Geographic) 2013 - 2016 Download map
Western Africa Cape Verde MDA/PC coverage (Geographic) 2014 Download map
Southern Africa Malawi MDA/PC coverage (Therapeutic) 2014 Download map
Eastern Africa Rwanda MDA/PC coverage (Geographic) 2014 Download map
Western Africa Burkina Faso MDA/PC coverage (Geographic) 2016 Download map
Western Africa Togo MDA/PC coverage (Therapeutic) 2016 Download map
Central Africa Equatorial Guinea MDA/PC rounds (Geographic) 1990 - 2016 Download map
Central Africa Cameroon MDA/PC rounds (Geographic) 2013 - 2016 Download map
Central Africa Chad MDA/PC rounds (Geographic) 2013 - 2016 Download map
Central Africa Cameroon MDA/PC rounds (Therapeutic) 2013 - 2016 Download map
Southern Africa Zambia 2017 Download map
Eastern Africa Kenya MDA/PC coverage (Therapeutic) 2015 Download map
Western Africa Benin MDA/PC coverage (Geographic) 2013 Download map
Eastern Africa Ethiopia MDA/PC coverage (Geographic) 2016 Download map
Central Africa Cameroon MDA/PC coverage (Therapeutic) 2015 Download map
Eastern Africa Rwanda MDA/PC coverage (Therapeutic) 2015 Download map

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