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 Countrysort descending Program stage Years Maps Data
Southern Africa Malawi MDA/PC coverage (Therapeutic coverage) 2014 Download map png Download map
Southern Africa Malawi Mapping Surveys (Nodule Palpation) 1998 Download map png Download map
Southern Africa Malawi Endemicity 2017 Download map png Download map
Southern Africa Malawi Impact Assessment (Skin Biopsy) Download map png Download map
Southern Africa Malawi MDA/PC coverage (Therapeutic coverage) 2013 Download map png Download map
Southern Africa Malawi MDA/PC coverage (Geographic coverage) 2013 Download map png Download map
Southern Africa Malawi MDA/PC rounds (Geographic coverage) 2013 - 2016 Download map png Download map
Western Africa Mali MDA/PC rounds (Therapeutic coverage) 2013 - 2016 Download map png Download map
Western Africa Mali MDA/PC coverage (Therapeutic coverage) 2013 Download map png Download map
Western Africa Mali MDA/PC coverage (Geographic coverage) 2014 Download map png Download map
Western Africa Mali Endemicity 2017 Download map png Download map
Western Africa Mali 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 Mali MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Western Africa Mali MDA/PC coverage (Therapeutic coverage) 2015 Download map png Download map
Western Africa Mali MDA/PC coverage (Geographic coverage) 2016 Download map png Download map
Western Africa Mali MDA/PC rounds (Geographic coverage) 2013 - 2016 Download map png Download map
Western Africa Mali 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 Mauritania Endemicity 2017 Download map png Download map
Western Africa Mauritania 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 Mauritania MDA/PC coverage (Therapeutic coverage) 2014 Download map png Download map
Western Africa Mauritania MDA/PC rounds (Geographic coverage) 2013 - 2016 Download map png Download map
Western Africa Mauritania MDA/PC rounds (Therapeutic coverage) 2013 - 2016 Download map png Download map
Western Africa Mauritania MDA/PC coverage (Therapeutic coverage) 2016 Download map png Download map
Western Africa Mauritania MDA/PC coverage (Geographic coverage) 2013 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
Mauritius Endemicity 2017 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
Eastern Africa Mauritius MDA/PC rounds (Therapeutic coverage) 2013 - 2016 Download map png Download map
Southern Africa Mozambique MDA/PC coverage (Geographic coverage) 2014 Download map png Download map
Southern Africa Mozambique Endemicity 2017 Download map png Download map
Southern Africa Mozambique MDA/PC coverage (Geographic coverage) 2016 Download map png Download map
Southern Africa Mozambique MDA/PC rounds (Geographic coverage) 2013 - 2016 Download map png Download map
Southern Africa Mozambique MDA/PC coverage (Therapeutic coverage) 2013 Download map png Download map
Southern Africa Mozambique MDA/PC coverage (Therapeutic coverage) 2015 Download map png Download map
Southern Africa Mozambique MDA/PC rounds (Therapeutic coverage) 2013 - 2016 Download map png Download map
Southern Africa Mozambique Mapping Surveys (Nodule Palpation) 2001 - 2007 Download map png Download map
Southern Africa Mozambique MDA/PC coverage (Therapeutic coverage) 2014 Download map png Download map
Southern Africa Mozambique MDA/PC coverage (Therapeutic coverage) 2016 Download map png Download map
Southern Africa Mozambique 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 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 Namibia MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Southern Africa Namibia MDA/PC coverage (Geographic coverage) 2016 Download map png Download map
Southern Africa Namibia MDA/PC coverage (Therapeutic coverage) 2016 Download map png Download map
Southern Africa Namibia Endemicity 2017 Download map png Download map
Southern Africa Namibia MDA/PC rounds (Geographic coverage) 2013 - 2016 Download map png Download map
Southern Africa Namibia MDA/PC coverage (Geographic coverage) 2013 Download map png Download map
Southern Africa Namibia MDA/PC coverage (Geographic coverage) 2014 Download map png Download map
Southern Africa Namibia MDA/PC coverage (Therapeutic coverage) 2015 Download map png Download map
Southern Africa Namibia MDA/PC rounds (Therapeutic coverage) 2013 - 2016 Download map png Download map
Western Africa Niger MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Western Africa Niger MDA/PC rounds (Geographic coverage) 2013 - 2016 Download map png Download map
Western Africa Niger MDA/PC coverage (Therapeutic coverage) 2015 Download map png Download map
Western Africa Niger MDA/PC rounds (Therapeutic coverage) 2013 - 2016 Download map png Download map
Western Africa Niger MDA/PC coverage (Therapeutic coverage) 2013 Download map png Download map
Western Africa Niger MDA/PC coverage (Geographic coverage) 2013 Download map png Download map
Western Africa Niger MDA/PC coverage (Geographic coverage) 2014 Download map png Download map
Western Africa Niger MDA/PC coverage (Therapeutic coverage) 2014 Download map png Download map
Western Africa Niger Endemicity 2017 Download map png Download map
Western Africa Niger MDA/PC coverage (Therapeutic coverage) 2016 Download map png Download map
Western Africa Niger MDA/PC coverage (Geographic coverage) 2016 Download map png Download map
Western Africa Nigeria Endemicity 2017 Download map png Download map
Western Africa Nigeria MDA/PC rounds (Therapeutic coverage) 2013 - 2016 Download map png Download map
Western Africa Nigeria 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 Nigeria MDA/PC coverage (Therapeutic coverage) 2013 Download map png Download map
Western Africa Nigeria Impact Assessment (Skin Biopsy) 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 Nigeria Mapping Surveys (Skin Biopsy) 2015 Download map png Download map
Western Africa Nigeria MDA/PC coverage (Geographic coverage) 2015 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 (Therapeutic coverage) 2014 Download map png Download map
Western Africa Nigeria MDA/PC coverage (Geographic coverage) 2013 Download map png Download map
Western Africa Nigeria MDA/PC coverage (Therapeutic coverage) 2016 Download map png Download map
Eastern Africa Rwanda MDA/PC coverage (Geographic coverage) 2014 Download map png Download map
Eastern Africa Rwanda MDA/PC coverage (Therapeutic coverage) 2015 Download map png Download map
Eastern Africa Rwanda MDA/PC coverage (Geographic coverage) 2013 Download map png Download map
Eastern Africa Rwanda Mapping Surveys (Nodule Palpation) Download map png Download map
Eastern Africa Rwanda MDA/PC coverage (Geographic coverage) 2016 Download map png Download map
Eastern Africa Rwanda MDA/PC rounds (Geographic coverage) 2013 - 2016 Download map png Download map
Eastern Africa Rwanda MDA/PC rounds (Therapeutic coverage) 2013 - 2016 Download map png Download map
Eastern Africa Rwanda Endemicity 2017 Download map png Download map
Eastern Africa Rwanda MDA/PC coverage (Therapeutic coverage) 2016 Download map png Download map
Eastern Africa Rwanda MDA/PC coverage (Therapeutic coverage) 2013 Download map png Download map
Eastern Africa Rwanda MDA/PC coverage (Therapeutic coverage) 2014 Download map png Download map
Eastern Africa Rwanda MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Central Africa Sao Tome & Principe MDA/PC rounds (Therapeutic coverage) 2013 - 2016 Download map png Download map
Central Africa Sao Tome & Principe MDA/PC coverage (Therapeutic coverage) 2013 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 Endemicity 2017 Download map png Download map
Central Africa Sao Tome & Principe MDA/PC coverage (Geographic coverage) 2013 Download map png Download map

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