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.

90 maps found
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600 maps found
Region Locationsort descending Program stage Years Maps Data
Western Africa Liberia MDA/PC rounds (Geographic) 2013 - 2016 Download map
Western Africa Liberia MDA/PC coverage (Geographic) 2016 Download map
Western Africa Liberia Mapping Surveys (Nodule Palpation) 1998 Download map
Western Africa Liberia MDA/PC coverage (Geographic) 2014 Download map
Western Africa Liberia 2017 Download map
Western Africa Liberia MDA/PC coverage (Geographic) 2013 Download map
Western Africa Liberia Impact Assessment (Skin Biopsy) Download map
Western Africa Liberia MDA/PC rounds (Therapeutic) 2013 - 2016 Download map
Western Africa Liberia MDA/PC coverage (Therapeutic) 2014 Download map
Western Africa Liberia MDA/PC rounds (Geographic) 1990 - 2016 Download map
Eastern Africa Madagascar 2017 Download map
Eastern Africa Madagascar MDA/PC coverage (Therapeutic) 2014 Download map
Eastern Africa Madagascar MDA/PC coverage (Therapeutic) 2013 Download map
Eastern Africa Madagascar MDA/PC coverage (Therapeutic) 2015 Download map
Eastern Africa Madagascar MDA/PC rounds (Geographic) 1990 - 2016 Download map
Eastern Africa Madagascar MDA/PC coverage (Geographic) 2015 Download map
Eastern Africa Madagascar MDA/PC coverage (Therapeutic) 2016 Download map
Eastern Africa Madagascar MDA/PC coverage (Geographic) 2016 Download map
Eastern Africa Madagascar MDA/PC rounds (Therapeutic) 2013 - 2016 Download map
Eastern Africa Madagascar MDA/PC coverage (Geographic) 2013 Download map
Eastern Africa Madagascar MDA/PC rounds (Geographic) 2013 - 2016 Download map
Eastern Africa Madagascar MDA/PC coverage (Geographic) 2014 Download map
Southern Africa Malawi MDA/PC coverage (Geographic) 2013 Download map
Southern Africa Malawi 2017 Download map
Southern Africa Malawi Mapping Surveys (Nodule Palpation) 1998 Download map
Southern Africa Malawi MDA/PC rounds (Geographic) 1990 - 2016 Download map
Southern Africa Malawi MDA/PC rounds (Geographic) 2013 - 2016 Download map
Southern Africa Malawi Impact Assessment (Skin Biopsy) Download map
Southern Africa Malawi MDA/PC coverage (Geographic) 2016 Download map
Southern Africa Malawi MDA/PC coverage (Geographic) 2015 Download map
Southern Africa Malawi MDA/PC coverage (Therapeutic) 2013 Download map
Southern Africa Malawi MDA/PC rounds (Therapeutic) 2013 - 2016 Download map
Southern Africa Malawi MDA/PC coverage (Therapeutic) 2014 Download map
Southern Africa Malawi MDA/PC coverage (Therapeutic) 2015 Download map
Southern Africa Malawi MDA/PC coverage (Therapeutic) 2016 Download map
Southern Africa Malawi MDA/PC coverage (Geographic) 2014 Download map
Mali MDA/PC coverage (Therapeutic) 2014 Download map
Mali MDA/PC coverage (Therapeutic) 2015 Download map
Mali MDA/PC coverage (Geographic) 2016 Download map
Mali MDA/PC coverage (Geographic) 2013 Download map
Mali MDA/PC rounds (Therapeutic) 2013 - 2016 Download map
Mali MDA/PC coverage (Therapeutic) 2016 Download map
Mali MDA/PC rounds (Geographic) 2013 - 2016 Download map
Mali MDA/PC coverage (Therapeutic) 2013 Download map
Mali MDA/PC rounds (Geographic) 1990 - 2016 Download map
Mali MDA/PC coverage (Geographic) 2014 Download map
Mali 2017 Download map
Mali MDA/PC coverage (Geographic) 2015 Download map
Western Africa Mauritania 2017 Download map
Western Africa Mauritania MDA/PC rounds (Therapeutic) 2013 - 2016 Download map
Western Africa Mauritania MDA/PC coverage (Therapeutic) 2014 Download map
Western Africa Mauritania MDA/PC coverage (Therapeutic) 2013 Download map
Western Africa Mauritania MDA/PC coverage (Geographic) 2016 Download map
Western Africa Mauritania MDA/PC coverage (Therapeutic) 2015 Download map
Western Africa Mauritania MDA/PC coverage (Geographic) 2014 Download map
Western Africa Mauritania MDA/PC coverage (Therapeutic) 2016 Download map
Western Africa Mauritania MDA/PC rounds (Geographic) 2013 - 2016 Download map
Western Africa Mauritania MDA/PC coverage (Geographic) 2015 Download map
Western Africa Mauritania MDA/PC rounds (Geographic) 1990 - 2016 Download map
Western Africa Mauritania MDA/PC coverage (Geographic) 2013 Download map
Southern Africa Mozambique MDA/PC coverage (Geographic) 2013 Download map
Southern Africa Mozambique MDA/PC coverage (Geographic) 2014 Download map
Southern Africa Mozambique MDA/PC rounds (Therapeutic) 2013 - 2016 Download map
Southern Africa Mozambique MDA/PC rounds (Geographic) 1990 - 2016 Download map
Southern Africa Mozambique MDA/PC rounds (Geographic) 2013 - 2016 Download map
Southern Africa Mozambique MDA/PC coverage (Therapeutic) 2013 Download map
Southern Africa Mozambique MDA/PC coverage (Geographic) 2016 Download map
Southern Africa Mozambique MDA/PC coverage (Geographic) 2015 Download map
Southern Africa Mozambique MDA/PC coverage (Therapeutic) 2014 Download map
Southern Africa Mozambique MDA/PC coverage (Therapeutic) 2015 Download map
Southern Africa Mozambique 2017 Download map
Southern Africa Mozambique Mapping Surveys (Nodule Palpation) 2001 - 2007 Download map
Southern Africa Mozambique MDA/PC coverage (Therapeutic) 2016 Download map
Southern Africa Namibia MDA/PC coverage (Therapeutic) 2013 Download map
Southern Africa Namibia MDA/PC coverage (Therapeutic) 2015 Download map
Southern Africa Namibia MDA/PC coverage (Therapeutic) 2016 Download map
Southern Africa Namibia MDA/PC coverage (Geographic) 2013 Download map
Southern Africa Namibia MDA/PC coverage (Geographic) 2014 Download map
Southern Africa Namibia MDA/PC rounds (Geographic) 2013 - 2016 Download map
Southern Africa Namibia MDA/PC rounds (Geographic) 1990 - 2016 Download map
Southern Africa Namibia MDA/PC coverage (Therapeutic) 2014 Download map
Southern Africa Namibia 2017 Download map
Southern Africa Namibia MDA/PC rounds (Therapeutic) 2013 - 2016 Download map
Southern Africa Namibia MDA/PC coverage (Geographic) 2016 Download map
Southern Africa Namibia MDA/PC coverage (Geographic) 2015 Download map
Western Africa Niger MDA/PC coverage (Therapeutic) 2015 Download map
Western Africa Niger MDA/PC rounds (Geographic) 2013 - 2016 Download map
Western Africa Niger MDA/PC coverage (Geographic) 2016 Download map
Western Africa Niger MDA/PC coverage (Geographic) 2015 Download map
Western Africa Niger MDA/PC coverage (Therapeutic) 2013 Download map
Western Africa Niger MDA/PC coverage (Therapeutic) 2014 Download map
Western Africa Niger MDA/PC coverage (Therapeutic) 2016 Download map
Western Africa Niger MDA/PC coverage (Geographic) 2013 Download map
Western Africa Niger MDA/PC coverage (Geographic) 2014 Download map
Western Africa Niger MDA/PC rounds (Geographic) 1990 - 2016 Download map
Western Africa Niger MDA/PC rounds (Therapeutic) 2013 - 2016 Download map
Western Africa Niger 2017 Download map
Western Africa Nigeria Mapping Surveys (Anti-Ov16 test) 2015 Download map
Western Africa Nigeria MDA/PC coverage (Geographic) 2016 Download map
Western Africa Nigeria MDA/PC coverage (Geographic) 2015 Download map

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