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 Locationsort descending Program stage Years Maps Data
Western Africa Nigeria MDA/PC rounds (Therapeutic) 2013 - 2016 Download map
Western Africa Nigeria MDA/PC coverage (Therapeutic) 2015 Download map
Western Africa Nigeria Impact Assessment (Skin Biopsy) Download map
Western Africa Nigeria MDA/PC coverage (Therapeutic) 2016 Download map
Western Africa Nigeria 2017 Download map
Western Africa Nigeria MDA/PC coverage (Therapeutic) 2013 Download map
Western Africa Nigeria MDA/PC coverage (Geographic) 2013 Download map
Western Africa Nigeria MDA/PC coverage (Therapeutic) 2014 Download map
Western Africa Nigeria MDA/PC coverage (Geographic) 2014 Download map
Western Africa Nigeria MDA/PC rounds (Geographic) 1990 - 2016 Download map
Western Africa Nigeria Mapping Surveys (Skin Biopsy) 2015 Download map
Western Africa Nigeria Mapping Surveys (Nodule Palpation) 1989 - 2011 Download map
Western Africa Nigeria MDA/PC rounds (Geographic) 2013 - 2016 Download map
Eastern Africa Rwanda 2017 Download map
Eastern Africa Rwanda MDA/PC rounds (Geographic) 1990 - 2016 Download map
Eastern Africa Rwanda MDA/PC coverage (Geographic) 2016 Download map
Eastern Africa Rwanda MDA/PC coverage (Geographic) 2015 Download map
Eastern Africa Rwanda MDA/PC coverage (Therapeutic) 2016 Download map
Eastern Africa Rwanda Mapping Surveys (Nodule Palpation) Download map
Eastern Africa Rwanda MDA/PC coverage (Therapeutic) 2013 Download map
Eastern Africa Rwanda MDA/PC coverage (Geographic) 2013 Download map
Eastern Africa Rwanda MDA/PC coverage (Therapeutic) 2014 Download map
Eastern Africa Rwanda MDA/PC coverage (Therapeutic) 2015 Download map
Eastern Africa Rwanda MDA/PC coverage (Geographic) 2014 Download map
Eastern Africa Rwanda MDA/PC rounds (Geographic) 2013 - 2016 Download map
Eastern Africa Rwanda MDA/PC rounds (Therapeutic) 2013 - 2016 Download map
Central Africa Sao Tome & Principe MDA/PC coverage (Geographic) 2016 Download map
Central Africa Sao Tome & Principe MDA/PC coverage (Geographic) 2015 Download map
Central Africa Sao Tome & Principe MDA/PC rounds (Geographic) 1990 - 2016 Download map
Central Africa Sao Tome & Principe MDA/PC rounds (Geographic) 2013 - 2016 Download map
Central Africa Sao Tome & Principe MDA/PC rounds (Therapeutic) 2013 - 2016 Download map
Central Africa Sao Tome & Principe MDA/PC coverage (Therapeutic) 2016 Download map
Central Africa Sao Tome & Principe MDA/PC coverage (Therapeutic) 2013 Download map
Central Africa Sao Tome & Principe MDA/PC coverage (Therapeutic) 2014 Download map
Central Africa Sao Tome & Principe MDA/PC coverage (Geographic) 2013 Download map
Central Africa Sao Tome & Principe 2017 Download map
Central Africa Sao Tome & Principe MDA/PC coverage (Geographic) 2014 Download map
Central Africa Sao Tome & Principe MDA/PC coverage (Therapeutic) 2015 Download map
Western Africa Senegal MDA/PC coverage (Therapeutic) 2016 Download map
Western Africa Senegal MDA/PC coverage (Therapeutic) 2013 Download map
Western Africa Senegal MDA/PC coverage (Therapeutic) 2014 Download map
Western Africa Senegal MDA/PC coverage (Geographic) 2013 Download map
Western Africa Senegal MDA/PC coverage (Geographic) 2014 Download map
Western Africa Senegal MDA/PC coverage (Therapeutic) 2015 Download map
Western Africa Senegal 2017 Download map
Western Africa Senegal MDA/PC coverage (Geographic) 2015 Download map
Western Africa Senegal MDA/PC coverage (Geographic) 2016 Download map
Western Africa Senegal MDA/PC rounds (Geographic) 2013 - 2016 Download map
Western Africa Senegal MDA/PC rounds (Therapeutic) 2013 - 2016 Download map
Western Africa Senegal MDA/PC rounds (Geographic) 1990 - 2016 Download map
Eastern Africa Seychelles MDA/PC coverage (Therapeutic) 2016 Download map
Eastern Africa Seychelles 2017 Download map
Eastern Africa Seychelles MDA/PC rounds (Geographic) 1990 - 2016 Download map
Eastern Africa Seychelles MDA/PC coverage (Geographic) 2016 Download map
Eastern Africa Seychelles MDA/PC coverage (Geographic) 2015 Download map
Eastern Africa Seychelles MDA/PC rounds (Geographic) 2013 - 2016 Download map
Eastern Africa Seychelles MDA/PC rounds (Therapeutic) 2013 - 2016 Download map
Eastern Africa Seychelles MDA/PC coverage (Therapeutic) 2013 Download map
Eastern Africa Seychelles MDA/PC coverage (Geographic) 2013 Download map
Eastern Africa Seychelles MDA/PC coverage (Therapeutic) 2014 Download map
Eastern Africa Seychelles MDA/PC coverage (Therapeutic) 2015 Download map
Eastern Africa Seychelles MDA/PC coverage (Geographic) 2014 Download map
Western Africa Sierra Leone MDA/PC coverage (Geographic) 2014 Download map
Western Africa Sierra Leone MDA/PC rounds (Geographic) 1990 - 2016 Download map
Western Africa Sierra Leone MDA/PC rounds (Geographic) 2013 - 2016 Download map
Western Africa Sierra Leone MDA/PC rounds (Therapeutic) 2013 - 2016 Download map
Western Africa Sierra Leone MDA/PC coverage (Therapeutic) 2015 Download map
Western Africa Sierra Leone MDA/PC coverage (Geographic) 2016 Download map
Western Africa Sierra Leone MDA/PC coverage (Geographic) 2015 Download map
Western Africa Sierra Leone MDA/PC coverage (Therapeutic) 2016 Download map
Western Africa Sierra Leone MDA/PC coverage (Therapeutic) 2013 Download map
Western Africa Sierra Leone 2017 Download map
Western Africa Sierra Leone MDA/PC coverage (Therapeutic) 2014 Download map
Western Africa Sierra Leone MDA/PC coverage (Geographic) 2013 Download map
Southern Africa South Africa MDA/PC coverage (Therapeutic) 2016 Download map
Southern Africa South Africa MDA/PC rounds (Geographic) 2013 - 2016 Download map
Southern Africa South Africa MDA/PC coverage (Therapeutic) 2013 Download map
Southern Africa South Africa MDA/PC coverage (Therapeutic) 2014 Download map
Southern Africa South Africa MDA/PC coverage (Geographic) 2013 Download map
Southern Africa South Africa MDA/PC coverage (Therapeutic) 2015 Download map
Southern Africa South Africa MDA/PC coverage (Geographic) 2014 Download map
Southern Africa South Africa MDA/PC rounds (Geographic) 1990 - 2016 Download map
Southern Africa South Africa MDA/PC rounds (Therapeutic) 2013 - 2016 Download map
Southern Africa South Africa MDA/PC coverage (Geographic) 2015 Download map
Southern Africa South Africa MDA/PC coverage (Geographic) 2016 Download map
Southern Africa South Africa 2017 Download map
Eastern Africa South Sudan MDA/PC coverage (Geographic) 2015 Download map
Eastern Africa South Sudan MDA/PC coverage (Geographic) 2016 Download map
Eastern Africa South Sudan MDA/PC coverage (Therapeutic) 2016 Download map
Eastern Africa South Sudan MDA/PC coverage (Therapeutic) 2013 Download map
Eastern Africa South Sudan MDA/PC coverage (Therapeutic) 2014 Download map
Eastern Africa South Sudan MDA/PC coverage (Geographic) 2013 Download map
Eastern Africa South Sudan MDA/PC coverage (Geographic) 2014 Download map
Eastern Africa South Sudan Mapping Surveys (Nodule Palpation) 1996 - 2008 Download map
Eastern Africa South Sudan MDA/PC coverage (Therapeutic) 2015 Download map
Eastern Africa South Sudan 2017 Download map
Eastern Africa South Sudan MDA/PC rounds (Geographic) 1990 - 2016 Download map
Eastern Africa South Sudan MDA/PC rounds (Geographic) 2013 - 2016 Download map
Eastern Africa South Sudan MDA/PC rounds (Therapeutic) 2013 - 2016 Download map
Southern Africa eSwatini MDA/PC rounds (Therapeutic) 2013 - 2016 Download map

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