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
Region Program stage Years Maps Data
Western Africa Mapping Surveys (Skin Biopsy) 2012 - 2015 Download map png Download map
Eastern Africa Mapping Surveys (Nodule Palpation) 1989 - 2014 Download map png Download map
Southern Africa Mapping Surveys (Nodule Palpation) 1989 - 2014 Download map png Download map
WHO African Region (AFRO) Impact Assessment (Skin Biopsy) Download map png Download map
Western Africa Mapping Surveys (Anti-Ov16 test) 2015 Download map png Download map
Eastern Africa Mapping Surveys (Anti-Ov16 test) 2015 Download map png Download map
Africa Continent Mapping Surveys (Skin Biopsy) 2012 - 2015 Download map png Download map
Western Africa Impact Assessment (Skin Biopsy) Download map png Download map
Central Africa Mapping Surveys (Nodule Palpation) 1989 - 2014 Download map png Download map
WHO African Region (AFRO) Mapping Surveys (Skin Biopsy) 2012 - 2015 Download map png Download map
Africa Continent Mapping Surveys (Nodule Palpation) 1989 - 2014 Download map png Download map
Central Africa Impact Assessment (Skin Biopsy) Download map png Download map
Central Africa Mapping Surveys (Anti-Ov16 test) 2015 Download map png Download map
WHO African Region (AFRO) Mapping Surveys (Nodule Palpation) 1989 - 2014 Download map png Download map
Africa Continent Mapping Surveys (Anti-Ov16 test) 2015 Download map png Download map
Southern Africa Impact Assessment (Skin Biopsy) Download map png Download map
Central Africa Mapping Surveys (Skin Biopsy) 2012 - 2015 Download map png Download map
WHO African Region (AFRO) Mapping Surveys (Anti-Ov16 test) 2015 Download map png Download map
Africa Continent Impact Assessment (Skin Biopsy) Download map png Download map
Southern Africa Mapping Surveys (Anti-Ov16 test) 2015 Download map png Download map
Western Africa Mapping Surveys (Nodule Palpation) 1989 - 2014 Download map png Download map
Eastern Africa Mapping Surveys (Skin Biopsy) 2012 - 2015 Download map png Download map
Southern Africa Mapping Surveys (Skin Biopsy) 2012 - 2015 Download map png Download map
Eastern Africa Impact Assessment (Skin Biopsy) Download map png Download map
Central Africa MDA/PC rounds (Geographic) 1990 - 2016 Download map png Download map
Western Africa MDA/PC coverage (Therapeutic) 2015 Download map png Download map
Eastern Africa MDA/PC coverage (Therapeutic) 2016 Download map png Download map
Eastern Africa Endemicity 2017 Download map png Download map
Southern Africa MDA/PC coverage (Geographic) 2013 Download map png Download map
Southern Africa MDA/PC coverage (Therapeutic) 2016 Download map png Download map
Eastern Africa MDA/PC coverage (Therapeutic) 2014 Download map png Download map
Eastern Africa MDA/PC rounds (Therapeutic) 2013 - 2016 Download map png Download map
Western Africa MDA/PC coverage (Therapeutic) 2016 Download map png Download map
Central Africa MDA/PC coverage (Therapeutic) 2015 Download map png Download map
Africa Continent MDA/PC coverage (Geographic) 2013 Download map png Download map
WHO African Region (AFRO) MDA/PC coverage (Therapeutic) 2014 Download map png Download map
Southern Africa MDA/PC rounds (Therapeutic) 2013 - 2016 Download map png Download map
Western Africa MDA/PC coverage (Therapeutic) 2013 Download map png Download map
WHO African Region (AFRO) Endemicity 2017 Download map png Download map
Southern Africa MDA/PC coverage (Therapeutic) 2014 Download map png Download map
Eastern Africa MDA/PC coverage (Geographic) 2015 Download map png Download map
WHO African Region (AFRO) MDA/PC rounds (Geographic) 1990 - 2016 Download map png Download map
Western Africa MDA/PC coverage (Geographic) 2016 Download map png Download map
Central Africa MDA/PC coverage (Therapeutic) 2013 Download map png Download map
Africa Continent MDA/PC coverage (Geographic) 2016 Download map png Download map
WHO African Region (AFRO) MDA/PC coverage (Geographic) 2013 Download map png Download map
Southern Africa MDA/PC rounds (Geographic) 1990 - 2016 Download map png Download map
Central Africa MDA/PC coverage (Geographic) 2013 Download map png Download map
Western Africa Endemicity 2017 Download map png Download map
Southern Africa MDA/PC coverage (Therapeutic) 2013 Download map png Download map
Eastern Africa MDA/PC coverage (Geographic) 2013 Download map png Download map
WHO African Region (AFRO) MDA/PC rounds (Therapeutic) 2013 - 2016 Download map png Download map
Western Africa MDA/PC coverage (Geographic) 2013 Download map png Download map
Central Africa MDA/PC coverage (Therapeutic) 2016 Download map png Download map
Africa Continent MDA/PC coverage (Geographic) 2014 Download map png Download map
WHO African Region (AFRO) MDA/PC coverage (Therapeutic) 2013 Download map png Download map
Africa Continent MDA/PC rounds (Therapeutic) 2013 - 2016 Download map png Download map
Central Africa MDA/PC coverage (Geographic) 2014 Download map png Download map
Central Africa Endemicity 2017 Download map png Download map
Southern Africa MDA/PC coverage (Therapeutic) 2015 Download map png Download map
Eastern Africa MDA/PC coverage (Geographic) 2016 Download map png Download map
Western Africa MDA/PC rounds (Therapeutic) 2013 - 2016 Download map png Download map
Western Africa MDA/PC coverage (Geographic) 2015 Download map png Download map
Southern Africa MDA/PC coverage (Geographic) 2014 Download map png Download map
Africa Continent MDA/PC coverage (Therapeutic) 2013 Download map png Download map
WHO African Region (AFRO) MDA/PC coverage (Geographic) 2014 Download map png Download map
Central Africa MDA/PC coverage (Geographic) 2015 Download map png Download map
Africa Continent MDA/PC rounds (Geographic) 1990 - 2016 Download map png Download map
Southern Africa Endemicity 2017 Download map png Download map
Africa Continent MDA/PC coverage (Therapeutic) 2014 Download map png Download map
Eastern Africa MDA/PC coverage (Geographic) 2014 Download map png Download map
Western Africa MDA/PC rounds (Geographic) 1990 - 2016 Download map png Download map
Western Africa MDA/PC coverage (Geographic) 2014 Download map png Download map
Eastern Africa MDA/PC coverage (Therapeutic) 2015 Download map png Download map
Southern Africa MDA/PC coverage (Geographic) 2015 Download map png Download map
Africa Continent MDA/PC coverage (Therapeutic) 2016 Download map png Download map
WHO African Region (AFRO) MDA/PC coverage (Therapeutic) 2015 Download map png Download map
Central Africa MDA/PC coverage (Geographic) 2016 Download map png Download map
Africa Continent Endemicity 2017 Download map png Download map
Africa Continent MDA/PC coverage (Geographic) 2015 Download map png Download map
WHO African Region (AFRO) MDA/PC coverage (Therapeutic) 2016 Download map png Download map
Central Africa MDA/PC rounds (Therapeutic) 2013 - 2016 Download map png Download map
Western Africa MDA/PC coverage (Therapeutic) 2014 Download map png Download map
Eastern Africa MDA/PC coverage (Therapeutic) 2013 Download map png Download map
Southern Africa MDA/PC coverage (Geographic) 2016 Download map png Download map
Eastern Africa MDA/PC rounds (Geographic) 1990 - 2016 Download map png Download map
WHO African Region (AFRO) MDA/PC coverage (Geographic) 2015 Download map png Download map
Central Africa MDA/PC coverage (Therapeutic) 2014 Download map png Download map
Africa Continent MDA/PC coverage (Therapeutic) 2015 Download map png Download map
WHO African Region (AFRO) MDA/PC coverage (Geographic) 2016 Download map png Download map
574 maps found
Region Location Program stage Years Maps Data
Central Africa Equatorial Guinea Mapping Surveys (Skin Biopsy) 2013 - 2015 Download map png Download map
Southern Africa Malawi Impact Assessment (Skin Biopsy) Download map png Download map
Western Africa Cote d’Ivoire Mapping Surveys (Nodule Palpation) 2014 Download map png Download map
Central Africa Equatorial Guinea Mapping Surveys (Nodule Palpation) 1999 - 2013 Download map png Download map
Central Africa Burundi Mapping Surveys (Skin Biopsy) 2013 Download map png Download map
Central Africa Central African Republic Impact Assessment (Skin Biopsy) Download map png Download map
Central Africa Angola Mapping Surveys (Nodule Palpation) 2002 - 2011 Download map png Download map
Western Africa Nigeria Mapping Surveys (Nodule Palpation) 1989 - 2011 Download map png Download map
Eastern Africa Ethiopia Mapping Surveys (Skin Biopsy) 2012 - 2014 Download map png Download map
Western Africa Nigeria Impact Assessment (Skin Biopsy) Download map png Download map
Eastern Africa Ethiopia Mapping Surveys (Nodule Palpation) 2001 - 2012 Download map png Download map
Central Africa Cameroon Mapping Surveys (Skin Biopsy) 2013 Download map png Download map
Central Africa Chad Impact Assessment (Skin Biopsy) Download map png Download map
Central Africa Burundi Mapping Surveys (Nodule Palpation) 2001 - 2013 Download map png Download map
Eastern Africa Rwanda Mapping Surveys (Nodule Palpation) Download map png Download map
Central Africa Gabon Mapping Surveys (Skin Biopsy) 2014 - 2015 Download map png Download map
Eastern Africa Tanzania (Mainland) Impact Assessment (Skin Biopsy) Download map png Download map
Central Africa Gabon Mapping Surveys (Nodule Palpation) 1999 - 2014 Download map png Download map
Central Africa Chad Mapping Surveys (Skin Biopsy) 2013 - 2014 Download map png Download map
Central Africa Republic of Congo Impact Assessment (Skin Biopsy) Download map png Download map
Central Africa Cameroon Mapping Surveys (Nodule Palpation) 1993 - 2013 Download map png Download map
Eastern Africa South Sudan Mapping Surveys (Nodule Palpation) 1996 - 2008 Download map png Download map
Western Africa Nigeria Mapping Surveys (Skin Biopsy) 2015 Download map png Download map
Eastern Africa Uganda Impact Assessment (Skin Biopsy) Download map png Download map
Eastern Africa Kenya Mapping Surveys (Nodule Palpation) Download map png Download map
Central Africa Republic of Congo Mapping Surveys (Skin Biopsy) 2014 - 2015 Download map png Download map
Central Africa Democratic Republic of the Congo Impact Assessment (Skin Biopsy) Download map png Download map
Central Africa Central African Republic Mapping Surveys (Nodule Palpation) 1999 - 2001 Download map png Download map
Eastern Africa Tanzania (Mainland) Mapping Surveys (Nodule Palpation) 1996 - 2012 Download map png Download map
Central Africa Democratic Republic of the Congo Mapping Surveys (Anti-Ov16 test) 2015 Download map png Download map
Eastern Africa Tanzania (Mainland) Mapping Surveys (Skin Biopsy) 2014 Download map png Download map
Central Africa Chad Mapping Surveys (Nodule Palpation) 2013 Download map png Download map
Central Africa Democratic Republic of the Congo Mapping Surveys (Skin Biopsy) 2014 - 2015 Download map png Download map
Central Africa Equatorial Guinea Impact Assessment (Skin Biopsy) Download map png Download map
Central Africa Republic of Congo Mapping Surveys (Nodule Palpation) 2003 Download map png Download map
Eastern Africa Uganda Mapping Surveys (Nodule Palpation) 2008 Download map png Download map
Central Africa Burundi Impact Assessment (Skin Biopsy) Download map png Download map
Central Africa Gabon Mapping Surveys (Anti-Ov16 test) 2015 Download map png Download map
Southern Africa Malawi Mapping Surveys (Nodule Palpation) 1998 Download map png Download map
Western Africa Cote d’Ivoire Mapping Surveys (Skin Biopsy) 2014 Download map png Download map
Eastern Africa Ethiopia Impact Assessment (Skin Biopsy) Download map png Download map
Central Africa Democratic Republic of the Congo Mapping Surveys (Nodule Palpation) 2000 - 2014 Download map png Download map
Central Africa Angola Mapping Surveys (Skin Biopsy) 2015 Download map png Download map
Central Africa Cameroon Impact Assessment (Skin Biopsy) Download map png Download map
Western Africa Nigeria Mapping Surveys (Anti-Ov16 test) 2015 Download map png Download map
Southern Africa Mozambique Mapping Surveys (Nodule Palpation) 2001 - 2007 Download map png Download map
Central Africa Sao Tome & Principe MDA/PC coverage (Geographic) 2016 Download map png Download map
Southern Africa Mozambique MDA/PC coverage (Therapeutic) 2014 Download map png Download map
Western Africa Togo MDA/PC coverage (Therapeutic) 2014 Download map png Download map
Southern Africa eSwatini MDA/PC rounds (Geographic) 2013 - 2016 Download map png Download map
Southern Africa Mozambique MDA/PC rounds (Therapeutic) 2013 - 2016 Download map png Download map
Western Africa Cote d’Ivoire MDA/PC coverage (Therapeutic) 2016 Download map png Download map
Eastern Africa Ethiopia MDA/PC coverage (Therapeutic) 2016 Download map png Download map
Central Africa Equatorial Guinea MDA/PC coverage (Geographic) 2014 Download map png Download map
Western Africa Benin MDA/PC coverage (Geographic) 2014 Download map png Download map
Eastern Africa South Sudan Endemicity 2017 Download map png Download map
Southern Africa Mozambique MDA/PC coverage (Geographic) 2014 Download map png Download map
Southern Africa Namibia MDA/PC rounds (Geographic) 1990 - 2016 Download map png Download map
Western Africa Nigeria MDA/PC rounds (Geographic) 1990 - 2016 Download map png Download map
Western Africa Togo MDA/PC coverage (Geographic) 2015 Download map png Download map
Central Africa Equatorial Guinea MDA/PC coverage (Therapeutic) 2013 Download map png Download map
Western Africa Cape Verde MDA/PC rounds (Geographic) 2013 - 2016 Download map png Download map
Central Africa Democratic Republic of the Congo MDA/PC rounds (Therapeutic) 2013 - 2016 Download map png Download map
Central Africa Chad MDA/PC coverage (Therapeutic) 2015 Download map png Download map
Central Africa Chad MDA/PC coverage (Therapeutic) 2016 Download map png Download map
Central Africa Republic of Congo MDA/PC coverage (Geographic) 2015 Download map png Download map
Central Africa Sao Tome & Principe MDA/PC coverage (Geographic) 2013 Download map png Download map
Southern Africa Malawi MDA/PC coverage (Therapeutic) 2015 Download map png Download map
Central Africa Sao Tome & Principe MDA/PC coverage (Therapeutic) 2015 Download map png Download map
Western Africa Cote d’Ivoire Endemicity 2017 Download map png Download map
Eastern Africa South Sudan MDA/PC coverage (Geographic) 2013 Download map png Download map
Western Africa Algeria MDA/PC coverage (Geographic) 2013 Download map png Download map
Southern Africa eSwatini Endemicity 2017 Download map png Download map
Eastern Africa Kenya MDA/PC coverage (Geographic) 2015 Download map png Download map
Western Africa Burkina Faso MDA/PC rounds (Geographic) 1990 - 2016 Download map png Download map
Western Africa Algeria MDA/PC rounds (Geographic) 2013 - 2016 Download map png Download map
Western Africa Cape Verde MDA/PC coverage (Geographic) 2015 Download map png Download map
Central Africa Sao Tome & Principe MDA/PC coverage (Therapeutic) 2016 Download map png Download map
Western Africa Cape Verde MDA/PC rounds (Geographic) 1990 - 2016 Download map png Download map
Eastern Africa Madagascar MDA/PC coverage (Geographic) 2016 Download map png Download map
Central Africa Cameroon MDA/PC coverage (Therapeutic) 2014 Download map png Download map
Central Africa Cameroon MDA/PC coverage (Geographic) 2013 Download map png Download map
Eastern Africa Tanzania (Zanzibar) MDA/PC coverage (Geographic) 2014 Download map png Download map
Western Africa Algeria MDA/PC coverage (Therapeutic) 2013 Download map png Download map
Eastern Africa Ethiopia Endemicity 2017 Download map png Download map
Western Africa Ghana MDA/PC rounds (Therapeutic) 2013 - 2016 Download map png Download map
Southern Africa Botswana MDA/PC coverage (Therapeutic) 2013 Download map png Download map
Eastern Africa Kenya MDA/PC coverage (Therapeutic) 2014 Download map png Download map
Southern Africa Mozambique MDA/PC coverage (Therapeutic) 2015 Download map png Download map
Southern Africa Lesotho MDA/PC coverage (Geographic) 2016 Download map png Download map
Eastern Africa Tanzania (Zanzibar) MDA/PC rounds (Geographic) 2013 - 2016 Download map png Download map
Central Africa Gabon MDA/PC rounds (Therapeutic) 2013 - 2016 Download map png Download map
Western Africa Cape Verde MDA/PC coverage (Therapeutic) 2014 Download map png Download map
Eastern Africa Tanzania (Zanzibar) MDA/PC coverage (Therapeutic) 2013 Download map png Download map
Western Africa Niger Endemicity 2017 Download map png Download map
Western Africa Sierra Leone MDA/PC coverage (Geographic) 2014 Download map png Download map
Eastern Africa Comoros MDA/PC rounds (Geographic) 1990 - 2016 Download map png Download map
Southern Africa South Africa MDA/PC rounds (Geographic) 1990 - 2016 Download map png Download map
Central Africa Central African Republic MDA/PC coverage (Geographic) 2016 Download map png Download map
Southern Africa Lesotho MDA/PC coverage (Therapeutic) 2013 Download map png Download map

Pages

Data download