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
Central Africa Central African Republic MDA/PC coverage (Geographic coverage) 2014 Download map png Download map
Central Africa Central African Republic Impact Assessment (Skin Biopsy) Download map png Download map
Central Africa Central African Republic MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Central Africa Central African Republic MDA/PC coverage (Therapeutic coverage) 2016 Download map png Download map
Central Africa Chad Mapping Surveys (Nodule Palpation) 2013 Download map png Download map
Central Africa Chad MDA/PC coverage (Geographic coverage) 2013 Download map png Download map
Central Africa Chad MDA/PC coverage (Geographic coverage) 2016 Download map png Download map
Central Africa Chad Endemicity 2017 Download map png Download map
Central Africa Chad MDA/PC coverage (Therapeutic coverage) 2015 Download map png Download map
Central Africa Chad MDA/PC coverage (Therapeutic coverage) 2016 Download map png Download map
Central Africa Chad MDA/PC rounds (Geographic coverage) 2013 - 2016 Download map png Download map
Central Africa Chad MDA/PC rounds (Therapeutic coverage) 2013 - 2016 Download map png Download map
Central Africa Chad MDA/PC coverage (Geographic coverage) 2014 Download map png Download map
Central Africa Chad MDA/PC coverage (Therapeutic coverage) 2014 Download map png Download map
Central Africa Chad MDA/PC coverage (Therapeutic coverage) 2013 Download map png Download map
Central Africa Chad Impact Assessment (Skin Biopsy) Download map png Download map
Central Africa Chad Mapping Surveys (Skin Biopsy) 2013 - 2014 Download map png Download map
Central Africa Chad MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Eastern Africa Comoros MDA/PC coverage (Therapeutic coverage) 2013 Download map png Download map
Eastern Africa Comoros MDA/PC coverage (Geographic coverage) 2016 Download map png Download map
Eastern Africa Comoros MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Eastern Africa Comoros MDA/PC rounds (Therapeutic coverage) 2013 - 2016 Download map png Download map
Eastern Africa Comoros MDA/PC coverage (Therapeutic coverage) 2014 Download map png Download map
Eastern Africa Comoros MDA/PC coverage (Therapeutic coverage) 2016 Download map png Download map
Eastern Africa Comoros MDA/PC coverage (Geographic coverage) 2013 Download map png Download map
Eastern Africa Comoros MDA/PC coverage (Geographic coverage) 2014 Download map png Download map
Eastern Africa Comoros MDA/PC coverage (Therapeutic coverage) 2015 Download map png Download map
Eastern Africa Comoros Endemicity 2017 Download map png Download map
Eastern Africa Comoros MDA/PC rounds (Geographic coverage) 2013 - 2016 Download map png Download map
Central Africa Republic of Congo Impact Assessment (Skin Biopsy) Download map png Download map
Central Africa Republic of Congo MDA/PC coverage (Therapeutic coverage) 2013 Download map png Download map
Central Africa Republic of Congo MDA/PC coverage (Therapeutic coverage) 2015 Download map png Download map
Central Africa Republic of Congo Endemicity 2017 Download map png Download map
Central Africa Republic of Congo MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Central Africa Republic of Congo MDA/PC coverage (Therapeutic coverage) 2014 Download map png Download map
Central Africa Republic of Congo Mapping Surveys (Skin Biopsy) 2014 - 2015 Download map png Download map
Central Africa Republic of Congo MDA/PC coverage (Geographic coverage) 2016 Download map png Download map
Central Africa Republic of Congo MDA/PC rounds (Therapeutic coverage) 2013 - 2016 Download map png Download map
Central Africa Republic of Congo Mapping Surveys (Nodule Palpation) 2003 Download map png Download map
Central Africa Republic of Congo MDA/PC coverage (Therapeutic coverage) 2016 Download map png Download map
Central Africa Republic of Congo MDA/PC rounds (Geographic coverage) 2013 - 2016 Download map png Download map
Central Africa Republic of Congo MDA/PC coverage (Geographic coverage) 2014 Download map png Download map
Central Africa Republic of Congo MDA/PC coverage (Geographic coverage) 2013 Download map png Download map
Central Africa Democratic Republic of the Congo Impact Assessment (Skin Biopsy) Download map png Download map
Central Africa Democratic Republic of the Congo MDA/PC coverage (Geographic coverage) 2016 Download map png Download map
Central Africa Democratic Republic of the Congo MDA/PC coverage (Therapeutic coverage) 2014 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 Democratic Republic of the Congo Endemicity 2017 Download map png Download map
Central Africa Democratic Republic of the Congo MDA/PC coverage (Therapeutic coverage) 2013 Download map png Download map
Central Africa Democratic Republic of the Congo MDA/PC rounds (Geographic coverage) 2013 - 2016 Download map png Download map
Central Africa Democratic Republic of the Congo MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Central Africa Democratic Republic of the Congo MDA/PC coverage (Geographic coverage) 2014 Download map png Download map
Central Africa Democratic Republic of the Congo MDA/PC coverage (Therapeutic coverage) 2015 Download map png Download map
Central Africa Democratic Republic of the Congo MDA/PC coverage (Geographic coverage) 2013 Download map png Download map
Central Africa Democratic Republic of the Congo MDA/PC coverage (Therapeutic coverage) 2016 Download map png Download map
Central Africa Democratic Republic of the Congo MDA/PC rounds (Therapeutic coverage) 2013 - 2016 Download map png Download map
Central Africa Democratic Republic of the Congo Mapping Surveys (Nodule Palpation) 2000 - 2014 Download map png Download map
Western Africa Cote d’Ivoire Endemicity 2017 Download map png Download map
Western Africa Cote d’Ivoire MDA/PC coverage (Therapeutic coverage) 2014 Download map png Download map
Western Africa Cote d’Ivoire MDA/PC coverage (Therapeutic coverage) 2016 Download map png Download map
Western Africa Cote d’Ivoire MDA/PC coverage (Geographic coverage) 2014 Download map png Download map
Western Africa Cote d’Ivoire MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Western Africa Cote d’Ivoire Mapping Surveys (Skin Biopsy) 2014 Download map png Download map
Western Africa Cote d’Ivoire MDA/PC rounds (Therapeutic coverage) 2013 - 2016 Download map png Download map
Western Africa Cote d’Ivoire MDA/PC coverage (Therapeutic coverage) 2015 Download map png Download map
Western Africa Cote d’Ivoire MDA/PC rounds (Geographic coverage) 2013 - 2016 Download map png Download map
Western Africa Cote d’Ivoire MDA/PC coverage (Geographic coverage) 2016 Download map png Download map
Western Africa Cote d’Ivoire MDA/PC coverage (Therapeutic coverage) 2013 Download map png Download map
Western Africa Cote d’Ivoire Mapping Surveys (Nodule Palpation) 2014 Download map png Download map
Western Africa Cote d’Ivoire MDA/PC coverage (Geographic coverage) 2013 Download map png Download map
Central Africa Equatorial Guinea MDA/PC coverage (Geographic coverage) 2013 Download map png Download map
Central Africa Equatorial Guinea Mapping Surveys (Nodule Palpation) 1999 - 2013 Download map png Download map
Central Africa Equatorial Guinea MDA/PC coverage (Geographic coverage) 2016 Download map png Download map
Central Africa Equatorial Guinea MDA/PC coverage (Therapeutic coverage) 2014 Download map png Download map
Central Africa Equatorial Guinea MDA/PC coverage (Geographic coverage) 2014 Download map png Download map
Central Africa Equatorial Guinea MDA/PC coverage (Therapeutic coverage) 2016 Download map png Download map
Central Africa Equatorial Guinea MDA/PC coverage (Therapeutic coverage) 2015 Download map png Download map
Central Africa Equatorial Guinea MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Central Africa Equatorial Guinea MDA/PC rounds (Geographic coverage) 2013 - 2016 Download map png Download map
Central Africa Equatorial Guinea MDA/PC coverage (Therapeutic coverage) 2013 Download map png Download map
Central Africa Equatorial Guinea Mapping Surveys (Skin Biopsy) 2013 - 2015 Download map png Download map
Central Africa Equatorial Guinea MDA/PC rounds (Therapeutic coverage) 2013 - 2016 Download map png Download map
Central Africa Equatorial Guinea Impact Assessment (Skin Biopsy) Download map png Download map
Central Africa Equatorial Guinea Endemicity 2017 Download map png Download map
Eritrea MDA/PC coverage (Geographic coverage) 2014 Download map png Download map
Eastern Africa Eritrea MDA/PC rounds (Therapeutic coverage) 2013 - 2016 Download map png Download map
Eritrea MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Eastern Africa Eritrea MDA/PC rounds (Geographic coverage) 2013 - 2016 Download map png Download map
Eritrea Endemicity 2017 Download map png Download map
Eritrea MDA/PC coverage (Geographic coverage) 2016 Download map png Download map
Eritrea MDA/PC coverage (Geographic coverage) 2013 Download map png Download map
Eastern Africa Ethiopia MDA/PC coverage (Geographic coverage) 2013 Download map png Download map
Eastern Africa Ethiopia MDA/PC coverage (Therapeutic coverage) 2014 Download map png Download map
Eastern Africa Ethiopia MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Eastern Africa Ethiopia MDA/PC coverage (Geographic coverage) 2016 Download map png Download map
Eastern Africa Ethiopia MDA/PC rounds (Therapeutic coverage) 2013 - 2016 Download map png Download map
Eastern Africa Ethiopia MDA/PC coverage (Therapeutic coverage) 2013 Download map png Download map
Eastern Africa Ethiopia Impact Assessment (Skin Biopsy) Download map png Download map
Eastern Africa Ethiopia Mapping Surveys (Skin Biopsy) 2012 - 2014 Download map png Download map
Eastern Africa Ethiopia MDA/PC coverage (Geographic coverage) 2014 Download map png Download map

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