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
Eastern Africa Ethiopia MDA/PC coverage (Therapeutic coverage) 2015 Download map png Download map
Eastern Africa Ethiopia MDA/PC coverage (Therapeutic coverage) 2016 Download map png Download map
Eastern Africa Ethiopia Mapping Surveys (Nodule Palpation) 2001 - 2012 Download map png Download map
Eastern Africa Ethiopia MDA/PC rounds (Geographic coverage) 2013 - 2016 Download map png Download map
Eastern Africa Ethiopia Endemicity 2017 Download map png Download map
Central Africa Gabon MDA/PC coverage (Therapeutic coverage) 2014 Download map png Download map
Central Africa Gabon Mapping Surveys (Skin Biopsy) 2014 - 2015 Download map png Download map
Central Africa Gabon Endemicity 2017 Download map png Download map
Central Africa Gabon MDA/PC coverage (Therapeutic coverage) 2015 Download map png Download map
Central Africa Gabon MDA/PC coverage (Therapeutic coverage) 2013 Download map png Download map
Central Africa Gabon MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Central Africa Gabon MDA/PC coverage (Therapeutic coverage) 2016 Download map png Download map
Central Africa Gabon MDA/PC coverage (Geographic coverage) 2016 Download map png Download map
Central Africa Gabon MDA/PC coverage (Geographic coverage) 2014 Download map png Download map
Central Africa Gabon MDA/PC rounds (Geographic coverage) 2013 - 2016 Download map png Download map
Central Africa Gabon Mapping Surveys (Nodule Palpation) 1999 - 2014 Download map png Download map
Central Africa Gabon MDA/PC rounds (Therapeutic coverage) 2013 - 2016 Download map png Download map
Central Africa Gabon MDA/PC coverage (Geographic coverage) 2013 Download map png Download map
Western Africa Ghana MDA/PC coverage (Geographic coverage) 2014 Download map png Download map
Western Africa Ghana MDA/PC coverage (Therapeutic coverage) 2015 Download map png Download map
Western Africa Ghana MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Western Africa Ghana MDA/PC rounds (Geographic coverage) 2013 - 2016 Download map png Download map
Western Africa Ghana MDA/PC coverage (Geographic coverage) 2016 Download map png Download map
Western Africa Ghana MDA/PC coverage (Therapeutic coverage) 2013 Download map png Download map
Western Africa Ghana MDA/PC coverage (Geographic coverage) 2013 Download map png Download map
Western Africa Ghana Endemicity 2017 Download map png Download map
Western Africa Ghana MDA/PC coverage (Therapeutic coverage) 2014 Download map png Download map
Western Africa Ghana MDA/PC coverage (Therapeutic coverage) 2016 Download map png Download map
Western Africa Ghana MDA/PC rounds (Therapeutic coverage) 2013 - 2016 Download map png Download map
Western Africa Guinea MDA/PC coverage (Geographic coverage) 2016 Download map png Download map
Western Africa Guinea MDA/PC coverage (Geographic coverage) 2013 Download map png Download map
Western Africa Guinea MDA/PC rounds (Therapeutic coverage) 2013 - 2016 Download map png Download map
Western Africa Guinea MDA/PC coverage (Therapeutic coverage) 2013 Download map png Download map
Western Africa Guinea MDA/PC coverage (Therapeutic coverage) 2015 Download map png Download map
Western Africa Guinea MDA/PC coverage (Therapeutic coverage) 2014 Download map png Download map
Western Africa Guinea Endemicity 2017 Download map png Download map
Western Africa Guinea MDA/PC rounds (Geographic coverage) 2013 - 2016 Download map png Download map
Western Africa Guinea MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Western Africa Guinea MDA/PC coverage (Geographic coverage) 2014 Download map png Download map
Western Africa Guinea MDA/PC coverage (Therapeutic coverage) 2016 Download map png Download map
Western Africa Guinea-Bissau Endemicity 2017 Download map png Download map
Western Africa Guinea-Bissau MDA/PC coverage (Therapeutic coverage) 2013 Download map png Download map
Western Africa Guinea-Bissau MDA/PC rounds (Therapeutic coverage) 2013 - 2016 Download map png Download map
Western Africa Guinea-Bissau MDA/PC coverage (Therapeutic coverage) 2015 Download map png Download map
Western Africa Guinea-Bissau MDA/PC coverage (Geographic coverage) 2016 Download map png Download map
Western Africa Guinea-Bissau MDA/PC rounds (Geographic coverage) 2013 - 2016 Download map png Download map
Western Africa Guinea-Bissau MDA/PC coverage (Therapeutic coverage) 2016 Download map png Download map
Western Africa Guinea-Bissau MDA/PC coverage (Geographic coverage) 2014 Download map png Download map
Western Africa Guinea-Bissau MDA/PC coverage (Geographic coverage) 2013 Download map png Download map
Western Africa Guinea-Bissau MDA/PC coverage (Therapeutic coverage) 2014 Download map png Download map
Western Africa Guinea-Bissau MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Eastern Africa Kenya MDA/PC coverage (Therapeutic coverage) 2014 Download map png Download map
Eastern Africa Kenya Endemicity 2017 Download map png Download map
Eastern Africa Kenya MDA/PC coverage (Therapeutic coverage) 2013 Download map png Download map
Eastern Africa Kenya MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Eastern Africa Kenya MDA/PC rounds (Geographic coverage) 2013 - 2016 Download map png Download map
Eastern Africa Kenya MDA/PC coverage (Geographic coverage) 2014 Download map png Download map
Eastern Africa Kenya MDA/PC rounds (Therapeutic coverage) 2013 - 2016 Download map png Download map
Eastern Africa Kenya MDA/PC coverage (Therapeutic coverage) 2015 Download map png Download map
Eastern Africa Kenya MDA/PC coverage (Geographic coverage) 2016 Download map png Download map
Eastern Africa Kenya MDA/PC coverage (Geographic coverage) 2013 Download map png Download map
Eastern Africa Kenya MDA/PC coverage (Therapeutic coverage) 2016 Download map png Download map
Eastern Africa Kenya Mapping Surveys (Nodule Palpation) Download map png Download map
Southern Africa Lesotho MDA/PC coverage (Therapeutic coverage) 2014 Download map png Download map
Southern Africa Lesotho MDA/PC coverage (Geographic coverage) 2016 Download map png Download map
Southern Africa Lesotho MDA/PC coverage (Therapeutic coverage) 2015 Download map png Download map
Southern Africa Lesotho Endemicity 2017 Download map png Download map
Southern Africa Lesotho MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Southern Africa Lesotho MDA/PC rounds (Geographic coverage) 2013 - 2016 Download map png Download map
Southern Africa Lesotho MDA/PC coverage (Therapeutic coverage) 2013 Download map png Download map
Southern Africa Lesotho MDA/PC coverage (Therapeutic coverage) 2016 Download map png Download map
Southern Africa Lesotho MDA/PC coverage (Geographic coverage) 2013 Download map png Download map
Southern Africa Lesotho MDA/PC coverage (Geographic coverage) 2014 Download map png Download map
Southern Africa Lesotho MDA/PC rounds (Therapeutic coverage) 2013 - 2016 Download map png Download map
Western Africa Liberia MDA/PC rounds (Geographic coverage) 2013 - 2016 Download map png Download map
Western Africa Liberia Mapping Surveys (Nodule Palpation) 1998 Download map png Download map
Western Africa Liberia Impact Assessment (Skin Biopsy) Download map png Download map
Western Africa Liberia MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Western Africa Liberia MDA/PC coverage (Geographic coverage) 2016 Download map png Download map
Western Africa Liberia MDA/PC coverage (Geographic coverage) 2013 Download map png Download map
Western Africa Liberia MDA/PC rounds (Therapeutic coverage) 2013 - 2016 Download map png Download map
Western Africa Liberia MDA/PC coverage (Geographic coverage) 2014 Download map png Download map
Western Africa Liberia Endemicity 2017 Download map png Download map
Eastern Africa Madagascar MDA/PC coverage (Therapeutic coverage) 2014 Download map png Download map
Eastern Africa Madagascar MDA/PC rounds (Therapeutic coverage) 2013 - 2016 Download map png Download map
Eastern Africa Madagascar MDA/PC coverage (Geographic coverage) 2016 Download map png Download map
Eastern Africa Madagascar MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Eastern Africa Madagascar MDA/PC coverage (Geographic coverage) 2014 Download map png Download map
Eastern Africa Madagascar MDA/PC coverage (Therapeutic coverage) 2016 Download map png Download map
Eastern Africa Madagascar MDA/PC coverage (Geographic coverage) 2013 Download map png Download map
Eastern Africa Madagascar Endemicity 2017 Download map png Download map
Eastern Africa Madagascar MDA/PC rounds (Geographic coverage) 2013 - 2016 Download map png Download map
Eastern Africa Madagascar MDA/PC coverage (Therapeutic coverage) 2015 Download map png Download map
Eastern Africa Madagascar MDA/PC coverage (Therapeutic coverage) 2013 Download map png Download map
Southern Africa Malawi MDA/PC coverage (Therapeutic coverage) 2015 Download map png Download map
Southern Africa Malawi MDA/PC coverage (Therapeutic coverage) 2016 Download map png Download map
Southern Africa Malawi MDA/PC coverage (Geographic coverage) 2016 Download map png Download map
Southern Africa Malawi MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Southern Africa Malawi MDA/PC rounds (Therapeutic coverage) 2013 - 2016 Download map png Download map
Southern Africa Malawi MDA/PC coverage (Geographic coverage) 2014 Download map png Download map

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