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
Regionsort descending Country Program stage Years Maps Data
Southern Africa Lesotho MDA/PC coverage (Geographic coverage) 2016 Download map png Download map
Southern Africa Zimbabwe MDA/PC coverage (Therapeutic coverage) 2013 Download map png Download map
Southern Africa Zambia MDA/PC rounds (Therapeutic coverage) 2013 - 2016 Download map png Download map
Southern Africa South Africa MDA/PC coverage (Geographic coverage) 2014 Download map png Download map
Southern Africa Namibia MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Southern Africa Botswana MDA/PC rounds (Therapeutic coverage) 2013 - 2016 Download map png Download map
Southern Africa Zambia Endemicity 2017 Download map png Download map
Southern Africa Zambia MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Southern Africa Malawi MDA/PC coverage (Therapeutic coverage) 2016 Download map png Download map
Southern Africa Zambia MDA/PC coverage (Therapeutic coverage) 2015 Download map png Download map
Southern Africa eSwatini MDA/PC coverage (Therapeutic coverage) 2016 Download map png Download map
Southern Africa Mozambique Endemicity 2017 Download map png Download map
Southern Africa Malawi MDA/PC coverage (Geographic coverage) 2016 Download map png Download map
Southern Africa Mozambique 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 Zambia MDA/PC coverage (Therapeutic coverage) 2014 Download map png Download map
Southern Africa Zimbabwe MDA/PC rounds (Therapeutic coverage) 2013 - 2016 Download map png Download map
Southern Africa South Africa MDA/PC coverage (Therapeutic coverage) 2014 Download map png Download map
Southern Africa Zambia MDA/PC coverage (Therapeutic coverage) 2016 Download map png Download map
Southern Africa Lesotho Endemicity 2017 Download map png Download map
Southern Africa Malawi MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Southern Africa eSwatini MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Southern Africa Zambia MDA/PC coverage (Geographic coverage) 2013 Download map png Download map
Southern Africa South Africa MDA/PC coverage (Therapeutic coverage) 2016 Download map png Download map
Southern Africa eSwatini MDA/PC rounds (Geographic coverage) 2013 - 2016 Download map png Download map
Southern Africa Mozambique MDA/PC rounds (Geographic coverage) 2013 - 2016 Download map png Download map
Southern Africa Botswana MDA/PC coverage (Therapeutic coverage) 2013 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
Southern Africa Botswana MDA/PC coverage (Therapeutic coverage) 2015 Download map png Download map
Southern Africa Namibia MDA/PC coverage (Therapeutic coverage) 2016 Download map png Download map
Southern Africa Zimbabwe Endemicity 2017 Download map png Download map
Southern Africa Namibia MDA/PC coverage (Geographic coverage) 2016 Download map png Download map
Southern Africa eSwatini MDA/PC rounds (Therapeutic coverage) 2013 - 2016 Download map png Download map
Southern Africa Botswana Endemicity 2017 Download map png Download map
Southern Africa Mozambique MDA/PC coverage (Therapeutic coverage) 2013 Download map png Download map
Southern Africa Zambia MDA/PC rounds (Geographic coverage) 2013 - 2016 Download map png Download map
Southern Africa South Africa Endemicity 2017 Download map png Download map
Southern Africa Lesotho MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Southern Africa Zimbabwe MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Southern Africa Mozambique MDA/PC coverage (Therapeutic coverage) 2015 Download map png Download map
Southern Africa South Africa MDA/PC coverage (Therapeutic coverage) 2015 Download map png Download map
Southern Africa Zimbabwe MDA/PC rounds (Geographic coverage) 2013 - 2016 Download map png Download map
Southern Africa South Africa MDA/PC coverage (Geographic coverage) 2016 Download map png Download map
Southern Africa Namibia Endemicity 2017 Download map png Download map
Southern Africa eSwatini MDA/PC coverage (Geographic coverage) 2014 Download map png Download map
Southern Africa Malawi MDA/PC coverage (Therapeutic coverage) 2014 Download map png Download map
Southern Africa Lesotho MDA/PC rounds (Geographic coverage) 2013 - 2016 Download map png Download map
Southern Africa South Africa MDA/PC rounds (Therapeutic coverage) 2013 - 2016 Download map png Download map
Southern Africa Botswana MDA/PC coverage (Therapeutic coverage) 2014 Download map png Download map
Southern Africa Mozambique Mapping Surveys (Nodule Palpation) 2001 - 2007 Download map png Download map
Southern Africa Mozambique MDA/PC rounds (Therapeutic coverage) 2013 - 2016 Download map png Download map
Southern Africa eSwatini Endemicity 2017 Download map png Download map
Southern Africa South Africa MDA/PC coverage (Geographic coverage) 2013 Download map png Download map
Southern Africa eSwatini MDA/PC coverage (Geographic coverage) 2013 Download map png Download map
Southern Africa South Africa MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Southern Africa Zambia MDA/PC coverage (Geographic coverage) 2016 Download map png Download map
Southern Africa Mozambique MDA/PC coverage (Therapeutic coverage) 2014 Download map png Download map
Southern Africa Malawi Endemicity 2017 Download map png Download map
Southern Africa Malawi Mapping Surveys (Nodule Palpation) 1998 Download map png Download map
Southern Africa Malawi Impact Assessment (Skin Biopsy) Download map png Download map
Southern Africa Lesotho MDA/PC coverage (Therapeutic coverage) 2013 Download map png Download map
Southern Africa Malawi MDA/PC coverage (Therapeutic coverage) 2013 Download map png Download map
Southern Africa eSwatini MDA/PC coverage (Therapeutic coverage) 2013 Download map png Download map
Southern Africa Namibia MDA/PC rounds (Geographic coverage) 2013 - 2016 Download map png Download map
Southern Africa Malawi MDA/PC coverage (Geographic coverage) 2013 Download map png Download map
Southern Africa Botswana MDA/PC coverage (Therapeutic coverage) 2016 Download map png Download map
Southern Africa eSwatini MDA/PC coverage (Therapeutic coverage) 2015 Download map png Download map
Southern Africa Lesotho MDA/PC coverage (Therapeutic coverage) 2016 Download map png Download map
Southern Africa Zimbabwe MDA/PC coverage (Therapeutic coverage) 2016 Download map png Download map
Southern Africa Malawi MDA/PC rounds (Geographic coverage) 2013 - 2016 Download map png Download map
Southern Africa Botswana MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Southern Africa Lesotho MDA/PC coverage (Geographic coverage) 2013 Download map png Download map
Southern Africa Namibia MDA/PC coverage (Geographic coverage) 2013 Download map png Download map
Southern Africa Zimbabwe MDA/PC coverage (Geographic coverage) 2014 Download map png Download map
Southern Africa Botswana MDA/PC coverage (Geographic coverage) 2016 Download map png Download map
Southern Africa Lesotho MDA/PC coverage (Geographic coverage) 2014 Download map png Download map
Southern Africa Namibia MDA/PC coverage (Geographic coverage) 2014 Download map png Download map
Southern Africa Mozambique MDA/PC coverage (Therapeutic coverage) 2016 Download map png Download map
Southern Africa Lesotho MDA/PC rounds (Therapeutic coverage) 2013 - 2016 Download map png Download map
Southern Africa Botswana MDA/PC rounds (Geographic coverage) 2013 - 2016 Download map png Download map
Southern Africa Botswana MDA/PC coverage (Geographic coverage) 2014 Download map png Download map
Southern Africa Mozambique MDA/PC coverage (Geographic coverage) 2013 Download map png Download map
Southern Africa eSwatini MDA/PC coverage (Therapeutic coverage) 2014 Download map png Download map
Southern Africa Namibia MDA/PC coverage (Therapeutic coverage) 2015 Download map png Download map
Southern Africa Zimbabwe MDA/PC coverage (Therapeutic coverage) 2014 Download map png Download map
Southern Africa eSwatini MDA/PC coverage (Geographic coverage) 2016 Download map png Download map
Southern Africa Namibia MDA/PC rounds (Therapeutic coverage) 2013 - 2016 Download map png Download map
Southern Africa Botswana MDA/PC coverage (Geographic coverage) 2013 Download map png Download map
Southern Africa Mozambique MDA/PC coverage (Geographic coverage) 2015 Download map png Download map
Southern Africa Zimbabwe MDA/PC coverage (Geographic coverage) 2013 Download map png Download map
Southern Africa South Africa MDA/PC coverage (Therapeutic coverage) 2013 Download map png Download map
Southern Africa Zambia MDA/PC coverage (Therapeutic coverage) 2013 Download map png Download map
Central Africa Angola MDA/PC coverage (Therapeutic coverage) 2014 Download map png Download map
Central Africa Sao Tome & Principe MDA/PC rounds (Therapeutic coverage) 2013 - 2016 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 Impact Assessment (Skin Biopsy) Download map png Download map
Central Africa Cameroon MDA/PC coverage (Geographic coverage) 2013 Download map png Download map
Central Africa Chad 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

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