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.

DB name: 
Oncho
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Region Country Program stage Years Portrait PDFs Landscape PDFs Data
Eastern Africa Seychelles MDA/PC coverage (Therapeutic coverage) 2016 Download map png Download map pdf Download map png Download map pdf
Western Africa Sierra Leone MDA/PC coverage (Geographic coverage) 2016 Download map png Download map pdf Download map png Download map pdf
Southern Africa South Africa MDA/PC coverage (Geographic coverage) 2016 Download map png Download map pdf Download map png Download map pdf
Eastern Africa Kenya MDA/PC coverage (Therapeutic coverage) 2016 Download map png Download map pdf Download map png Download map pdf
Eastern Africa Eritrea Endemicity 2016 Download map png Download map pdf Download map png Download map pdf
Western Africa Algeria Endemicity 2016 Download map png Download map pdf Download map png Download map pdf
Western Africa Nigeria Endemicity 2016 Download map png Download map pdf Download map png Download map pdf
Central Africa Central African Republic Endemicity 2016 Download map png Download map pdf Download map png Download map pdf
Western Africa The Gambia Endemicity 2016 Download map png Download map pdf Download map png Download map pdf
Western Africa Mauritania Endemicity 2016 Download map png Download map pdf Download map png Download map pdf
Southern Africa Botswana MDA/PC coverage (Geographic coverage) 2016 Download map png Download map pdf Download map png Download map pdf
Central Africa Central African Republic MDA/PC coverage (Geographic coverage) 2016 Download map png Download map pdf Download map png Download map pdf
Western Africa Nigeria MDA/PC coverage (Therapeutic coverage) 2016 Download map png Download map pdf Download map png Download map pdf
Western Africa Niger MDA/PC coverage (Geographic coverage) 2016 Download map png Download map pdf Download map png Download map pdf
Central Africa Gabon MDA/PC coverage (Therapeutic coverage) 2016 Download map png Download map pdf Download map png Download map pdf
Western Africa Sierra Leone Endemicity 2016 Download map png Download map pdf Download map png Download map pdf
Eastern Africa Kenya MDA/PC coverage (Geographic coverage) 2016 Download map png Download map pdf Download map png Download map pdf
Western Africa Cote d'Ivoire MDA/PC coverage (Therapeutic coverage) 2016 Download map png Download map pdf Download map png Download map pdf
Western Africa The Gambia MDA/PC coverage (Therapeutic coverage) 2016 Download map png Download map pdf Download map png Download map pdf
Southern Africa Lesotho MDA/PC coverage (Geographic coverage) 2016 Download map png Download map pdf Download map png Download map pdf
Western Africa Mauritania MDA/PC coverage (Therapeutic coverage) 2016 Download map png Download map pdf Download map png Download map pdf
Eastern Africa Kenya Endemicity 2016 Download map png Download map pdf Download map png Download map pdf
Central Africa Equatorial Guinea MDA/PC coverage (Geographic coverage) 2016 Download map png Download map pdf Download map png Download map pdf
Central Africa Burundi MDA/PC coverage (Therapeutic coverage) 2016 Download map png Download map pdf Download map png Download map pdf
Western Africa Sierra Leone MDA/PC coverage (Therapeutic coverage) 2016 Download map png Download map pdf Download map png Download map pdf
Central Africa Sao Tome & Principe MDA/PC coverage (Geographic coverage) 2016 Download map png Download map pdf Download map png Download map pdf
Eastern Africa South Sudan MDA/PC coverage (Geographic coverage) 2016 Download map png Download map pdf Download map png Download map pdf
Southern Africa Lesotho MDA/PC coverage (Therapeutic coverage) 2016 Download map png Download map pdf Download map png Download map pdf
Southern Africa eSwatini Endemicity 2016 Download map png Download map pdf Download map png Download map pdf
Central Africa Angola Endemicity 2016 Download map png Download map pdf Download map png Download map pdf
Central Africa Republic of Congo Endemicity 2016 Download map png Download map pdf Download map png Download map pdf
Central Africa Chad Endemicity 2016 Download map png Download map pdf Download map png Download map pdf
Western Africa Togo Endemicity 2016 Download map png Download map pdf Download map png Download map pdf
Eastern Africa Mauritius Endemicity 2016 Download map png Download map pdf Download map png Download map pdf
Central Africa Angola MDA/PC coverage (Geographic coverage) 2016 Download map png Download map pdf Download map png Download map pdf
Central Africa Cameroon MDA/PC coverage (Geographic coverage) 2016 Download map png Download map pdf Download map png Download map pdf
Western Africa Algeria MDA/PC coverage (Therapeutic coverage) 2016 Download map png Download map pdf Download map png Download map pdf
Central Africa Republic of Congo MDA/PC coverage (Therapeutic coverage) 2016 Download map png Download map pdf Download map png Download map pdf
Western Africa Nigeria MDA/PC coverage (Geographic coverage) 2016 Download map png Download map pdf Download map png Download map pdf
Central Africa Cameroon MDA/PC coverage (Therapeutic coverage) 2016 Download map png Download map pdf Download map png Download map pdf
Western Africa Sierra Leone Endemicity 2015 Download map png Download map pdf Download map png Download map pdf
Southern Africa Lesotho Endemicity 2015 Download map png Download map pdf Download map png Download map pdf
Western Africa Guinea-Bissau Endemicity 2015 Download map png Download map pdf Download map png Download map pdf
Southern Africa South Africa Endemicity 2015 Download map png Download map pdf Download map png Download map pdf
Southern Africa Malawi MDA/PC coverage (Geographic coverage) 2015 Download map png Download map pdf Download map png Download map pdf
Southern Africa Zambia MDA/PC coverage (Geographic coverage) 2015 Download map png Download map pdf Download map png Download map pdf
Western Africa Mali MDA/PC coverage (Therapeutic coverage) 2015 Download map png Download map pdf Download map png Download map pdf
Eastern Africa Ethiopia MDA/PC coverage (Geographic coverage) 2015 Download map png Download map pdf Download map png Download map pdf
Western Africa Cote d'Ivoire MDA/PC coverage (Therapeutic coverage) 2015 Download map png Download map pdf Download map png Download map pdf
Western Africa The Gambia MDA/PC coverage (Therapeutic coverage) 2015 Download map png Download map pdf Download map png Download map pdf
Western Africa Liberia MDA/PC coverage (Geographic coverage) 2015 Download map png Download map pdf Download map png Download map pdf
Western Africa Mauritania MDA/PC coverage (Therapeutic coverage) 2015 Download map png Download map pdf Download map png Download map pdf
Western Africa Senegal MDA/PC coverage (Geographic coverage) 2015 Download map png Download map pdf Download map png Download map pdf
Eastern Africa Seychelles MDA/PC coverage (Geographic coverage) 2015 Download map png Download map pdf Download map png Download map pdf
Eastern Africa Kenya MDA/PC coverage (Therapeutic coverage) 2015 Download map png Download map pdf Download map png Download map pdf
Western Africa Cape Verde MDA/PC coverage (Geographic coverage) 2015 Download map png Download map pdf Download map png Download map pdf
Central Africa Burundi MDA/PC coverage (Therapeutic coverage) 2015 Download map png Download map pdf Download map png Download map pdf
Western Africa Sierra Leone MDA/PC coverage (Therapeutic coverage) 2015 Download map png Download map pdf Download map png Download map pdf
Central Africa Angola Endemicity 2015 Download map png Download map pdf Download map png Download map pdf
Central Africa Republic of Congo Endemicity 2015 Download map png Download map pdf Download map png Download map pdf
Eastern Africa Ethiopia Endemicity 2015 Download map png Download map pdf Download map png Download map pdf
Eastern Africa Mauritius Endemicity 2015 Download map png Download map pdf Download map png Download map pdf
Eastern Africa Comoros Endemicity 2015 Download map png Download map pdf Download map png Download map pdf
Eastern Africa Uganda Endemicity 2015 Download map png Download map pdf Download map png Download map pdf
Southern Africa Zimbabwe MDA/PC coverage (Geographic coverage) 2015 Download map png Download map pdf Download map png Download map pdf
Eastern Africa Mauritius MDA/PC coverage (Geographic coverage) 2015 Download map png Download map pdf Download map png Download map pdf
Eastern Africa Ethiopia MDA/PC coverage (Therapeutic coverage) 2015 Download map png Download map pdf Download map png Download map pdf
Eastern Africa Comoros MDA/PC coverage (Geographic coverage) 2015 Download map png Download map pdf Download map png Download map pdf
Western Africa Algeria MDA/PC coverage (Therapeutic coverage) 2015 Download map png Download map pdf Download map png Download map pdf
Central Africa Republic of Congo MDA/PC coverage (Therapeutic coverage) 2015 Download map png Download map pdf Download map png Download map pdf
Western Africa Liberia Endemicity 2015 Download map png Download map pdf Download map png Download map pdf
Central Africa Burundi Endemicity 2015 Download map png Download map pdf Download map png Download map pdf
Eastern Africa South Sudan Endemicity 2015 Download map png Download map pdf Download map png Download map pdf
Western Africa Algeria MDA/PC coverage (Geographic coverage) 2015 Download map png Download map pdf Download map png Download map pdf
Western Africa Ghana MDA/PC coverage (Geographic coverage) 2015 Download map png Download map pdf Download map png Download map pdf
Central Africa Democratic Republic of the Congo MDA/PC coverage (Therapeutic coverage) 2015 Download map png Download map pdf Download map png Download map pdf
Western Africa Togo MDA/PC coverage (Therapeutic coverage) 2015 Download map png Download map pdf Download map png Download map pdf
Eastern Africa Kenya MDA/PC coverage (Geographic coverage) 2015 Download map png Download map pdf Download map png Download map pdf
Eastern Africa Mauritius MDA/PC coverage (Therapeutic coverage) 2015 Download map png Download map pdf Download map png Download map pdf
Eastern Africa Rwanda MDA/PC coverage (Geographic coverage) 2015 Download map png Download map pdf Download map png Download map pdf
Southern Africa South Africa MDA/PC coverage (Geographic coverage) 2015 Download map png Download map pdf Download map png Download map pdf
Southern Africa Lesotho MDA/PC coverage (Therapeutic coverage) 2015 Download map png Download map pdf Download map png Download map pdf
Central Africa Chad MDA/PC coverage (Geographic coverage) 2015 Download map png Download map pdf Download map png Download map pdf
Western Africa Cape Verde MDA/PC coverage (Therapeutic coverage) 2015 Download map png Download map pdf Download map png Download map pdf
Southern Africa South Africa MDA/PC coverage (Therapeutic coverage) 2015 Download map png Download map pdf Download map png Download map pdf
Western Africa Benin Endemicity 2015 Download map png Download map pdf Download map png Download map pdf
Eastern Africa Rwanda Endemicity 2015 Download map png Download map pdf Download map png Download map pdf
Central Africa Gabon Endemicity 2015 Download map png Download map pdf Download map png Download map pdf
Central Africa Central African Republic MDA/PC coverage (Geographic coverage) 2015 Download map png Download map pdf Download map png Download map pdf
Central Africa Angola MDA/PC coverage (Therapeutic coverage) 2015 Download map png Download map pdf Download map png Download map pdf
Eastern Africa Rwanda MDA/PC coverage (Therapeutic coverage) 2015 Download map png Download map pdf Download map png Download map pdf
Southern Africa Mozambique Endemicity 2015 Download map png Download map pdf Download map png Download map pdf
Western Africa Cote d'Ivoire Endemicity 2015 Download map png Download map pdf Download map png Download map pdf
Southern Africa Zambia Endemicity 2015 Download map png Download map pdf Download map png Download map pdf
Eastern Africa Uganda MDA/PC coverage (Geographic coverage) 2015 Download map png Download map pdf Download map png Download map pdf
Southern Africa Namibia MDA/PC coverage (Geographic coverage) 2015 Download map png Download map pdf Download map png Download map pdf
Central Africa Gabon MDA/PC coverage (Therapeutic coverage) 2015 Download map png Download map pdf Download map png Download map pdf
Eastern Africa Madagascar Endemicity 2015 Download map png Download map pdf Download map png Download map pdf
Central Africa Cameroon Endemicity 2015 Download map png Download map pdf Download map png Download map pdf
Eastern Africa Tanzania (Mainland) Endemicity 2015 Download map png Download map pdf Download map png Download map pdf

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