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
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574 maps found
Regionsort descending Location Program stage Years Maps Data
Eastern Africa Kenya MDA/PC rounds (Geographic) 2013 - 2016 Download map png Download map
Eastern Africa Madagascar Endemicity 2017 Download map png Download map
Eastern Africa South Sudan MDA/PC coverage (Therapeutic) 2014 Download map png Download map
Eastern Africa Tanzania (Zanzibar) MDA/PC coverage (Geographic) 2013 Download map png Download map
Eastern Africa South Sudan MDA/PC coverage (Geographic) 2015 Download map png Download map
Eastern Africa Uganda MDA/PC coverage (Therapeutic) 2013 Download map png Download map
Eastern Africa Uganda Impact Assessment (Skin Biopsy) Download map png Download map
Eastern Africa Ethiopia MDA/PC coverage (Geographic) 2016 Download map png Download map
Eastern Africa Seychelles MDA/PC coverage (Geographic) 2013 Download map png Download map
Eastern Africa Kenya Mapping Surveys (Nodule Palpation) Download map png Download map
Eastern Africa Comoros MDA/PC coverage (Therapeutic) 2016 Download map png Download map
Eastern Africa Ethiopia MDA/PC coverage (Geographic) 2014 Download map png Download map
Eastern Africa Seychelles Endemicity 2017 Download map png Download map
Eastern Africa Ethiopia MDA/PC coverage (Therapeutic) 2013 Download map png Download map
Eastern Africa Tanzania (Mainland) MDA/PC coverage (Geographic) 2016 Download map png Download map
Eastern Africa Seychelles MDA/PC rounds (Therapeutic) 2013 - 2016 Download map png Download map
Eastern Africa Tanzania (Mainland) MDA/PC coverage (Geographic) 2013 Download map png Download map
Eastern Africa Tanzania (Mainland) Mapping Surveys (Nodule Palpation) 1996 - 2012 Download map png Download map
Eastern Africa South Sudan MDA/PC coverage (Therapeutic) 2013 Download map png Download map
Eastern Africa Madagascar MDA/PC rounds (Geographic) 2013 - 2016 Download map png Download map
Eastern Africa Seychelles MDA/PC coverage (Geographic) 2016 Download map png Download map
Eastern Africa Madagascar MDA/PC coverage (Therapeutic) 2014 Download map png Download map
Eastern Africa Tanzania (Mainland) MDA/PC rounds (Geographic) 2013 - 2016 Download map png Download map
Eastern Africa Madagascar MDA/PC rounds (Therapeutic) 2013 - 2016 Download map png Download map
Eastern Africa Tanzania (Mainland) Endemicity 2017 Download map png Download map
Eastern Africa Madagascar MDA/PC coverage (Geographic) 2015 Download map png Download map
Eastern Africa Tanzania (Mainland) Mapping Surveys (Skin Biopsy) 2014 Download map png Download map
Eastern Africa Rwanda MDA/PC rounds (Geographic) 2013 - 2016 Download map png Download map
Eastern Africa Comoros MDA/PC coverage (Therapeutic) 2015 Download map png Download map
Eastern Africa Seychelles MDA/PC coverage (Therapeutic) 2016 Download map png Download map
Eastern Africa Rwanda MDA/PC coverage (Geographic) 2013 Download map png Download map
Eastern Africa Comoros MDA/PC coverage (Geographic) 2013 Download map png Download map
Eastern Africa Tanzania (Zanzibar) MDA/PC coverage (Therapeutic) 2016 Download map png Download map
Eastern Africa Ethiopia MDA/PC rounds (Geographic) 2013 - 2016 Download map png Download map
Eastern Africa Uganda MDA/PC coverage (Geographic) 2015 Download map png Download map
Eastern Africa Madagascar MDA/PC rounds (Geographic) 1990 - 2016 Download map png Download map
Eastern Africa Tanzania (Zanzibar) MDA/PC coverage (Geographic) 2016 Download map png Download map
Eastern Africa South Sudan MDA/PC rounds (Geographic) 2013 - 2016 Download map png Download map
Eastern Africa Ethiopia MDA/PC rounds (Therapeutic) 2013 - 2016 Download map png Download map
Eastern Africa Tanzania (Mainland) MDA/PC coverage (Therapeutic) 2015 Download map png Download map
Eastern Africa Tanzania (Mainland) MDA/PC coverage (Therapeutic) 2016 Download map png Download map
Eastern Africa South Sudan MDA/PC coverage (Geographic) 2014 Download map png Download map
Eastern Africa Uganda MDA/PC rounds (Geographic) 1990 - 2016 Download map png Download map
Eastern Africa Uganda Mapping Surveys (Nodule Palpation) 2008 Download map png Download map
Eastern Africa Comoros MDA/PC rounds (Geographic) 2013 - 2016 Download map png Download map
Eastern Africa Kenya MDA/PC coverage (Therapeutic) 2015 Download map png Download map
Eastern Africa Madagascar MDA/PC coverage (Geographic) 2014 Download map png Download map
Eastern Africa Kenya MDA/PC coverage (Geographic) 2013 Download map png Download map
Eastern Africa Rwanda MDA/PC coverage (Geographic) 2016 Download map png Download map
Eastern Africa Tanzania (Zanzibar) MDA/PC coverage (Therapeutic) 2015 Download map png Download map
Eastern Africa Seychelles MDA/PC coverage (Therapeutic) 2015 Download map png Download map
Eastern Africa Tanzania (Mainland) MDA/PC coverage (Therapeutic) 2014 Download map png Download map
Eastern Africa Tanzania (Zanzibar) MDA/PC rounds (Geographic) 1990 - 2016 Download map png Download map
Eastern Africa Kenya MDA/PC coverage (Therapeutic) 2016 Download map png Download map
Eastern Africa Kenya MDA/PC rounds (Geographic) 1990 - 2016 Download map png Download map
Eastern Africa Tanzania (Mainland) MDA/PC coverage (Geographic) 2015 Download map png Download map
Eastern Africa Ethiopia Impact Assessment (Skin Biopsy) Download map png Download map
Eastern Africa Seychelles MDA/PC rounds (Geographic) 2013 - 2016 Download map png Download map
Eastern Africa South Sudan MDA/PC rounds (Geographic) 1990 - 2016 Download map png Download map
Eastern Africa Madagascar MDA/PC coverage (Therapeutic) 2013 Download map png Download map
Eastern Africa Tanzania (Zanzibar) MDA/PC coverage (Therapeutic) 2014 Download map png Download map
Eastern Africa Madagascar MDA/PC coverage (Geographic) 2013 Download map png Download map
Eastern Africa Seychelles MDA/PC coverage (Geographic) 2015 Download map png Download map
Eastern Africa Comoros MDA/PC coverage (Therapeutic) 2014 Download map png Download map
Eastern Africa Seychelles MDA/PC coverage (Therapeutic) 2014 Download map png Download map
Eastern Africa Uganda MDA/PC rounds (Geographic) 2013 - 2016 Download map png Download map
Eastern Africa Uganda MDA/PC coverage (Therapeutic) 2016 Download map png Download map
Eastern Africa Comoros MDA/PC coverage (Geographic) 2015 Download map png Download map
Eastern Africa Tanzania (Mainland) MDA/PC coverage (Therapeutic) 2013 Download map png Download map
Eastern Africa Ethiopia MDA/PC coverage (Therapeutic) 2015 Download map png Download map
Eastern Africa Rwanda MDA/PC coverage (Therapeutic) 2015 Download map png Download map
Eastern Africa Ethiopia MDA/PC coverage (Geographic) 2013 Download map png Download map
Eastern Africa Kenya Endemicity 2017 Download map png Download map
Eastern Africa Uganda MDA/PC coverage (Geographic) 2014 Download map png Download map

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