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.

24 maps found
There are currently no regional maps for this Program stage
527 maps found
Region Country Program stage Years Maps Data
Western Africa Niger MDA/PC rounds (Therapeutic) 2013 - 2016 Download map
Western Africa Niger MDA/PC coverage (Geographic) 2013 Download map
Western Africa Niger MDA/PC coverage (Therapeutic) 2015 Download map
Western Africa Niger MDA/PC rounds (Geographic) 2013 - 2016 Download map
Western Africa Niger MDA/PC coverage (Therapeutic) 2016 Download map
Western Africa Niger MDA/PC coverage (Geographic) 2014 Download map
Western Africa Niger MDA/PC coverage (Geographic) 2015 Download map
Western Africa Niger MDA/PC coverage (Geographic) 2016 Download map
Western Africa Niger 2017 Download map
Eastern Africa South Sudan MDA/PC rounds (Therapeutic) 2013 - 2016 Download map
Eastern Africa South Sudan MDA/PC coverage (Therapeutic) 2013 Download map
Eastern Africa South Sudan MDA/PC coverage (Therapeutic) 2014 Download map
Eastern Africa South Sudan MDA/PC coverage (Therapeutic) 2016 Download map
Eastern Africa South Sudan MDA/PC coverage (Therapeutic) 2015 Download map
Eastern Africa South Sudan MDA/PC rounds (Geographic) 2013 - 2016 Download map
Eastern Africa South Sudan MDA/PC coverage (Geographic) 2013 Download map
Eastern Africa South Sudan 2017 Download map
Eastern Africa South Sudan MDA/PC coverage (Geographic) 2016 Download map
Eastern Africa South Sudan MDA/PC coverage (Geographic) 2015 Download map
Eastern Africa South Sudan MDA/PC coverage (Geographic) 2014 Download map
Western Africa Cote d’Ivoire 2017 Download map
Eastern Africa Rwanda Mapping Surveys (Nodule Palpation) Download map
Central Africa Central African Republic MDA/PC coverage (Therapeutic) 2013 Download map
Central Africa Central African Republic MDA/PC coverage (Therapeutic) 2014 Download map
Central Africa Central African Republic MDA/PC rounds (Therapeutic) 2013 - 2016 Download map
Central Africa Central African Republic MDA/PC coverage (Therapeutic) 2015 Download map
Central Africa Central African Republic MDA/PC coverage (Therapeutic) 2016 Download map
Central Africa Central African Republic MDA/PC rounds (Geographic) 2013 - 2016 Download map
Central Africa Central African Republic MDA/PC coverage (Geographic) 2014 Download map
Central Africa Central African Republic MDA/PC coverage (Geographic) 2013 Download map
Central Africa Central African Republic MDA/PC coverage (Geographic) 2015 Download map
Central Africa Central African Republic 2017 Download map
Central Africa Central African Republic MDA/PC coverage (Geographic) 2016 Download map
Central Africa Burundi Mapping Surveys (Nodule Palpation) 2001 - 2013 Download map
Central Africa Cameroon 2017 Download map
Central Africa Burundi Impact Assessment (Skin Biopsy) Download map
Central Africa Burundi Mapping Surveys (Skin Biopsy) 2013 Download map
Western Africa Ghana 2017 Download map
Southern Africa Zimbabwe MDA/PC rounds (Therapeutic) 2013 - 2016 Download map
Southern Africa Zimbabwe MDA/PC coverage (Therapeutic) 2013 Download map
Southern Africa Zimbabwe MDA/PC coverage (Therapeutic) 2014 Download map
Southern Africa Zimbabwe MDA/PC coverage (Therapeutic) 2016 Download map
Southern Africa Zimbabwe MDA/PC coverage (Therapeutic) 2015 Download map
Southern Africa Zimbabwe MDA/PC rounds (Geographic) 2013 - 2016 Download map
Southern Africa Zimbabwe MDA/PC coverage (Geographic) 2013 Download map
Southern Africa Zimbabwe MDA/PC coverage (Geographic) 2016 Download map
Southern Africa Zimbabwe MDA/PC coverage (Geographic) 2015 Download map
Southern Africa Zimbabwe MDA/PC coverage (Geographic) 2014 Download map
Western Africa Liberia Mapping Surveys (Nodule Palpation) 1998 Download map
Central Africa Equatorial Guinea Mapping Surveys (Nodule Palpation) 1999 - 2013 Download map
Western Africa Liberia Impact Assessment (Skin Biopsy) Download map
Eastern Africa Madagascar MDA/PC rounds (Therapeutic) 2013 - 2016 Download map
Eastern Africa Madagascar MDA/PC coverage (Therapeutic) 2013 Download map
Eastern Africa Madagascar MDA/PC coverage (Therapeutic) 2014 Download map
Eastern Africa Madagascar MDA/PC coverage (Therapeutic) 2016 Download map
Eastern Africa Madagascar MDA/PC coverage (Therapeutic) 2015 Download map
Eastern Africa Madagascar MDA/PC rounds (Geographic) 2013 - 2016 Download map
Eastern Africa Madagascar MDA/PC coverage (Geographic) 2013 Download map
Eastern Africa Madagascar MDA/PC coverage (Geographic) 2016 Download map
Eastern Africa Madagascar 2017 Download map
Eastern Africa Madagascar MDA/PC coverage (Geographic) 2015 Download map
Eastern Africa Madagascar MDA/PC coverage (Geographic) 2014 Download map
Central Africa Equatorial Guinea Mapping Surveys (Skin Biopsy) 2013 - 2015 Download map
Central Africa Equatorial Guinea Impact Assessment (Skin Biopsy) Download map
Southern Africa Namibia MDA/PC rounds (Therapeutic) 2013 - 2016 Download map
Southern Africa Namibia MDA/PC coverage (Therapeutic) 2013 Download map
Southern Africa Namibia 2017 Download map
Southern Africa Namibia MDA/PC coverage (Therapeutic) 2014 Download map
Southern Africa Namibia MDA/PC coverage (Therapeutic) 2016 Download map
Southern Africa Namibia MDA/PC coverage (Therapeutic) 2015 Download map
Southern Africa Namibia MDA/PC rounds (Geographic) 2013 - 2016 Download map
Southern Africa Namibia MDA/PC coverage (Geographic) 2013 Download map
Southern Africa Namibia MDA/PC coverage (Geographic) 2016 Download map
Southern Africa Namibia MDA/PC coverage (Geographic) 2015 Download map
Southern Africa Namibia MDA/PC coverage (Geographic) 2014 Download map
Southern Africa Malawi MDA/PC coverage (Therapeutic) 2014 Download map
Southern Africa Malawi MDA/PC coverage (Therapeutic) 2016 Download map
Southern Africa Malawi MDA/PC coverage (Therapeutic) 2015 Download map
Southern Africa Malawi MDA/PC coverage (Geographic) 2014 Download map
Southern Africa Malawi MDA/PC coverage (Geographic) 2016 Download map
Southern Africa Malawi MDA/PC coverage (Geographic) 2015 Download map
Southern Africa Malawi MDA/PC rounds (Therapeutic) 2013 - 2016 Download map
Southern Africa Malawi MDA/PC coverage (Therapeutic) 2013 Download map
Southern Africa Malawi MDA/PC rounds (Geographic) 2013 - 2016 Download map
Southern Africa Malawi MDA/PC coverage (Geographic) 2013 Download map
Central Africa Republic of Congo MDA/PC rounds (Therapeutic) 2013 - 2016 Download map
Central Africa Republic of Congo MDA/PC coverage (Therapeutic) 2013 Download map
Central Africa Republic of Congo MDA/PC coverage (Therapeutic) 2014 Download map
Central Africa Republic of Congo 2017 Download map
Central Africa Republic of Congo MDA/PC coverage (Therapeutic) 2016 Download map
Central Africa Republic of Congo MDA/PC coverage (Therapeutic) 2015 Download map
Central Africa Republic of Congo MDA/PC rounds (Geographic) 2013 - 2016 Download map
Central Africa Republic of Congo MDA/PC coverage (Geographic) 2016 Download map
Central Africa Republic of Congo MDA/PC coverage (Geographic) 2015 Download map
Central Africa Republic of Congo MDA/PC coverage (Geographic) 2014 Download map
Central Africa Republic of Congo MDA/PC coverage (Geographic) 2013 Download map
Southern Africa Malawi 2017 Download map
Southern Africa Botswana MDA/PC rounds (Therapeutic) 2013 - 2016 Download map
Southern Africa Botswana MDA/PC rounds (Geographic) 2013 - 2016 Download map
Southern Africa Botswana MDA/PC coverage (Therapeutic) 2013 Download map

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