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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600 maps found
Region Location Program stage Years Maps Data
Central Africa Central African Republic Impact Assessment (Skin Biopsy) Download map
Western Africa Cote d’Ivoire MDA/PC rounds (Therapeutic) 2013 - 2016 Download map
Western Africa Cote d’Ivoire MDA/PC coverage (Therapeutic) 2014 Download map
Western Africa Cote d’Ivoire MDA/PC coverage (Therapeutic) 2013 Download map
Western Africa Cote d’Ivoire MDA/PC coverage (Therapeutic) 2015 Download map
Western Africa Cote d’Ivoire MDA/PC coverage (Therapeutic) 2016 Download map
Western Africa Cote d’Ivoire MDA/PC rounds (Geographic) 2013 - 2016 Download map
Western Africa Cote d’Ivoire MDA/PC coverage (Geographic) 2013 Download map
Western Africa Cote d’Ivoire MDA/PC coverage (Geographic) 2016 Download map
Western Africa Cote d’Ivoire MDA/PC coverage (Geographic) 2014 Download map
Western Africa Cote d’Ivoire MDA/PC coverage (Geographic) 2015 Download map
Western Africa Cote d’Ivoire 2017 Download map
Western Africa Niger MDA/PC rounds (Therapeutic) 2013 - 2016 Download map
Western Africa Niger MDA/PC coverage (Therapeutic) 2015 Download map
Western Africa Niger MDA/PC coverage (Therapeutic) 2016 Download map
Western Africa Niger MDA/PC rounds (Geographic) 2013 - 2016 Download map
Western Africa Niger MDA/PC coverage (Therapeutic) 2013 Download map
Western Africa Niger MDA/PC coverage (Geographic) 2016 Download map
Western Africa Niger MDA/PC coverage (Geographic) 2015 Download map
Western Africa Niger MDA/PC coverage (Therapeutic) 2014 Download map
Western Africa Niger MDA/PC coverage (Geographic) 2013 Download map
Western Africa Niger MDA/PC coverage (Geographic) 2014 Download map
Western Africa Niger 2017 Download map
Central Africa Cameroon MDA/PC coverage (Therapeutic) 2015 Download map
Central Africa Cameroon MDA/PC rounds (Therapeutic) 2013 - 2016 Download map
Central Africa Cameroon MDA/PC coverage (Therapeutic) 2014 Download map
Central Africa Cameroon MDA/PC coverage (Therapeutic) 2016 Download map
Central Africa Cameroon MDA/PC coverage (Therapeutic) 2013 Download map
Central Africa Cameroon MDA/PC coverage (Geographic) 2013 Download map
Central Africa Cameroon MDA/PC rounds (Geographic) 2013 - 2016 Download map
Central Africa Cameroon MDA/PC coverage (Geographic) 2015 Download map
Central Africa Cameroon MDA/PC coverage (Geographic) 2014 Download map
Central Africa Cameroon MDA/PC coverage (Geographic) 2016 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 (Therapeutic) 2014 Download map
Southern Africa Malawi MDA/PC coverage (Therapeutic) 2013 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 (Geographic) 2014 Download map
Southern Africa Malawi MDA/PC coverage (Geographic) 2013 Download map
Southern Africa Malawi MDA/PC rounds (Geographic) 2013 - 2016 Download map
Eastern Africa Kenya Mapping Surveys (Nodule Palpation) 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) 2015 Download map
Southern Africa Zimbabwe MDA/PC coverage (Therapeutic) 2016 Download map
Southern Africa Zimbabwe MDA/PC coverage (Therapeutic) 2014 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 2017 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
Central Africa Cameroon 2017 Download map
Western Africa Cote d’Ivoire Mapping Surveys (Nodule Palpation) 2014 Download map
Western Africa Cote d’Ivoire Mapping Surveys (Skin Biopsy) 2014 Download map
Southern Africa Malawi 2017 Download map
Southern Africa Malawi Mapping Surveys (Nodule Palpation) 1998 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) 2016 Download map
Eastern Africa Madagascar MDA/PC coverage (Therapeutic) 2014 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 Cameroon Mapping Surveys (Nodule Palpation) 1993 - 2013 Download map
Southern Africa Malawi Impact Assessment (Skin Biopsy) Download map
Central Africa Cameroon Impact Assessment (Skin Biopsy) Download map
Central Africa Cameroon Mapping Surveys (Skin Biopsy) 2013 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
Western Africa Guinea MDA/PC rounds (Geographic) 2013 - 2016 Download map
Western Africa Guinea MDA/PC coverage (Therapeutic) 2013 Download map
Western Africa Guinea MDA/PC coverage (Therapeutic) 2014 Download map
Western Africa Guinea MDA/PC coverage (Geographic) 2014 Download map
Western Africa Guinea MDA/PC coverage (Geographic) 2013 Download map
Western Africa Guinea MDA/PC coverage (Geographic) 2015 Download map
Western Africa Guinea MDA/PC rounds (Therapeutic) 2013 - 2016 Download map
Western Africa Guinea MDA/PC coverage (Therapeutic) 2016 Download map
Western Africa Guinea MDA/PC coverage (Therapeutic) 2015 Download map
Western Africa Guinea MDA/PC coverage (Geographic) 2016 Download map
Western Africa Guinea 2017 Download map
Western Africa Benin MDA/PC rounds (Therapeutic) 2013 - 2016 Download map
Western Africa Benin MDA/PC coverage (Therapeutic) 2013 Download map
Western Africa Benin MDA/PC coverage (Therapeutic) 2016 Download map

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