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
Eastern Africa Kenya Mapping Surveys (Nodule Palpation) 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 Mapping Surveys (Nodule Palpation) 1998 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 Zambia MDA/PC rounds (Therapeutic) 2013 - 2016 Download map
Southern Africa Zambia MDA/PC coverage (Therapeutic) 2013 Download map
Southern Africa Zambia MDA/PC coverage (Therapeutic) 2014 Download map
Southern Africa Zambia MDA/PC coverage (Therapeutic) 2016 Download map
Southern Africa Zambia MDA/PC coverage (Therapeutic) 2015 Download map
Southern Africa Zambia MDA/PC rounds (Geographic) 2013 - 2016 Download map
Southern Africa Zambia MDA/PC coverage (Geographic) 2013 Download map
Southern Africa Zambia 2017 Download map
Southern Africa Zambia MDA/PC coverage (Geographic) 2016 Download map
Southern Africa Zambia MDA/PC coverage (Geographic) 2015 Download map
Southern Africa Zambia MDA/PC coverage (Geographic) 2014 Download map
Central Africa Angola MDA/PC rounds (Geographic) 2013 - 2016 Download map
Central Africa Angola MDA/PC coverage (Geographic) 2016 Download map
Central Africa Angola MDA/PC rounds (Therapeutic) 2013 - 2016 Download map
Central Africa Angola MDA/PC coverage (Therapeutic) 2013 Download map
Central Africa Angola MDA/PC coverage (Therapeutic) 2014 Download map
Central Africa Angola MDA/PC coverage (Therapeutic) 2016 Download map
Central Africa Angola MDA/PC coverage (Therapeutic) 2015 Download map
Central Africa Angola MDA/PC coverage (Geographic) 2013 Download map
Central Africa Angola MDA/PC coverage (Geographic) 2015 Download map
Central Africa Angola MDA/PC coverage (Geographic) 2014 Download map
Central Africa Republic of Congo Mapping Surveys (Nodule Palpation) 2003 Download map
Central Africa Republic of Congo Mapping Surveys (Skin Biopsy) 2014 - 2015 Download map
Central Africa Republic of Congo Impact Assessment (Skin Biopsy) Download map
Central Africa Gabon Mapping Surveys (Skin Biopsy) 2014 - 2015 Download map
Central Africa Gabon Mapping Surveys (Nodule Palpation) 1999 - 2014 Download map
Central Africa Gabon Mapping Surveys (Anti-Ov16 test) 2015 Download map
Central Africa Angola 2017 Download map
Eastern Africa Kenya MDA/PC rounds (Therapeutic) 2013 - 2016 Download map
Eastern Africa Kenya MDA/PC coverage (Therapeutic) 2013 Download map
Eastern Africa Kenya MDA/PC coverage (Therapeutic) 2014 Download map
Eastern Africa Kenya MDA/PC coverage (Therapeutic) 2015 Download map
Eastern Africa Kenya MDA/PC coverage (Therapeutic) 2016 Download map
Eastern Africa Kenya MDA/PC rounds (Geographic) 2013 - 2016 Download map
Eastern Africa Kenya MDA/PC coverage (Geographic) 2013 Download map
Eastern Africa Kenya MDA/PC coverage (Geographic) 2016 Download map
Eastern Africa Kenya 2017 Download map
Eastern Africa Kenya MDA/PC coverage (Geographic) 2015 Download map
Eastern Africa Kenya MDA/PC coverage (Geographic) 2014 Download map
Eastern Africa Uganda MDA/PC coverage (Therapeutic) 2013 Download map
Western Africa Ghana MDA/PC rounds (Therapeutic) 2013 - 2016 Download map
Eastern Africa Uganda MDA/PC coverage (Therapeutic) 2014 Download map
Eastern Africa Uganda MDA/PC coverage (Geographic) 2013 Download map
Western Africa Ghana MDA/PC rounds (Geographic) 2013 - 2016 Download map
Western Africa Ghana MDA/PC coverage (Therapeutic) 2016 Download map
Western Africa Ghana MDA/PC coverage (Therapeutic) 2015 Download map
Eastern Africa Uganda MDA/PC coverage (Therapeutic) 2015 Download map
Western Africa Ghana MDA/PC coverage (Geographic) 2016 Download map
Western Africa Ghana MDA/PC coverage (Geographic) 2015 Download map
Eastern Africa Uganda MDA/PC coverage (Therapeutic) 2016 Download map
Western Africa Ghana MDA/PC coverage (Therapeutic) 2014 Download map
Western Africa Ghana MDA/PC coverage (Therapeutic) 2013 Download map
Eastern Africa Uganda MDA/PC coverage (Geographic) 2015 Download map
Eastern Africa Uganda MDA/PC coverage (Geographic) 2016 Download map
Eastern Africa Uganda MDA/PC rounds (Therapeutic) 2013 - 2016 Download map
Eastern Africa Uganda MDA/PC coverage (Geographic) 2014 Download map
Western Africa Ghana MDA/PC coverage (Geographic) 2013 Download map
Eastern Africa Uganda MDA/PC rounds (Geographic) 2013 - 2016 Download map
Western Africa Ghana MDA/PC coverage (Geographic) 2014 Download map
Central Africa Cameroon MDA/PC rounds (Therapeutic) 2013 - 2016 Download map
Central Africa Cameroon MDA/PC coverage (Therapeutic) 2015 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 rounds (Geographic) 2013 - 2016 Download map
Central Africa Cameroon MDA/PC coverage (Geographic) 2013 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 South Africa MDA/PC rounds (Therapeutic) 2013 - 2016 Download map
Southern Africa South Africa MDA/PC coverage (Therapeutic) 2013 Download map
Southern Africa South Africa MDA/PC coverage (Therapeutic) 2014 Download map
Southern Africa South Africa MDA/PC coverage (Therapeutic) 2015 Download map
Southern Africa South Africa MDA/PC coverage (Therapeutic) 2016 Download map
Southern Africa South Africa MDA/PC rounds (Geographic) 2013 - 2016 Download map
Southern Africa South Africa MDA/PC coverage (Geographic) 2013 Download map
Southern Africa South Africa MDA/PC coverage (Geographic) 2016 Download map
Southern Africa South Africa 2017 Download map
Southern Africa South Africa MDA/PC coverage (Geographic) 2015 Download map
Southern Africa South Africa MDA/PC coverage (Geographic) 2014 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) 2015 Download map
Western Africa Cote d’Ivoire MDA/PC coverage (Therapeutic) 2013 Download map
Western Africa Cote d’Ivoire MDA/PC rounds (Geographic) 2013 - 2016 Download map
Western Africa Cote d’Ivoire MDA/PC coverage (Therapeutic) 2016 Download map
Western Africa Cote d’Ivoire MDA/PC coverage (Geographic) 2014 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) 2015 Download map
Western Africa Niger MDA/PC coverage (Therapeutic) 2013 Download map
Western Africa Niger MDA/PC coverage (Therapeutic) 2014 Download map

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