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
Western Africa Benin MDA/PC coverage (Therapeutic) 2014 Download map
Western Africa Benin MDA/PC coverage (Therapeutic) 2015 Download map
Western Africa Benin MDA/PC rounds (Geographic) 2013 - 2016 Download map
Western Africa Benin MDA/PC coverage (Geographic) 2013 Download map
Western Africa Benin MDA/PC coverage (Geographic) 2015 Download map
Western Africa Benin MDA/PC coverage (Geographic) 2014 Download map
Western Africa Benin MDA/PC coverage (Geographic) 2016 Download map
Southern Africa Botswana MDA/PC rounds (Therapeutic) 2013 - 2016 Download map
Southern Africa Botswana MDA/PC coverage (Therapeutic) 2013 Download map
Southern Africa Botswana MDA/PC rounds (Geographic) 2013 - 2016 Download map
Southern Africa Botswana MDA/PC coverage (Therapeutic) 2016 Download map
Southern Africa Botswana MDA/PC coverage (Therapeutic) 2014 Download map
Southern Africa Botswana MDA/PC coverage (Therapeutic) 2015 Download map
Southern Africa Botswana MDA/PC coverage (Geographic) 2013 Download map
Southern Africa Botswana MDA/PC coverage (Geographic) 2016 Download map
Southern Africa Botswana 2017 Download map
Southern Africa Botswana MDA/PC coverage (Geographic) 2015 Download map
Southern Africa Botswana MDA/PC coverage (Geographic) 2014 Download map
Western Africa Benin 2017 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 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 2017 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
Central Africa Gabon MDA/PC rounds (Therapeutic) 2013 - 2016 Download map
Central Africa Gabon MDA/PC coverage (Therapeutic) 2013 Download map
Central Africa Gabon MDA/PC coverage (Therapeutic) 2014 Download map
Central Africa Gabon MDA/PC coverage (Therapeutic) 2015 Download map
Central Africa Gabon MDA/PC coverage (Therapeutic) 2016 Download map
Central Africa Gabon MDA/PC rounds (Geographic) 2013 - 2016 Download map
Central Africa Gabon MDA/PC coverage (Geographic) 2013 Download map
Central Africa Gabon MDA/PC coverage (Geographic) 2016 Download map
Central Africa Gabon MDA/PC coverage (Geographic) 2015 Download map
Central Africa Gabon MDA/PC coverage (Geographic) 2014 Download map
Central Africa Gabon 2017 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
Western Africa Togo MDA/PC coverage (Therapeutic) 2013 Download map
Western Africa Togo MDA/PC rounds (Therapeutic) 2013 - 2016 Download map
Western Africa Togo MDA/PC rounds (Geographic) 2013 - 2016 Download map
Western Africa Togo MDA/PC coverage (Therapeutic) 2016 Download map
Western Africa Togo MDA/PC coverage (Geographic) 2013 Download map
Western Africa Togo MDA/PC coverage (Geographic) 2016 Download map
Western Africa Togo 2017 Download map
Western Africa Togo MDA/PC coverage (Geographic) 2015 Download map
Western Africa Togo MDA/PC coverage (Geographic) 2014 Download map
Western Africa Togo MDA/PC coverage (Therapeutic) 2014 Download map
Western Africa Togo MDA/PC coverage (Therapeutic) 2015 Download map
Western Africa Mauritania MDA/PC rounds (Therapeutic) 2013 - 2016 Download map
Western Africa Mauritania MDA/PC coverage (Therapeutic) 2013 Download map
Western Africa Mauritania MDA/PC coverage (Therapeutic) 2016 Download map
Western Africa Mauritania MDA/PC coverage (Therapeutic) 2015 Download map
Western Africa Mauritania MDA/PC coverage (Therapeutic) 2014 Download map
Western Africa Mauritania MDA/PC rounds (Geographic) 2013 - 2016 Download map
Western Africa Mauritania MDA/PC coverage (Geographic) 2013 Download map
Western Africa Mauritania MDA/PC coverage (Geographic) 2016 Download map
Western Africa Mauritania 2017 Download map
Western Africa Mauritania MDA/PC coverage (Geographic) 2015 Download map
Western Africa Mauritania MDA/PC coverage (Geographic) 2014 Download map
Western Africa Algeria MDA/PC rounds (Therapeutic) 2013 - 2016 Download map
Western Africa Algeria MDA/PC coverage (Therapeutic) 2013 Download map
Western Africa Algeria MDA/PC coverage (Therapeutic) 2016 Download map
Western Africa Algeria MDA/PC coverage (Therapeutic) 2015 Download map
Western Africa Algeria MDA/PC coverage (Therapeutic) 2014 Download map
Western Africa Algeria MDA/PC rounds (Geographic) 2013 - 2016 Download map
Western Africa Algeria MDA/PC coverage (Geographic) 2013 Download map
Western Africa Algeria 2017 Download map
Western Africa Algeria MDA/PC coverage (Geographic) 2016 Download map
Western Africa Algeria MDA/PC coverage (Geographic) 2015 Download map
Western Africa Algeria MDA/PC coverage (Geographic) 2014 Download map
Western Africa Senegal MDA/PC rounds (Therapeutic) 2013 - 2016 Download map
Western Africa Senegal MDA/PC coverage (Therapeutic) 2016 Download map
Western Africa Senegal MDA/PC coverage (Therapeutic) 2013 Download map
Western Africa Senegal MDA/PC coverage (Therapeutic) 2014 Download map
Western Africa Senegal MDA/PC rounds (Geographic) 2013 - 2016 Download map
Western Africa Senegal MDA/PC coverage (Therapeutic) 2015 Download map
Western Africa Senegal MDA/PC coverage (Geographic) 2013 Download map
Western Africa Senegal MDA/PC coverage (Geographic) 2016 Download map
Western Africa Senegal MDA/PC coverage (Geographic) 2015 Download map
Western Africa Senegal MDA/PC coverage (Geographic) 2014 Download map
Eastern Africa Rwanda MDA/PC rounds (Therapeutic) 2013 - 2016 Download map
Eastern Africa Rwanda MDA/PC coverage (Therapeutic) 2013 Download map
Eastern Africa Rwanda MDA/PC coverage (Therapeutic) 2015 Download map
Eastern Africa Rwanda MDA/PC coverage (Therapeutic) 2016 Download map
Eastern Africa Rwanda MDA/PC coverage (Therapeutic) 2014 Download map
Eastern Africa Rwanda MDA/PC rounds (Geographic) 2013 - 2016 Download map
Eastern Africa Rwanda MDA/PC coverage (Geographic) 2013 Download map
Eastern Africa Rwanda MDA/PC coverage (Geographic) 2016 Download map
Eastern Africa Rwanda MDA/PC coverage (Geographic) 2015 Download map
Eastern Africa Rwanda 2017 Download map

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