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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574 maps found
Region Countrysort ascending Program stage Years Maps Data
Central Africa Burundi Endemicity 2017 Download map png Download map
Central Africa Burundi MDA/PC rounds (Therapeutic) 2013 - 2016 Download map png Download map
Central Africa Burundi Mapping Surveys (Nodule Palpation) 2001 - 2013 Download map png Download map
Central Africa Burundi MDA/PC coverage (Therapeutic) 2016 Download map png Download map
Central Africa Burundi MDA/PC rounds (Geographic) 1990 - 2016 Download map png Download map
Central Africa Burundi MDA/PC coverage (Therapeutic) 2014 Download map png Download map
Central Africa Burundi Impact Assessment (Skin Biopsy) Download map png Download map
Central Africa Burundi MDA/PC coverage (Geographic) 2016 Download map png Download map
Central Africa Burundi MDA/PC coverage (Geographic) 2014 Download map png Download map
Central Africa Burundi MDA/PC coverage (Geographic) 2015 Download map png Download map
Central Africa Burundi MDA/PC coverage (Therapeutic) 2013 Download map png Download map
Central Africa Burundi MDA/PC coverage (Geographic) 2013 Download map png Download map
Western Africa Burkina Faso MDA/PC rounds (Geographic) 1990 - 2016 Download map png Download map
Western Africa Burkina Faso MDA/PC coverage (Therapeutic) 2015 Download map png Download map
Western Africa Burkina Faso MDA/PC rounds (Therapeutic) 2013 - 2016 Download map png Download map
Western Africa Burkina Faso MDA/PC coverage (Geographic) 2013 Download map png Download map
Western Africa Burkina Faso MDA/PC rounds (Geographic) 2013 - 2016 Download map png Download map
Western Africa Burkina Faso MDA/PC coverage (Geographic) 2014 Download map png Download map
Western Africa Burkina Faso MDA/PC coverage (Therapeutic) 2014 Download map png Download map
Western Africa Burkina Faso MDA/PC coverage (Geographic) 2016 Download map png Download map
Western Africa Burkina Faso MDA/PC coverage (Therapeutic) 2016 Download map png Download map
Western Africa Burkina Faso Endemicity 2017 Download map png Download map
Western Africa Burkina Faso MDA/PC coverage (Geographic) 2015 Download map png Download map
Western Africa Burkina Faso MDA/PC coverage (Therapeutic) 2013 Download map png Download map
Southern Africa Botswana MDA/PC coverage (Therapeutic) 2013 Download map png Download map
Southern Africa Botswana MDA/PC coverage (Therapeutic) 2014 Download map png Download map
Southern Africa Botswana MDA/PC coverage (Geographic) 2014 Download map png Download map
Southern Africa Botswana MDA/PC coverage (Geographic) 2015 Download map png Download map
Southern Africa Botswana MDA/PC rounds (Geographic) 1990 - 2016 Download map png Download map
Southern Africa Botswana MDA/PC rounds (Geographic) 2013 - 2016 Download map png Download map
Southern Africa Botswana Endemicity 2017 Download map png Download map
Southern Africa Botswana MDA/PC coverage (Geographic) 2016 Download map png Download map
Southern Africa Botswana MDA/PC coverage (Therapeutic) 2016 Download map png Download map
Southern Africa Botswana MDA/PC coverage (Therapeutic) 2015 Download map png Download map
Southern Africa Botswana MDA/PC coverage (Geographic) 2013 Download map png Download map
Southern Africa Botswana MDA/PC rounds (Therapeutic) 2013 - 2016 Download map png Download map
Western Africa Benin MDA/PC coverage (Geographic) 2014 Download map png Download map
Western Africa Benin MDA/PC rounds (Therapeutic) 2013 - 2016 Download map png Download map
Western Africa Benin MDA/PC rounds (Geographic) 1990 - 2016 Download map png Download map
Western Africa Benin MDA/PC coverage (Therapeutic) 2014 Download map png Download map
Western Africa Benin MDA/PC coverage (Therapeutic) 2013 Download map png Download map
Western Africa Benin MDA/PC coverage (Geographic) 2016 Download map png Download map
Western Africa Benin MDA/PC coverage (Geographic) 2015 Download map png Download map
Western Africa Benin MDA/PC rounds (Geographic) 2013 - 2016 Download map png Download map
Western Africa Benin MDA/PC coverage (Geographic) 2013 Download map png Download map
Western Africa Benin MDA/PC coverage (Therapeutic) 2015 Download map png Download map
Western Africa Benin MDA/PC coverage (Therapeutic) 2016 Download map png Download map
Western Africa Benin Endemicity 2017 Download map png Download map
Central Africa Angola Mapping Surveys (Nodule Palpation) 2002 - 2011 Download map png Download map
Central Africa Angola MDA/PC rounds (Geographic) 1990 - 2016 Download map png Download map
Central Africa Angola MDA/PC coverage (Therapeutic) 2013 Download map png Download map
Central Africa Angola MDA/PC coverage (Therapeutic) 2014 Download map png Download map
Central Africa Angola MDA/PC coverage (Geographic) 2014 Download map png Download map
Central Africa Angola MDA/PC coverage (Geographic) 2013 Download map png Download map
Central Africa Angola MDA/PC coverage (Geographic) 2016 Download map png Download map
Central Africa Angola MDA/PC rounds (Therapeutic) 2013 - 2016 Download map png Download map
Central Africa Angola MDA/PC coverage (Therapeutic) 2016 Download map png Download map
Central Africa Angola MDA/PC rounds (Geographic) 2013 - 2016 Download map png Download map
Central Africa Angola MDA/PC coverage (Geographic) 2015 Download map png Download map
Central Africa Angola Mapping Surveys (Skin Biopsy) 2015 Download map png Download map
Central Africa Angola MDA/PC coverage (Therapeutic) 2015 Download map png Download map
Central Africa Angola Endemicity 2017 Download map png Download map
Western Africa Algeria MDA/PC rounds (Geographic) 2013 - 2016 Download map png Download map
Western Africa Algeria MDA/PC coverage (Geographic) 2013 Download map png Download map
Western Africa Algeria MDA/PC coverage (Therapeutic) 2013 Download map png Download map
Western Africa Algeria MDA/PC coverage (Geographic) 2016 Download map png Download map
Western Africa Algeria MDA/PC coverage (Therapeutic) 2014 Download map png Download map
Western Africa Algeria MDA/PC coverage (Geographic) 2015 Download map png Download map
Western Africa Algeria Endemicity 2017 Download map png Download map
Western Africa Algeria MDA/PC coverage (Therapeutic) 2016 Download map png Download map
Western Africa Algeria MDA/PC rounds (Therapeutic) 2013 - 2016 Download map png Download map
Western Africa Algeria MDA/PC coverage (Therapeutic) 2015 Download map png Download map
Western Africa Algeria MDA/PC rounds (Geographic) 1990 - 2016 Download map png Download map
Western Africa Algeria MDA/PC coverage (Geographic) 2014 Download map png Download map

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