Loiasis

Loiasis, or African eye worm, is caused by infection with the filarial parasite Loa loa. The parasite is transmitted by deerflies in the Chrysops genus, which breed in tropical rainforests in West and Central Africa. Although repeated infection can cause painful, itchy swellings, the disease only emerged as a major public health concern when it was reported that individuals with high intensity Loa loa infection can develop severe adverse effects (SAEs) to treatment with the antifilarial drug ivermectin. This is an important concern given that preventive chemotherapy with ivermectin is used to reduce the transmission of LF and onchocerciasis.

To identify co-endemic areas for onchocerciasis or LF and loiasis, where individuals may be at risk of SAEs if standard MDA regimens were followed, a rapid assessment procedure for loiasis (RAPLOA) was implemented throughout potentially suitable countries.

Browse the maps to see the results of this assessment by country or for the entire region.

18 maps found
Region Program stage Years Maps Data
Eastern Africa Endemicity 2017 Download map png Download map
Western Africa Endemicity 2017 Download map png Download map
Southern Africa Endemicity 2017 Download map png Download map
WHO African Region (AFRO) Endemicity 2017 Download map png Download map
Central Africa Endemicity 2017 Download map png Download map
Africa Continent Endemicity 2017 Download map png Download map
Africa Continent Mapping Surveys (Blood smear) 2015 Download map png Download map
Eastern Africa Mapping Surveys (Blood smear) 2015 Download map png Download map
Western Africa Mapping Surveys (Blood smear) 2015 Download map png Download map
Southern Africa Mapping Surveys (Blood smear) 2015 Download map png Download map
WHO African Region (AFRO) Mapping Surveys (Blood smear) 2015 Download map png Download map
Central Africa Mapping Surveys (Blood smear) 2015 Download map png Download map
Central Africa Mapping Surveys (EWH-Questionnaire) 2000 - 2014 Download map png Download map
Africa Continent Mapping Surveys (EWH-Questionnaire) 2000 - 2014 Download map png Download map
Eastern Africa Mapping Surveys (EWH-Questionnaire) 2000 - 2014 Download map png Download map
Western Africa Mapping Surveys (EWH-Questionnaire) 2000 - 2014 Download map png Download map
Southern Africa Mapping Surveys (EWH-Questionnaire) 2000 - 2014 Download map png Download map
WHO African Region (AFRO) Mapping Surveys (EWH-Questionnaire) 2000 - 2014 Download map png Download map
60 maps found
Region Location Program stage Years Maps Data
Central Africa Equatorial Guinea Endemicity 2017 Download map png Download map
Central Africa Angola Endemicity 2017 Download map png Download map
Central Africa Sao Tome & Principe Endemicity 2017 Download map png Download map
Western Africa Guinea-Bissau Endemicity 2017 Download map png Download map
Eastern Africa Rwanda Endemicity 2017 Download map png Download map
Western Africa Algeria Endemicity 2017 Download map png Download map
Southern Africa South Africa Endemicity 2017 Download map png Download map
Southern Africa Malawi Endemicity 2017 Download map png Download map
Central Africa Central African Republic Endemicity 2017 Download map png Download map
Eastern Africa Kenya Endemicity 2017 Download map png Download map
Western Africa Burkina Faso Endemicity 2017 Download map png Download map
Southern Africa eSwatini Endemicity 2017 Download map png Download map
Eastern Africa Ethiopia Endemicity 2017 Download map png Download map
Eastern Africa Seychelles Endemicity 2017 Download map png Download map
Southern Africa Zambia Endemicity 2017 Download map png Download map
Southern Africa Mozambique Endemicity 2017 Download map png Download map
Central Africa Republic of Congo Endemicity 2017 Download map png Download map
Central Africa Chad Endemicity 2017 Download map png Download map
Eastern Africa Comoros Endemicity 2017 Download map png Download map
Central Africa Burundi Endemicity 2017 Download map png Download map
Central Africa Gabon Endemicity 2017 Download map png Download map
Western Africa Sierra Leone Endemicity 2017 Download map png Download map
Southern Africa Zimbabwe Endemicity 2017 Download map png Download map
Southern Africa Namibia Endemicity 2017 Download map png Download map
Western Africa Cote d’Ivoire Endemicity 2017 Download map png Download map
Western Africa Togo Endemicity 2017 Download map png Download map
Southern Africa Lesotho Endemicity 2017 Download map png Download map
Western Africa Benin Endemicity 2017 Download map png Download map
Western Africa Ghana Endemicity 2017 Download map png Download map
Western Africa Senegal Endemicity 2017 Download map png Download map
Eastern Africa Tanzania (Zanzibar) Endemicity 2017 Download map png Download map
Western Africa Niger Endemicity 2017 Download map png Download map
Central Africa Cameroon Endemicity 2017 Download map png Download map
Eastern Africa Tanzania (Mainland) Endemicity 2017 Download map png Download map
Eastern Africa Madagascar Endemicity 2017 Download map png Download map
Southern Africa Botswana Endemicity 2017 Download map png Download map
Western Africa Guinea Endemicity 2017 Download map png Download map
Eastern Africa South Sudan Endemicity 2017 Download map png Download map
Mali Endemicity 2017 Download map png Download map
Western Africa Nigeria Endemicity 2017 Download map png Download map
Western Africa Cape Verde Endemicity 2017 Download map png Download map
Eastern Africa Uganda Endemicity 2017 Download map png Download map
Western Africa Mauritania Endemicity 2017 Download map png Download map
Central Africa Democratic Republic of the Congo Endemicity 2017 Download map png Download map
Central Africa Democratic Republic of the Congo Mapping Surveys (Blood smear) 2015 Download map png Download map
Central Africa Cameroon Mapping Surveys (Blood smear) 2015 Download map png Download map
Central Africa Gabon Mapping Surveys (Blood smear) 2015 Download map png Download map
Central Africa Equatorial Guinea Mapping Surveys (Blood smear) 2015 Download map png Download map
Western Africa Nigeria Mapping Surveys (Blood smear) 2015 Download map png Download map
Western Africa Nigeria Mapping Surveys (EWH-Questionnaire) 2002 - 2014 Download map png Download map
Central Africa Angola Mapping Surveys (EWH-Questionnaire) 2003 - 2011 Download map png Download map
Central Africa Gabon Mapping Surveys (EWH-Questionnaire) 2010 Download map png Download map
Central Africa Central African Republic Mapping Surveys (EWH-Questionnaire) 2010 Download map png Download map
Central Africa Chad Mapping Surveys (EWH-Questionnaire) 2010 Download map png Download map
Central Africa Democratic Republic of the Congo Mapping Surveys (EWH-Questionnaire) 2004 - 2010 Download map png Download map
Central Africa Republic of Congo Mapping Surveys (EWH-Questionnaire) 2004 - 2010 Download map png Download map
Central Africa Cameroon Mapping Surveys (EWH-Questionnaire) 2000 - 2010 Download map png Download map
Central Africa Equatorial Guinea Mapping Surveys (EWH-Questionnaire) 2008 Download map png Download map
Eastern Africa South Sudan Mapping Surveys (EWH-Questionnaire) 2005 - 2008 Download map png Download map
Eastern Africa Ethiopia Mapping Surveys (EWH-Questionnaire) 2002 - 2003 Download map png Download map

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