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