摘要：Figures Tables Authors Richard M’bra Kouassi 12 * Brama Koné 13 Étienne Kouakou Yao 14 Bétio Silué 14 Guéladio Cissé 5 Nagnin Soro 2 1 Centre suisse de recherches scientifiques en Côte d’Ivoire Km 17 route de Dabou Adiopodoumé Yopougon 01 BP 1303 Abidjan Côte d’Ivoire 2 Université Félix Houphouët Boigny 01 BP 1303 Abidjan 01 Côte d’Ivoire 3 Université Péléforo Gon Coulibaly Korhogo 01 BP 1303 Abidjan 01 Côte d’Ivoire 4 Université Nangui Abrogoua 01 BP 1303 Abidjan 01 Côte d’Ivoire 5 Institut tropical et de santé publique suisse Université de Bale Socinstrasse 57 Postfach CH-4002 Bale * Tirés à part Key words: water supply, risk assessment, seasonal variation, Escherichia coli, Korhogo DOI : 10.1684/ers.2015.0781 Page(s) : 230-41 Published in: 2015 Access to safe water supply and sanitation in developing countries is challenging and this situation was aggravated in the city of Korhogo (Nord Côte d’Ivoire) due to huge climate variability during the decade 2000-2010. The objectives of the study are to : (i) characterize water access in Korhogo, (ii) determine the environmental and socio-sanitary factors which affect water's quality and availability, (iii) assess health risks associated to waters use. Two household surveys by questionnaire and two geographical surveys were conducted in 2010 in 600 households respectively during dry and rainy seasons. A health surveys and laboratory analyzes of water samples from wells and dam were performed. The quantitative microbial risk assessment (QMRA) was used to quantify the health risks associated with Escherichia coli and Giardia lamblia. It appears from this study that the stagnant wastewater and solid wastes are the potential risk factors for well-water pollution. Wells water is the main source of household's water supply in the city during the rainy season (60 %) and the dry season (65 %). The QMRA shows that there is a risk of E. coli infection due to wells and dam water. Annual probable infected cases are 2’002 ; 1’280 ; 59 ; and 24 persons respectively due to well-water consumption, gardening around the dam, fishing and swimming in the dam water. The results of this study are useful for the implementation of an integrated mitigation strategy of health risks due to water supply and hygiene deficiency that may increase with climate changes in the city of Korhogo.
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