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Les eaux des stations aquacoles et des milieux lagunaires sont susceptibles de contenir de grandes quantites de polluants organiques et de vehiculer une diversite d’agents pathogenes (virus, bacteries, parasites) pour l’homme et les especes aquatiques. La preservation de ces ecosystemes necessite donc une meilleure connaissance de leurs caracteristiques. Cette etude a ete menee afin de determiner la qualite de l’eau des stations aquacoles de Layo et de Jacqueville implantees sur les rives de la lagune Ebrie. Au total, 48 echantillons d’eau provenant de 8 sites ont ete analyses de mars a octobre 2015. Les parametres physico-chimiques ont ete mesures in situ et analyses selon les methodes conventionnelles de la chimie. Le denombrement de coliformes fecaux et de Vibrio a ete effectue selon la technique des membranes filtrantes. Le pH varie de 5,7 a 7,6, la temperature de 28,2 a 30,1 °C, la salinite de 0,1 a 6,52‰, la conductivite de 0,23 a 5,84 mS/cm et l’oxygene dissous de 2,43 a 7,76 mg/l. Les concentrations des solides totaux dissous varient de 0,18 a 10,21 mg/l et celles des matieres en suspension de 4,3 a 57,3 mg/l. Les teneurs de nitrate et de nitrite sont respectivement de 0,06 a 1,75 mg/l et de 0,002 a 0,038 mg/l. Les charges de coliformes fecaux varient de 3,21 a 4,29 log UFC/100 ml et celles de Vibrio de 3,3 a 4,26 log UFC/100 ml. Cette etude indique une forte contamination bacterienne des eaux et des concentrations de nitrate et nitrite dans les limites autorisees par l’OMS. © 2017 International Formulae Group. All rights reserved. Mots cles: Vibrio , coliformes, parametres physico-chimiques, stations aquacoles, lagune Ebrie English Title:  Physicochemical and bacteriological characterization of water from the aquaculture stations of Layo and Jacqueville (Ebrie lagoon, Ivory Coast) English Abstract Waters of aquaculture stations and the lagoon environments are likely to contain large quantities of organic pollutants and to convey a diversity of pathogens (viruses, bacteria, parasites) for human and aquatic organisms. The preservation of these ecosystems therefore requires a better knowledge of their characteristics. This study was conducted to determine the water quality of aquaculture stations of Layo and Jacqueville  located on the shores of the lagoon Ebrie. In total, 48 samples of water from 8 sites have been analyzed from march to october 2015. The physico-chemical parameters were measured in situ and analyzed according to the conventional methods of chemistry. The fecal coliforms and Vibrio counts have been carried out according to the technique of membrane filtration. The pH ranges from 5.7 to 7.6, the temperature from 28.2 to 30.1 °C, the salinity from 0.1 to 6.52‰, the conductivity from 0.23 to 5.84 mS/cm and dissolved oxygen from 2.43 to 7.76 mg/l. The concentrations of total dissolved solids vary from 0.18 to 10.21 mg/l and those of suspended solids from 4.3 to 57.3 mg/l. Nitrate and nitrite contents range respectively from 0.06 to 1.75 mg/l and from 0.002 to 0.038 mg/l. fecal coliforms loads vary from 3.21 to 4.29 log CFU/100 ml and Vibrio from 3.3 to 4.26 log CFU/100 ml. This study indicates a high bacterial contamination of water and nitrate and nitrite levels are within the limits authorized by WHO. © 2017 International Formulae Group. All rights reserved. Keywords:  Vibrio , Coliforms, physicochemical parameters, aquaculture stations, Ebrie lagoon

Caractérisations physico-chimiques et bactériologiques des eaux des stations aquacoles de Layo et de Jacqueville (Lagune Ebrié, Côte d’Ivoire)