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Au Senegal, la maladie de Gumboro constitue un veritable obstacle pour le  developpement de l’aviculture semi-intensive. Une etude epidemiologique portant sur cette affection dans les exploitations semiintensives a ete conduite en  decembre 2015 dans les regions de Dakar et Thies. Elle a consiste a evaluer l’association entre des facteurs de risque et l’apparition de la maladie. Pour cela, les gestionnaires de 56 exploitations infectees et 112 indemnes ont constitue les cibles de cette enquete. Les foyers etaient suspectes sur la base des manifestations cliniques et confirmes par la detection du virus avec la RT-PCR. Ainsi, les resultats indiquent une faible liaison entre la presence d’oiseaux  domestiques ou sauvages et l’apparition de la maladie (Odds Ratio = 1,44). Par  contre, la presence de rongeurs (Odds = 22), la gestion des cadavres (Odds Ratio = 7,56) et l’acces des personnes etrangeres (Odds Ratio = 4,47) sont fortement lies a l’apparition de la maladie. La sensibilisation sur la gestion des poulets infectes et morts contribuerait a limiter la dissemination du virus et les pertes attribuables a la maladie. Mots cles : Epidemiologie, facteurs de risque, Odds Ratio, Senegal, Maladie de Gumboro. English Title:  Risk factors related to the appearance of Gumboro disease in semi-intensive poultry farms in Senegal English Abstract In Senegal, Gumboro disease is a real obstacle to the development of  semi-intensive poultry farming. An epidemiological study of this disease in  semi-intensive poultry farms was carried out in December 2015 in the regions of Dakar and Thies. The study consisted to assess the association between risk  factors at the onset of the disease. To do so, 56 chicken coop managers of infected farms and 112 disease-free farms were targeted for the survey. The outbreaks of infectious bursal disease virus were suspected on the basis of the clinical manifestations, and confirmed by the detection of virus with RT-PCR. Thus, the results indicated that a weak linkage between the presence of domestic or wild birds and the onset of the disease (Odds Ratio = 1.44). On the other hand, the presence of rodents (Odds = 22), cadaver management (Odds Ratio = 7.56) and the access of foreign people in the farm (Odds Ratio = 4.47) are strongly related to the onset of Gumboro disease. Sensitization on the management of infected and dead chickens would help to limit the spread of the virus and the losses attributable to the disease. Keywords : Epidemiology, Risk factor, Odds ratio, Senegal, Gumboro, disease.

Facteurs de risque liés à l’apparition de la maladie de Gumboro en aviculture semi-intensive au Sénégal