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En Afrique subsaharienne, les infections transmissibles par la transfusion sanguine comme la syphilis sont tres repandues, avec une prevalence pouvant atteindre 25% chez les donneurs de sang. La presente etude avait pour objectif de determiner la prevalence de la syphilis chez les donneurs de sang au niveau de la Banque du Sang d’Abeche. Nous avons mene une etude transversale a visee descriptive, qui s’est deroulee de mai a aout 2017. Les echantillons de sang des donneurs ont ete testes par immunochromatographie pour la detection des anticorps anti-treponemiques (Biomnis®). Sur 789 donneurs de sang inclus dans l’etude, la prevalence de la syphilis etait de 4,9 %. Les donneurs etaient a 96,1% de sexe masculin et 3,9% de sexe feminin. Cette prevalence etait plus elevee chez les sujets âges de [21-30] ans, chez les femmes, les donneurs non scolarises, divorces et les domestiques/menageres habitant la zone d’Abeche urbaine. Ces resultats montrent qu’il est necessaire de mettre en place une politique de suivi et de prise en charge medicale des donneurs de sang atteints de la syphilis.Mots cles: Transfusion sanguine, receveurs, Treponema pallidum, don de sang.   English Title: Prevalence of syphilis in blood donors at Abeche blood bank in ChadIn sub-Saharan Africa, infections transmitted by blood transfusion such as syphilis are widespread, with prevalence up to 25% in blood donors. The purpose of this study was to determine the prevalence of syphilis in blood donors at the Blood Bank of Abeche. It was a descriptive cross-sectional study, which ran from May to August 2017. Donor blood samples were tested by immunochromatography for the detection of anti-treponemal antibodies (Biomnis®). Of the 789 blood donors included in the study, the prevalence of syphilis was 4.9%. Donors were 96.1% male and 3.9% female. This prevalence was higher in subjects aged [21-30] years, women, out-of-school, divorced and domestic / household donors living in the urban Abeche area. These results shows that it is necessary to set up a policy of monitoring and medical care of blood donors with syphilis.Keywords: Blood transfusion, recipients, Treponema pallidum, blood donation.

Prévalence de la syphilis chez les donneurs de sang à la Banque du Sang d’Abéché au Tchad