The aim of this study was the determination of hemoglobin (Hb) variants and ABO blood groups in a school population aged 6 to 9 years in the township of Agbandé-Yaka in North Togo. A cross-sectional study was carried out on 570 children of four primary schools at Agbande-Yaka, between March and July 2010. Hemoglobin characterization was done by alkaline buffer electrophoresis and the blood types ABO-Rhesus (Rh) D by immuno-hematological methods. A Hb variant was detected in 37.0% of the schoolchildren. Among them, the AS trait accounted for 11.9% and the AC trait for 20.2%. Homozygous Hb S (HBB: c.20A>T) was not found but Hb C (HBB: c.19G>A) appeared at a frequency of 3.3%, while compound heterozygotes carrying Hb SC were seen at a frequency of 1.6%. The O, B and A blood groups accounted for 49.0, 26.8 and 21.9%, respectively. The Hb anomalies reached a high prevalence in this school population. These results are remarkable by the absence of homozygous Hb S individuals compared to homozygous Hb C individuals, which were as numerous as expected. The frequencies of the ABO blood groups are similar to what has been found in other West African populations.
Décrire les différents types de transcrits de fusion moléculaire bcr-abl afin d'évaluer leur fréquence et étudier leurs influences sur les paramètres de l'hémogramme au diagnostic. Il s'agit d'une étude prospective de 34 patients porteurs d'une leucémie myéloïde chronique au Togo. La recherche des transcrits de fusion a été réalisée au laboratoire d'hématologie biologique de l'hôpital Henri Mondor à Créteil (France). L'âge moyen des patients était de 42,32±14,87 ans avec des extrêmes de 9 et 65ans. On notait une prédominance masculine avec un sex- ratio de 1,61 (21 hommes et 13 femmes). L'étude moléculaire révélait deux types de transcrits b3-a2 et b2-a2. Dix-neuf patients (55,88%) avaient le transcrit b3-a2, 13 (38,24%) le transcrit b2-a2 (32,10 %) et deux patients possédaient les deux types de transcrits b3-a2 et b2-a2 (5,88%). Au diagnostic, le taux d'hémoglobine moyen, le nombre moyen de globules blancs, le chiffre moyen des plaquettes chez les patients porteurs du transcrit b3-a2 étaient respectivement de 99,2g/l ; 207,63G/l et 451,28G/l. Pour les patients porteurs du transcrit b2-a2 les valeurs sont 104,6g/l, 114,32G/l et 486,11G/l. Les patients ayant les deux types de transcrit de fusion avaient respectivement 67g/l, 867G/l et 780G/l. Les paramètres de l'hémogramme sont significativement plus perturbés chez les patients porteurs des deux types de transcrits b3-a2 et b2-a2.
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