Spectrum of Thalassemia and Hemoglobinopathy Using Capillary Zone Electrophoresis: A Facility-Based Single Centred Study at icddr,b in Bangladesh

Abstract

Background: Although the global thalassemia zone covers Bangladesh, there are very limited studies conducted in this region. Therefore, the focus of our study is to understand the prevalence and burden of thalassemia and hemoglobinopathy in Bangladesh. Methods: The analysis was based on a retrospective evaluation of laboratory diagnoses between 2007 January and 2021 October. A total of 8503 specimens were sampled and analyzed which were either referred by corresponding physicians or self-referred. This was neither any epidemiological nationwide survey nor was the study population chosen randomly. Hematological data were obtained through capillary zone electrophoresis and corresponding complete blood count. Results: 1971 samples (~23.18% of the total) were found with at least one inherited hemoglobin disorder. The most common hemoglobin disorder observed was the hemoglobin E (Hb E) trait (10.67%), followed by the β-thalassemia trait (8.4%), homozygotic Hb E (1.59%), and Hb E/β-thalassemia (1.58%). Other variants found in this study with minimal percentages were Hb N-Seattle, Hb S, Hb D-Punjab, Hb Lepore, Hb C, Hb Hope, Hb H, and hereditary persistence of fetal hemoglobin. Discussion: The pattern of thalassemia and hemoglobinopathy in our study is diverse and heterogeneous. A broad and detailed spectrum of such inherited hemoglobin disorders will ultimately be helpful in implementing nationwide thalassemia management and strategy policy in Bangladesh.