Haemoglobin variants or haemoglobin disorders are a group of clinical disorders characterised by impairment of synthesis of normal adult haemoglobin, due to genetically determined abnormality in the formation of the globin moiety of the molecule. These disorders fall into two broad groups, that is qualitative (haemoglobinopathies) and quantitative (thalassaemias). In the anthropoids, the most common congenital single-gene disorder is the alteration of the globin genes which account for about 270 million carriers globally. These globin gene alterations cause low/no globin expression (thalassaemia) or abnormal globin protein production (haemoglobinopathy). The clinical manifestation of haemoglobin disorder is the culminated measure of one’s genetic and molecular makeup. Summarily, the study, diagnosis and management of thalassaemia are models of biological principles of human disease. Newborn screening, however, is a system that aims at improving management and/or eradication of genetic disorders from the neonatal stage of life. This chapter will be dealing with the definition and steps involved in newborn screening for thalassaemia.
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