Thalassemia is a blood disease, which occurs in many places, especially in Mediterranean countries, the Middle East and Asia.
Thalassemia can be divided into two categories, namely A (α) and B (β). There are also mild, moderate and severe thalassemia. Because the proportion of moderate thalassemia is small, our explanation focuses on mild and severe thalassemia.
α and β thalassemia
In blood night, the normal hemoglobin component in red blood cells consists of two types of globin chains, which are called globin chains and globin chains respectively. Under normal circumstances, everyone will have two normal hemoglobin groups.
Reason; One is from the father, and the other is from the mother. If one or more abnormal genes are inherited from parents, the production of globin chain or globin chain will be reduced, leading to thalassemia. Make sure a person is type a.
Thalassemia (α) or (β) depends on the above genetic conditions.
Mild thalassemia
Mild thalassemia refers to patients with thalassemia gene, so it is also called thalassemia gene carrier. Most thalassemia gene carriers have no symptoms and do not need treatment. Only a few people have it.
Mild anemia. Most thalassemia gene carriers don't know that they have this gene unless they have a blood test. It is estimated that there are 550,000 thalassemia gene carriers in Hong Kong, accounting for 8.5% of the total population.