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β thalassemia major (Mediterranean anemia or Cooley anemia) is caused by a β o /β o genotype. No functional β chains are produced, and thus no hemoglobin A can be assembled. This is the most severe form of β-thalassemia. β thalassemia intermedia is caused by a β + /β o or β + /β + genotype. In this form, some hemoglobin A is produced.
The prevalence of Hemoglobin H disease mirrors that of the hemoglobinopathies. As a whole, they are most prevalent in individuals of Asian, African, and Mediterranean decent. [5] There is a protective effect against malaria for individuals carrying thalassemia genes, which explains the high frequency of thalassemia within the worldwide ...
Alpha thalassemia is has greatest prevalence in populations originating from Southeast Asia, Mediterranean countries, Africa, the Middle East, India, and Central Asia. [8] Having a mild form of alpha thalassemia has been demonstrated to protect against malaria and thus can be an advantage in malaria endemic areas. [13]
Beta-thalassemia; Other names: Microcytemia, beta type [1] Beta thalassemia genetics, the picture shows one example of how beta thalassemia is inherited. The beta globin gene is located on chromosome 11. A child inherits two beta globin genes (one from each parent). Specialty: Hematology: Types: Thalassemia minor, intermediate and major [2] Causes
Therefore, most transfusion-dependent thalassemia patients can be diagnosed within the first few years of life, which severe anemia, differed growth, jaundice and hepatosplenomegaly can be observed. Parameters for confirmation includes baseline hemoglobin level <7g/dL, enlargement of liver and spleen (>5 cm) and height in the first 10th percentile.
Within a given English-speaking country, there is a form of the language considered to be Standard English: the Standard Englishes of different countries differ and can themselves be considered dialects. Standard English is often associated with the more educated layers of society as well as more formal registers. British and American English ...
Patient may present with symptomatic anemia or with sickle crises. In the United States and other countries with new-born screening programs, the disease may be identified in neonates. [4] Diagnostic tests include DNA sequencing, hemoglobin electrophoresis, and high-performance liquid chromatography. [5]
This is a list of countries by number of languages according to the 22nd edition of Ethnologue (2019). [ 1 ] Papua New Guinea has the largest number of languages in the world.