SUMMARYThalassemia is one of the most common genetic disorders in Egypt. With the total population of 70 million, there are approximately 600,000 affected individuals and more than 20 million thalassemia carriers. Thalassemia is therefore one of the major health problems in Egypt. B-Thalassemias are priority genetic diseases for prevention programs. Rapid genotype characterization is fundamental in the diagnostic laboratory, especially when offering prenatal diagnosis for carrier couples. Introduction of the real time PCR has made a revolution in the time taken for the PCR reactions. We present a method for the diagnosis of the common mutations of the B-thalassemia in Egyptian children & families. The procedure depends on the real-time PCR using specific fluorescently labeled hybridization probes. The melting temperature for each of the specific probes obtained after the PCR reaction permits the identification of the specific mutation. Genotyping of 20 thalassemic children attending the hematology clinic of the children specialized hospital and 10 controls was done using Real-time PCR and the conventional Amplification Refractory Mutation System (ARMS) technique. Analysis revealed identical results to most of the patients and they were further checked by the sequencing results of the DNA samples. The established method is a robust, fast and straight forward assay that allows the detection of the common B-thalassemia mutations in Egypt. The described LightCycler system protocol can rapidly screen for many B-globin gene mutations.
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