Related Experiment Videos
The pathogenesis of hypochromic anaemia in Saudi infants
Insights
Alpha-thalassemia, a genetic blood disorder, is a significant cause of hypochromic anemia in Saudi infants, often misdiagnosed as iron deficiency. This finding impacts nutritional programs and anemia diagnosis in the region.
Area of Science:
- Hematology
- Genetics
- Pediatrics
Background:
- Hypochromic anemia is prevalent in Saudi infants, but iron deficiency is not always the primary cause.
- Previous assessments may have misattributed anemia to iron deficiency without considering genetic factors.
Purpose of the Study:
- To investigate the causes of hypochromic anemia in Saudi Bedouin infants.
- To determine the prevalence of iron deficiency and alpha-thalassemia in this population.
Main Methods:
- Studied 138 Saudi Bedouin infants aged 9 months.
- Assessed serum ferritin levels and hemoglobin A2.
- Conducted DNA analysis of cord blood for alpha-thalassemia gene deletion (-alpha 3.7).
Main Results:
- 25% of infants had hypochromic anemia, but less than 10% showed iron deficiency.
- Alpha-thalassemia gene deletion (-alpha 3.7) frequency was 0.13 in the Bedouin population.
- Many anemic infants had normal iron status and hemoglobin A2 levels.
Conclusions:
- Alpha-thalassemia is a major contributor to hypochromic anemia in Saudi infants, often overlooked.
- Accurate diagnosis requires considering genetic factors alongside iron status.
- Findings are crucial for effective nutritional programs and interpreting red blood cell indices.
Abstract:
The pathogenesis of hypochromic anaemia was studied in 138 Saudi bedouin infants aged 9 months. Approximately 25 per cent had hypochromic anaemia, but less than 10 per cent had serum ferritin levels indicative of iron deficiency. A few infants had heterozygous beta-thalassaemia, but many infants with hypochromic anaemia had normal haemoglobin A2 levels together with serum ferritin levels above 20 micrograms/l. DNA analysis of cord blood taken from the hospital where the infants were born showed that the frequency of the single alpha-globin gene deletion type (-alpha 3.7) of alpha-thalassaemia is 0.13 in the bedouin population of Western Saudi Arabia. alpha-Thalassaemia probably accounts for much of the anaemia previously thought to be due to iron deficiency in Saudi infants. Studies of iron status and estimation of the frequency of genetic causes of hypochromic anaemia are important when assessing the need for widespread nutritional programmes to prevent iron deficiency and in the interpretation of reference ranges of red cell indices in populations from malarial areas.