Hemoglobins S and C in Upper Volta |
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Authors: | D Labie C Richin J Pagnier M Gentilini R L Nagel |
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Institution: | (1) Institute de Pathologie et Biologie, Moleculaire et Cellulaire, I.N.S.E.R.M. U15, C.H.U. Cochin, F-Paris, France;(2) Departement de Parasitologie, C.H.U. Pitie-Salpetriere, F-Paris, France;(3) Division of Hematology, Albert Einstein College of Medicine, 10461 Bronx, NY, USA |
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Abstract: | Summary We have studied the incidence of hemoglobinopathies in 1059 individuals in Upper Volta. We have found that this population has a high frequency of HbS and HbC and -thalassemia. The gene frequency of HbS was high (0.1 for the S gene) in the arid Sahel portion of Upper Volta accompanied by a lower frequency for HbC (0.05 for the c gene). The reverse was true in the humid Savanna region of this country (0.03 for the S gene and 0.14 for the c gene). There was no age dependency of the HbS gene frequency, but -thalassemia, detectable in HbS heterozygotes, showed a statistically significant decrease with age. No homozygote for HbS was detected after the age of 1 year, and SC and CC genotypes were found at a lower incidence than expected. The environmental and medical conditions in Upper Volta preclude the survival of SS individuals and decrease the survival of SC and CC genotypes. |
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