Distribution of human adult lactose phenotypes in Egypt
| Autor: | Wolfgang Kühnau, Gebhard Flatz, Laila Hussein, Sibylle D. Flatz |
|---|---|
| Rok vydání: | 1982 |
| Předmět: |
Adult
Male Veterinary medicine Adolescent medicine.medical_treatment Biology chemistry.chemical_compound Lactose Intolerance Gene Frequency Lactose Tolerance Test Genetics medicine Humans Lactose tolerance test Lactose Nile delta Genetics (clinical) medicine.diagnostic_test business.industry Age Factors virus diseases Lactase Biological evolution beta-Galactosidase Biological Evolution Biotechnology Diet Galactosidases Phenotype chemistry Gene Expression Regulation Egypt business Hydrogen breath test |
| Zdroj: | Europe PubMed Central |
| ISSN: | 0001-5652 |
| Popis: | Lactose absorption was studied in 570 health adolescent and adult males in Egypt. Employing a field version of the noninvasive hydrogen breath test, 156 (27.4%) lactose absorbers and 414 (72.6%) lactose malabsorbers were identified. The age-specific prevalence of the lactose phenotypes indicated that lactase repression is complete at the age of 14 years in Egyptians. The regional distribution showed significant differences between the Nile Delta and the northern and southern part of Upper Egypt. The existence of a north-south gradient of decreasing frequencies of the hypolactasia gene from the Nile Delta to the Sudan is suggested. |
| Databáze: | OpenAIRE |
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