2. Subjects and methods
The study design was approved by the Research Ethics Committee, College of Science, Haramaya University, Dire Dawa, Ethiopia. A total of 441 subjects of both sexes from Silte Secondary and Preparatory school were randomly selected and included in this study. The students were divided into 3 major ethnic groups i.e., Sodo, Silte and Meskan. Informed consent was granted prior to the sample collection. Blood samples were collected fresh without any anti-coagulant by finger prick with sterile lancet using an open slide method of testing ABO blood types and Rh (D) factor [10]. Before pricking the bulb was sterilized with alcohol swab, compressed and pricked slightly with the help of lancet, the oozed blood was placed on a clean slide at three places over a glass slide and to each blood drop placed at separate places a drop of anti-sera (anti-A, anti-B and anti- D) (manufactured by Tulip Diagnostics (P) Limited, Old Goa, India) was added and separately observed for the agglutination. The grouping was done by antigen-antibody agglutination test.
Allele frequencies were calculated under the assumption of Hardy–Weinberg equilibrium and expressed as percentages. Chi-square test was used to compare observed allelic and geno- typic frequency distributions of the blood group and Rh anti- gens to that expected under the Hardy–Weinberg.
2. Subjects and methodsThe study design was approved by the Research Ethics Committee, College of Science, Haramaya University, Dire Dawa, Ethiopia. A total of 441 subjects of both sexes from Silte Secondary and Preparatory school were randomly selected and included in this study. The students were divided into 3 major ethnic groups i.e., Sodo, Silte and Meskan. Informed consent was granted prior to the sample collection. Blood samples were collected fresh without any anti-coagulant by finger prick with sterile lancet using an open slide method of testing ABO blood types and Rh (D) factor [10]. Before pricking the bulb was sterilized with alcohol swab, compressed and pricked slightly with the help of lancet, the oozed blood was placed on a clean slide at three places over a glass slide and to each blood drop placed at separate places a drop of anti-sera (anti-A, anti-B and anti- D) (manufactured by Tulip Diagnostics (P) Limited, Old Goa, India) was added and separately observed for the agglutination. The grouping was done by antigen-antibody agglutination test.Allele frequencies were calculated under the assumption of Hardy–Weinberg equilibrium and expressed as percentages. Chi-square test was used to compare observed allelic and geno- typic frequency distributions of the blood group and Rh anti- gens to that expected under the Hardy–Weinberg.
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2. Subjects and methods
The study design was approved by the Research Ethics Committee, College of Science, Haramaya University, Dire Dawa, Ethiopia. A total of 441 subjects of both sexes from Silte Secondary and Preparatory school were randomly selected and included in this study. The students were divided into 3 major ethnic groups i.e., Sodo, Silte and Meskan. Informed consent was granted prior to the sample collection. Blood samples were collected fresh without any anti-coagulant by finger prick with sterile lancet using an open slide method of testing ABO blood types and Rh (D) factor [10]. Before pricking the bulb was sterilized with alcohol swab, compressed and pricked slightly with the help of lancet, the oozed blood was placed on a clean slide at three places over a glass slide and to each blood drop placed at separate places a drop of anti-sera (anti-A, anti-B and anti- D) (manufactured by Tulip Diagnostics (P) Limited, Old Goa, India) was added and separately observed for the agglutination. The grouping was done by antigen-antibody agglutination test.
Allele frequencies were calculated under the assumption of Hardy–Weinberg equilibrium and expressed as percentages. Chi-square test was used to compare observed allelic and geno- typic frequency distributions of the blood group and Rh anti- gens to that expected under the Hardy–Weinberg.
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