title: Frequencies of Duffy blood group alleles in Northern Pakistani donors.
abstract: OBJECTIVE
  Find the allele frequencies of Duffy blood group antigens in donor population from northern Pakistan.
  
  
  METHODS
  Cross sectional study.
  
  
  METHODS
  Armed Forces Institute of Transfusion (AFIT), Rawalpindi in year 2012.
  
  
  METHODS
  A total of 1000 healthy, adult blood donors were included in the study. Blood samples were collected in ethylenediamine tetra aceticacid (EDTA) tube and then tested with anti sera Fy(a) and Fy(b) by the tube method.
  
  
  RESULTS
  The allele frequencies of Duffy blood group antigens were calculated. The most common phenotype was Fy(a+b+) which was present in 552 (55.2%) donors followed by the Fy(a+b-) phenotype in 228 (22.8%) donors, while 178 (17.8%) were Fy(a-b+) and the least prevalent phenotype was Fy(a-b-) which was present in 42 (4.2%) of donors.
  
  
  CONCLUSIONS
  The majority of our population is heterozygous for Duffy antigens a and b.
authors.affiliation: Armed Forces Institute of Pathology, Rawalpindi, Pakistan. Electronic address: sunila.tashfeen@yahoo.com.
authors.forename: Sunila
authors.initials: S
authors.lastname: Tashfeen
authors.affiliation: Armed Forces Institute of Transfusion, Rawalpindi, Pakistan.
authors.forename: Nuzhat
authors.initials: N
authors.lastname: Salamat
authors.affiliation: Armed Forces Institute of Transfusion, Rawalpindi, Pakistan.
authors.forename: Saleem
authors.initials: S
authors.lastname: Ahmed
mesh_terms: D000293:Adolescent; D000328:Adult; D000483:Alleles; D001782:Blood Donors; D004375:Duffy Blood-Group System / Q000235:genetics*; D005260:Female; D005787:Gene Frequency; D006579:Heterozygote; D006801:Humans; D008297:Male; D008875:Middle Aged; D010154:Pakistan
chemical_list: D004375:Duffy Blood-Group System
keywords: Duffy antigen; Pakistani donors