title: ABO and rhesus blood group distribution in Kurds.
abstract: BACKGROUND
  It is well established that ABO and rhesus (Rh) genes and phenotypes vary widely between ethnic groups and both within and between geographical areas. The aim of this study was to determine the distribution of ABO and Rh blood groups in Kurds and to compare it with those of other populations.
  
  
  METHODS
  The study included blood grouping of total population of 53,234 whose ABO and Rh blood groups were determined by standard methods during a period of about 5 years (2005-2009).
  
  
  RESULTS
  The most prevalent blood group was O (37.16%), followed by blood groups A (32.47%) and B (23.84%), whereas the least prevalent blood group was AB (6.53%). The majority 91.73% were Rh positive, and 8.27% were Rh negative. Data showed that among the Rh-positive individuals, 34.03% were O, 29.99% were A, 21.69% were B, and 6.02% were AB. Break up of the Rh negatives showed that 3.13% were group O, 2.48% were A, 2.15% were B, and 0.51% were AB.
  
  
  CONCLUSIONS
  Blood group O is the commonest blood group in, followed by A, B, and AB. More than 91% of the study population is Rh positive. Also, we can conclude that distribution of ABO and Rh blood groups in Kurds, in addition to being close to the mean of the world's population, is closest to Iranians, with similar trend to the neighboring countries, and appears to be intermediate between eastern (Asian) and western European (Caucasian) data.
authors.affiliation: Department of Pathology, College of Medicine, Hawler Medical University (Formerly Salahaddin University), Erbil, Kurdistan Region, Iraq.
authors.forename: Mohamad S
authors.initials: MS
authors.lastname: Jaff