title: Frequency of ABH secretors and non secretors: A cross sectional study in Karachi.
abstract: OBJECTIVE
  ABO blood group and secretor status is valuable in relation to some diseases in clinical and forensic medicine. Across the globe there are geographic and racial differences in the frequency of secretors and non-secretors. Aim of this study was to evaluate the status of ABH blood group secretors and non-secretors in Karachi (Pakistan).
  
  
  METHODS
  Blood and saliva samples were randomly collected from one hundred and one (n=101) healthy adult students (76 male, 25 female) ranging in age from 15 to 40 years. Their ABO and Rhesus blood groups were determined by conventional methods, and their secretor status was studied by hemagglutination inhibition method of saliva.
  
  
  RESULTS
  RESULTS showed that 64.4% of the study population were ABH blood group secretors while 35.6% were non-secretors. Frequencies of the secretor status among various ABO blood groups were 71.4% in group A, 79.5% in group B, 45.5% in group AB, and 61.5% in group O.
  
  
  CONCLUSIONS
  Frequency of ABH secretor is high (64.4%). Blood group B has the highest secretor (79.5%) frequency while Blood group AB has the lowest (45.5%).
authors.affiliation: Dr. Muhammad Saboor, PhD, Baqai Institute of Hematology, Baqai Medical University, Karachi, Pakistan.
authors.forename: Muhammad
authors.initials: M
authors.lastname: Saboor
authors.affiliation: Aman Ullah, M.Sc (Hematology), Baqai Institute of Hematology, Baqai Medical University, Karachi, Pakistan.
authors.forename: Aman
authors.initials: A
authors.lastname: Ullah
authors.affiliation: Khansa Qamar, M.Sc (Hematology), Baqai Institute of Hematology, Baqai Medical University, Karachi, Pakistan.
authors.forename: Khansa
authors.initials: K
authors.lastname: Qamar
authors.affiliation: Awal Mir, M.Sc (Hematology), Baqai Institute of Hematology, Baqai Medical University, Karachi, Pakistan.
authors.forename: Awal
authors.initials: A
authors.lastname: Mir
authors.affiliation: Dr. Moinuddin, FRCP (C), FRCP (E), Baqai Institute of Hematology, Baqai Medical University, Karachi, Pakistan.
authors.lastname: Moinuddin
keywords: ABH; ABO group; Non-secretors; Secretors