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July 1988, Volume 38, Issue 7

Letters To Editor



An individuals blood group today, is as important as the national identity card. The obvious reason being blood transfusion in cases of emergency. Blood group data of a population is also important from a laboratory viewpoint, since it guides blood banks on number and types of blood to be stored for transfusion services. ABO group data is well established in Pakistan1-2, however A sub-group data is not available at least for Karachi population ,since antisera for A sub-groups have recently become available in Pakistan. We report ABO and A subgroups in Karachi population from tests done on 1500 individuals.
The overall ABO and Rhesus frequency is given in Table 1.

This data is similar to frequency reported from Karachiā€™ and Lahore2.
ABO and A sub-groups for males and females in Rhesus positive and negative individuals are given in Table II.

Our results for A sub-groups are similar to the frequencies reported from Lahore2 and NWFP3.
However the frequencies in males and females of the rhesus negative group is rather different from the overall and rhesus positive individuals. Since individuals of rhesus negative group are few in our population one needs a larger sample of this group to attach any significance to this fmding.
We report this data firstly to refresh old knowledge of ABO groups in our population and add A sub-groups to Karachi data and secondly to provide guideline to blood banks in Karachi for numbers and types of blood to be stored.

Adil Jamal, Moharnmad Shamim Ahmed,
1. Altaf Ahmed, Mirza Naqi Zafar and Sirajuddaula Syed.
2. Dr. Ziauddin Hospitai Laboratory, Allama Rasheed Turabi Road, North Nazimabad, Karachi.


1. Arif, M.A. Neonatal jaundice due to Rhesus and AB isoimmunisation and frequency of these antigens in Pakistani mothers. JPMA., 1982; 32:165.
2. Parveen, N. ABO and sub-groups of blood group A in the Lahore population. JPMA., 1987; 37200.
3. Mourant, A.E. and Kopec, A.D. A. The distriĀ¬bution of human blood groups and other poiyri morphism. 2nd ed. Oxford, Oxford University Press, 1976,p. 1168.

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