FREQUENCY OF ABO AND RHESUS BLOOD GROUPS IN DISTRICT SWAT, PAKISTAN
Abstract
Background: Up till now about 400 red cells antigen have been identified. The majority are inheritedby Mendelian Fashion. The ABO blood group system was first to be identified and RH blood group
system was the 4th one, both are most important for blood transfusion purposes. This study is conducted
to determine the frequency of ABO and Rhesus (Rh) blood groups in District Swat, NWFP, Pakistan. It
is a cross sectional prospective study and was conducted at Saidu Teaching Hospital district Swat, over
a period of one year. (1st Jan, 2007 to 31st Dec, 2007). Methods: A total of 22897 subjects were
included in this study. Patients were collected from different wards of Saidu Teaching Hospital while
the donors from common population. From each subject blood was collected, ABO and Rh blood
grouping were carried out by tile method using commercially prepared anti sera. The frequency of each
type was calculated. Results: Out of 22897 subjects 17141 (74.86%) were male subjects and 5756
(25.14%) were female. Out of 17141 male subjects 15597 (90.99%) and out of 5756 female subjects
5040 (87.56%) were found to be Rh-positive. The frequency of Rh-negative group in male subjects
were (9.01%) where as in female subjects were (12.22%). The frequency of A, B, O and AB groups in
Rh-positive male subjects were 25.63%, 29.54%, 26.04% and 9.78%, amongst female subjects, it was
24.53%, 28.06%, 25.54% and 9.43% respectively. In Rh-negative male subjects the frequency of A, B,
O and AB is 2.25%, 2.88%, 3.01% and 0.88%, while amongst females it is 3.54%, 4.24%, 3.74% and
0.92% respectively. Conclusion: It is concluded from this study that frequency of Rh-positive blood
group is B, O, A, and AB in both gender. Where as the most common Rh-negative in male and female
subjects are O, B, A, AB, and B, O, A, and AB respectively.
Keywords: ABO blood group, Rh blood group, Swat, Pakistan
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