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  • Title: Detection and screening of bovine leukocyte adhesion deficiency in Pakistan using molecular methods.
    Author: Nasreen F, Altaf Malik N, Naeem Riaz M, Anver Qureshi J.
    Journal: Hereditas; 2009 May; 146(2):74-8. PubMed ID: 19490168.
    Abstract:
    Bovine leukocyte adhesion deficiency (BLAD) is an autosomal recessive disease. Affected animals die because of extreme susceptibility to infections caused by the lack of a membrane glycoprotein called the leukocyte integrin beta-2 subunit of CD18. The present study was planned to standardize a technique for the diagnosis of BLAD and to get an estimation of BLAD allele in the Pakistani cattle population. The study was performed on 700 animals including Holstein-Friesian (HF) (n=280), Friesian-Sahiwal (FS) (n=120) Sahiwal (n=100) cows and HF calves (n=59) from Government as well as private farms. Similarly 141 bulls of Sahiwal (n=100), HF (n=18) and FS (n=23) from the Semen Production Unit Qadirabad and Kherimorat were also sampled. The identification of normal, carrier and affected animals were made by the PCR-RFLP method. No animal was found homozygous for BLAD while 10 animals including HF calve (n=1), FS bull (n=1), HF (n=6) and FS (n=2) cows were BLAD carrier. The Hardy-Weinberg frequency of the mutant allele in HF and FS population in Pakistan was calculated to 0.01. Thus there is a need of regular screening of the bulls used for artificial insemination to avoid the risk of spreading BLAD in the cattle population of Pakistan.
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