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In this report we demonstrate a simple, effective and reliable diagnostic test of BLAD carrier detection based on specific PCR amplification of a 367 bp CD18 gene fragment and RFLP analysis using Taq I restriction enzyme. In a non-random population of 220 animals we found 48 BLAD carriers. Within the amplified PCR fragment an unknown intron sequence of 159 bp was identified.
Bovine leukocyte adhesion deficiency (BLAD) is a well characterised lethal autosomal recessive disease that occurs in Holstein cattle. The discovery of this genetic disorder in 1990 by KEHRLI et al. was serendipitous and occurred in conjunction with studies of new methods to prevent mastitis in periparturient dairy cows ( KEHRLI et al. 1992a). In this review article we are attempting to summarise...
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