Peer-reviewed veterinary case report
Hemophilia A bleeding disorder in Border Collie puppies from gene
By Brockmann, Maria et al.·Published in Veterinary clinical pathology·2023·Laboklin GmbH & Co. KG, Germany·View original on PubMed →
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Original publication title: Hemophilia A in a litter of Border Collies caused by a one base pair deletion in the F8 gene.
- Species:
- dog
Plain-English summary
A litter of Border Collie puppies developed bleeding problems after getting microchipped, with some forming painful hematomas. The veterinarian suspected hemophilia A, a genetic disorder that affects blood clotting, and confirmed a deficiency in factor VIII. Unfortunately, two of the affected male puppies had to be euthanized shortly after. Genetic testing revealed a mutation in the mother that was passed on to her puppies, leading to the decision to remove carriers from future breeding to prevent more cases.
People also search for: Border Collie bleeding problems · hemophilia A in dogs · puppy hematoma treatment
Abstract
In dogs, hemophilia A is known to affect different breeds. This is a case report describing hemophilia A in a litter of Border Collies. A privately owned bitch and her puppies (n = 7) were presented to the referring veterinarian after acute hematoma formation in the male offspring (n = 3) following microchip implantation. Global coagulation testing, as well as determination of factor VIII and IX activity, were carried out. Based on the results, factor VIII deficiency was suspected. Two of the affected male puppies were euthanized within a few days. Genetic testing of the mother and the surviving male puppy resulted in the description of a deletion in exon 14 of the F8 gene. This c.3206delA variant leads to a frameshift in amino acid sequence and a premature stop codon (p.Asn1069IlefsTer7). The detection of the mutation and consequent testing of related dogs revealed that the deletion most likely had occurred spontaneously in the mother and had been transmitted to several of her offspring in different litters. Identified carriers were taken out of the breeding scheme. It is concluded that genetic testing in the context of suspected genetic disease can lead to preventive measures, including timely exclusion of carriers from breeding.
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Search related cases →Original publication on PubMed: https://pubmed.ncbi.nlm.nih.gov/38104983/