Peer-reviewed veterinary case report
Hip dysplasia found in 66% of Estrela mountain dogs 1991-2005
By Ginja, M M D et al.·Published in Veterinary journal (London, England : 1997)·2009·Department of Veterinary Science-CITAB·View original on PubMed →
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Original publication title: Hip dysplasia in Estrela mountain dogs: prevalence and genetic trends 1991-2005.
- Species:
- dog
Plain-English summary
A study of 313 Estrela mountain dogs found that 66% had hip dysplasia, a condition that affects how the hip joint fits into the socket. The researchers used specific tests to evaluate the severity of the condition and found that both male and female dogs were equally affected. Over the years, there was a slight improvement in the genetic trends for hip dysplasia, likely due to a voluntary screening program for breeders. This suggests that responsible breeding practices could help reduce the prevalence of hip dysplasia in this breed.
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Abstract
Three hundred and thirteen Estrela mountain dogs were examined for hip dysplasia (HD) using the standard ventrodorsal hip extended view, and graded into five categories (A, B, C, D and E) using the Fédération Cynologique Internationale's (FCI) scoring system. The Ortolani method was performed to evaluate hip joint laxity. Pedigree information was obtained from the Portuguese Kennel Club and the genetic trend was evaluated by calculating the mean breeding values (BVs) for the last 15 years, using the threshold model. HD was found in 66% of the dogs. There was low-moderate correlation between the results of the Ortolani test and FCI hip scores (r(s)=0.386; P<0.001). Grades of hip dysplasia were equal in both males and females (P=0.14) and in the animals' right and left sides (P=0.51). The mean BVs for HD were stable in dogs born between 1991 and 2003, and showed an improvement in 2004 and 2005. The data confirm the high prevalence and severity of HD in predisposed breeds that do not have breeding programmes in place. It also confirms an initial favourable change in BVs that is a likely consequence of the voluntary radiographic hip-screening programme.
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Search related cases →Original publication on PubMed: https://pubmed.ncbi.nlm.nih.gov/18722145/