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Type of publication: Diploma Thesis
Type of document:

Year: 2011

Authors: Gschaider, Sophie

Title: Vorkommen von lumbosakralen Übergangswirbeln bei Deutsch Drahthaar, Deutsch Kurzhaar, Deutsch Langhaar, Deutschen Wachtelhunden, Irish Settern, English Settern, Gordon Settern, Magyar Vizslas, Großen und Kleinen Münsterländern sowie Weimaranern im Rahmen der routinemäßigen HD-Untersuchung zur Zuchtzulassung.

Other title: Evaluation of Iumbosacral transitional vertebrae in German Wirehaired, Shorthaired and Longhaired Pointers, the German Wachtelhund, Irish, English and Gordon Setters, Hungarian Viszlas, Large and Small Munsterlanders and Weimaraner dogs in the course of r

Source: Diplomarbeit, Vet. Med. Univ. Wien, pp. 69.


Advisor(s):

Gumpenberger Michaela

Reviewer(s):
Künzel Wolfgang

Vetmed Research Units:
University Clinic for Small Animals, Clinical Unit of Diagnostic Imaging


Graduation date: 06.02.12


Abstract:
Lumbosacral transitional vertebrae (LTV) are a congenital anomaly of the spine, which occur between the lumbar and the sacral segment of the vertebral column. Previous studies found prevalence between 0% and 28.96% for their occurrence in different dog breeds. In this study 1160 radiographs from hip dysplasia screening were examined for LTV. Breeds included were German Wirehaired (312), Shorthaired (283) and Longhaired Pointer (9), German Wachtelhund (86), English (6), Gordon (12) and Irish Setter (51), Large (77) and Small Munsterlander (145) as well as Hungarian Vizsla (98) and Weimaraner (81). We found a LTV in 12.8% of the dogs examined. Their prevalence turned out to be significantly higher in Large Munsterlander dogs and significantly lower in Weimaraner dogs. LTV were divided into three different types: An isolated spinous process of the first sacral vertebra was classified as type 1, a symmetric LTV was named type 2, whereas an asymmetric LTV represented type 3. 9.2% out of 12.8% of the dogs were presented with type 1, which seems to be of no clinical relevance to the dogs. 2.1% of the dogs had a LTV type 2 and 1.6% had a LTV type 3. LTV type 2 and type 3 are important risk factors for the occurrence of the Cauda Equina Syndrome. It has been reported that asymmetric LTV may also cause differences in the severity of hip dysplasia between the right and the left hip joint. In our study a relationship between the occurrence of a LTV and the severity of hip dysplasia was not found. 15 out of 18 dogs presented with a LTV type 3 were not affected by hip dysplasia (HD A or HD B). Only three dogs showed minor signs of hip dysplasia. 61.1% of the dogs presented with a LTV type 3 did not show differences between the left and the right hip joint. 33.3% showed more severe signs on the hip joint where the contact between LTV and the ilium was larger. Only 5.6% showed more severe signs on the opposite site. As expected, a sex or age predisposition for LTV was not found. Heritability could not be tested in this study, but in German Shepherd dogs it turned out to be approximately as high as the heritability of hip dysplasia. We assume that LTV are a heritable trait in the breeds of this study as well. As only 3.7% of the dogs in the present study were affected by a LTV type 2 or type 3, it should be considered not to use these dogs as working dogs and especially not for breeding.


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