Cervicothoracic vertebrat subluxation causing ataxia in sheep

Bd, Hill; Nd, O'Dempsey; Ch, Carlisle

doi:10.1111/j.1751-0813.1993.tb06114.x

Cited by 11 publications

(13 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Sectioning of the vertebral column demonstrated the deviation and narrowing of the spinal canal between C7 and T1 (Figure ). The findings were consistent with two previous reports of ovine cervicothoracic vertebral subluxation …”

Section: Case Reportsupporting

confidence: 93%

“…In 2015, the District Veterinarian from the Riverina Local Land Services, New South Wales, reported a disease investigation in a self‐replacing Poll Merino flock in which cervicothoracic vertebral subluxation was also diagnosed. There was a similar history and clinical presentation to the current case and those previously reported . The producer on this property had run the same bloodline of sheep for 30 years, and had noticed a small number (approximately 1% ewe lambs) of affected animals for the past 5 years.…”

Section: Case Reportsupporting

confidence: 80%

“…It also demonstrated the narrowing of the cervicothoracic segment of the spinal canal of the adult sheep (Figure ) and the neonate. The ‘wedging’ deformity of T1 as previously described in other cases of cervicothoracic vertebral subluxation was also present.…”

Section: Case Reportsupporting

confidence: 67%

“…Cervicothoracic vertebral subluxation in sheep is an entity that has been presented in two previous case reports in this journal . Concurrent cervical myopathy was also recognised in one of these .…”

mentioning

confidence: 60%

See 3 more Smart Citations

Suspected hereditary cervicothoracic vertebral subluxation with cervical myopathy in Poll Merino sheep

et al. 2019

View full text Add to dashboard Cite

Background Cervicothoracic vertebral subluxation in sheep presents as a postural and locomotor disorder, and has been described in several breeds in Australia and overseas. Cervical myopathy may also be present in these cases.Case report A New South Wales sheep producer reported a postural and locomotor disorder with a low prevalence in his Poll Merino stud flock, affecting neonate, weaner and adult sheep. Animals with postural abnormalities, variable degrees of ataxia and proprioceptive deficits involving both fore and hind limbs were described. Abnormalities of the cervicothoracic vertebral column were identified grossly during necropsy, with misalignment and consequent narrowing of the posterior cervical spinal canal. Lesions ranging from pallor (cellular degeneration) to white streaky lesions with pinpoint haemorrhage (necrosis) were identified in the cervicothoracic paravertebral musculature of affected animals. Boney abnormalities were further characterised by imaging studies. Pedigree analysis of the very extensive breeding and disease incident records available for this flock suggested that the disease was inherited. A similar case recognised in a separate New South Wales Poll Merino flock is also described.Conclusion This report describes an entity of cervicothoracic vertebral subluxation in two Poll Merino sheep flocks, with cervical myopathy also identified in one, with preliminary evidence in the primary case that there is likely to be a hereditary basis. The two cases outlined in this report resemble the findings of several historical investigations into ovine flock postural disorders in Australia and beyond.

show abstract

Section: Case Reportsupporting

confidence: 93%

Section: Case Reportsupporting

confidence: 80%

Section: Case Reportsupporting

confidence: 67%

mentioning

confidence: 60%

See 2 more Smart Citations

Suspected hereditary cervicothoracic vertebral subluxation with cervical myopathy in Poll Merino sheep

et al. 2019

View full text Add to dashboard Cite

show abstract

“…To the authors' knowledge, there are no reports of the wobbler syndrome in sheep, although there have been various case reports of sheep having clinical signs of cervical spinal cord compression caused by severe anatomical abnormalities of the cervico-thoracic vertebral column. [3][4][5] In farm animal practice, rams occasionally are presented with signs of cervical vertebral injury usually associated with fighting, and these are diagnosed on the basis of history, signs of neck pain, and variable signs relating to cervical spinal cord compression. A case of apparent cervical vertebral stenosis in a Suffolk ram has been described in which the bony compressive lesion could have been attributed to injury from fighting.…”

mentioning

confidence: 99%

Compressive Cervical Myelopathy in Young Texel and Beltex Sheep

Penny¹,

Macrae²,

Hagen³

et al. 2007

J Vet Int Med

View full text Add to dashboard Cite

Background: This investigation was prompted by the referral of increasing numbers of young Texel and Beltex rams with ataxia and weakness, or wobbler syndrome.Hypothesis: The study aims were to describe the clinical and pathologic findings in affected sheep. Animals: The animals evaluated in this study included 7 Texel sheep (6 male and 1 female) and 3 Beltex sheep (2 male and 1 female) referred from pedigree flocks. Typically, the sheep were 15-18 months of age at referral.Methods: Diagnostic investigations included radiographic and computed tomographic (CT) myelography followed by gross postmortem and histopathologic examinations.Results: Clinical findings typical of cervical spinal cord compression were present in all sheep but varied in severity. Myelography confirmed dorsal spinal cord compression in the region of C6-C7. No bony abnormalities were identified as described in cases of canine and equine wobbler syndrome. Postmortem examinations revealed discrete, smooth, nodular to polypoid projections of adipose tissue apparently prolapsing through the dorsolateral intervertebral space at C6-C7 and causing localized spinal cord compression. Histopathology of the nodules confirmed that they were composed of welldifferentiated adipocytes typical of fatty tissue. Spinal cord lesions were similar in all sheep with marked Wallerian degeneration at the site of compression and mild Wallerian degeneration present cranial and caudal to the lesion.Conclusions and Clinical Importance: The findings of this study suggest a novel cervical myelopathy in these sheep breeds caused by the presence of fatty nodules encroaching into the dorsal vertebral canal at C6-C7. Additional investigations are required to establish the etiology and possible hereditary risk factors for this unique clinicopathologic syndrome.

show abstract

Congenital, familial, and genetic disorders

2022

Large Animal Neurology

View full text Add to dashboard Cite

Cervicothoracic vertebrat subluxation causing ataxia in sheep

Cited by 11 publications

References 11 publications

Suspected hereditary cervicothoracic vertebral subluxation with cervical myopathy in Poll Merino sheep

Suspected hereditary cervicothoracic vertebral subluxation with cervical myopathy in Poll Merino sheep

Compressive Cervical Myelopathy in Young Texel and Beltex Sheep

Congenital, familial, and genetic disorders

Contact Info

Product

Resources

About