Clinical and radiographic features of contagious ovine digital dermatitis and a novel lesion grading system

Angell, JW, Blundell, R, Grove-White, DH ORCID: 0000-0002-5969-5535 and Duncan, JS ORCID: 0000-0002-1370-3085 (2015) Clinical and radiographic features of contagious ovine digital dermatitis and a novel lesion grading system. VETERINARY RECORD, 176 (21). 544-.

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Abstract

Contagious ovine digital dermatitis (CODD) is an infectious foot disease of sheep causing severe lameness. Diagnosis is currently made using broad anecdotal descriptions. The aim of this study was to systematically and formally describe the clinical presentation of the disease in terms of (1) a lesion grading system; (2) associated radiographic changes and (3) severity of associated lameness. A five-point lesion grading system was developed and applied to 908 sheep affected by CODD from six farms. Sheep with lesions typical of each grade were euthanased and their feet radiographed. Radiographic abnormalities including soft tissue and bony changes were evident in feet with lesions graded 2-5. In order to quantify the welfare impact of CODD, all the 908 sheep were locomotion scored. Five hundred and eighty-five (64.5% (95% CI 61.4% to 67.6%)) were lame. The locomotion score for affected sheep increased with worsening pathological changes. Once healing had begun the locomotion score decreased. In conclusion the five-point grading system may be used to clinically describe stages of CODD lesions. The radiographic changes revealed examples of deeper pathological changes and there was a strong association between the lesion grading system and locomotion score in affected sheep.

Item Type:	Article
Uncontrolled Keywords:	Contagious ovine digital dermatitis, Footrot, Sheep, Pathology, Radiography, Lameness
Depositing User:	Symplectic Admin
Date Deposited:	28 Sep 2015 09:28
Last Modified:	16 Dec 2022 16:50
DOI:	10.1136/vr.102978
Related URLs:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/2009925