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Developmental orthopaedic disease in limbs of foals: between-breed variations in the prevalence, location and severity at weaning

Published online by Cambridge University Press:  01 February 2008

J. Lepeule ,
N. Bareille ,
J. P. Valette ,
H. Seegers ,
S. Jacquet ,
J. M. Denoix  and
C. Robert
J. Lepeule*
Affiliation:
Animal Health Management Group, Veterinary School, INRA, BP 40706, 44307 Nantes Cedex 03, France Unité Mixte de Recherches 957 Biomécanique et Pathologie Locomotrice du Cheval, Veterinary School, INRA, 7, avenue du Général de Gaulle, 94704 Maisons-Alfort cedex, France
N. Bareille
Affiliation:
Animal Health Management Group, Veterinary School, INRA, BP 40706, 44307 Nantes Cedex 03, France
J. P. Valette
Affiliation:
Unité Mixte de Recherches 957 Biomécanique et Pathologie Locomotrice du Cheval, Veterinary School, INRA, 7, avenue du Général de Gaulle, 94704 Maisons-Alfort cedex, France
H. Seegers
Affiliation:
Animal Health Management Group, Veterinary School, INRA, BP 40706, 44307 Nantes Cedex 03, France
S. Jacquet
Affiliation:
Unité Mixte de Recherches 957 Biomécanique et Pathologie Locomotrice du Cheval, Veterinary School, INRA, 7, avenue du Général de Gaulle, 94704 Maisons-Alfort cedex, France
J. M. Denoix
Affiliation:
Unité Mixte de Recherches 957 Biomécanique et Pathologie Locomotrice du Cheval, Veterinary School, INRA, 7, avenue du Général de Gaulle, 94704 Maisons-Alfort cedex, France
C. Robert
Affiliation:
Unité Mixte de Recherches 957 Biomécanique et Pathologie Locomotrice du Cheval, Veterinary School, INRA, 7, avenue du Général de Gaulle, 94704 Maisons-Alfort cedex, France
*
E-mail: jlepeule@yahoo.fr
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Abstract

Developmental orthopaedic disease (DOD) affects all breeds and is a common cause of pain and lameness for horses in sports. A thorough knowledge of between-breed variations for the prevalence of DOD, for its distribution among the various joints and for its severity at earlier stages in the disease process is needed in order to improve the relevance and the cost-effectiveness of DOD screening protocols. However, no prevalence study for DOD simultaneously performed on several breeds with similar farming systems and based on radiographic findings (RF) on quite a large number of joints and views, has been reported earlier. The objective of this study was to describe variations in the prevalence, location and severity of DOD in foals at weaning among Warmbloods (Wb), Standardbreds (St) and Thoroughbreds (Tb) with similar farming systems. DOD assessment was based on RF on the limb joints. A total of 392 foals from 21 volunteer stud farmers were included. To determine the statuses of foals regarding DOD, they were X-rayed on the front- and hind-limb digit, carpus, hock and stifle joints. X-ray data were analysed by three experienced equine veterinarians who gave a common assessment about the entity and the severity of RF. Between-breed variations were analysed in two steps: the first implemented for each anatomical site; the second considered only foals affected by DOD to explore RF association patterns on the affected sites, at foal level. The three breeds were represented by 25.0% of Wb, 41.1% of St and 33.9% of Tb. DOD was present in 66.3% of the foals (95% confidence interval (CI) = 61.6% to 71.0%). Prevalence of foals affected by DOD and distribution of the RF severity score on the anatomical sites differed depending on the breed: Wb foals seemed to be the most affected by DOD. Cluster analyses showed no clear association among sites. However, Wb and Tb foals were preferentially classified together because they were affected on the same sites, whereas St foals were distributed in other classes. The most severely affected sites were the proximal part of the hock and the femoro-patellar joint for Wb and St foals, and the fore fetlock and the distal part of the hock for Tb foals. This is the first epidemiological study reporting between-breed variations in DOD distribution and severity, for the limb joints of foals. These results contribute to broaden the knowledge on DOD and are of great interest to improve detection of DOD within a particular breed.

Keywords

breedshorsesosteochondrosisprevalenceradiography
Type
Full Paper
Information
animal , Volume 2 , Issue 2 , February 2008 , pp. 284 - 291
Copyright
Copyright © The Animal Consortium 2008

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