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Radiographic changes in Thoroughbred yearlings in South Africa.
C Furniss1, A Carstens, S S van den Berg
1Department of Companion Animal Clinical Studies, Faculty of Veterinary Science, University of Pretoria, Private Bag X04, Onderstepoort, 0110 South Africa. cknox@seaworld.org.za
Journal of the South African Veterinary Association
|May 24, 2012
Summary
This study evaluated pre-purchase radiographs of South African Thoroughbred yearlings, finding lower prevalence for many common radiographic changes compared to international data. Further research into management, nutrition, and genetics is recommended.
Area of Science:
- Veterinary Radiology
- Equine Orthopedics
- Thoroughbred Breeding
Background:
- Pre-purchase radiographic evaluations are crucial for assessing the skeletal health of young Thoroughbred horses.
- International studies provide benchmarks for common radiographic findings in Thoroughbred yearlings.
- Variations in radiographic findings may be influenced by regional management, nutritional, and genetic factors.
Purpose of the Study:
- To evaluate radiographic findings in South African Thoroughbred yearlings.
- To compare the prevalence of specific radiographic abnormalities with international studies.
- To identify potential differences in skeletal development and health in this population.
Main Methods:
- Retrospective analysis of pre-purchase radiographic studies of Thoroughbred yearlings.
- Recording and comparison of radiographic changes against established international data.
- Statistical analysis to determine the prevalence of various skeletal lesions.
Main Results:
- Lower prevalence of pedal osteitis, dorsal osteochondral fragmentation of the metatarsophalangeal joint, distal metacarpal sagittal ridge changes, ulnar carpal bone lucencies, carpal osteophytes, distal intertarsal/tarsometatarsal joint changes, tarsal osteochondrosis, and stifle osteochondrosis.
- Similar prevalence of dorsal osteochondral fragments in the metacarpophalangeal joint.
- Higher prevalence of vascular channels, irregular borders, and lucencies in proximal sesamoid bones; higher prevalence of palmar/plantar metacarpophalangeal osteochondral fragments.
- Absence of palmar metacarpal disease, metacarpal supracondylar lysis, proximal sesamoid bone fractures, and carpal osteochondral fragmentation.
- Identification of proximal interphalangeal joint hyperextension and specific solar angles, plus prevalence of carpal bones 1 and 5.
Conclusions:
- South African Thoroughbred yearlings exhibit a distinct radiographic profile with generally lower prevalence of several common skeletal abnormalities compared to international cohorts.
- The higher prevalence of certain proximal sesamoid bone and palmar/plantar metacarpophalangeal findings warrants attention.
- Investigating management, nutrition, and genetics is essential to understand these observed differences.
