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Differences in second-intention wound healing between horses and ponies: histological aspects
J M Wilmink1, P R van Weeren, P W Stolk
1Department of General and Large Animal Surgery, Faculty of Veterinary Medicine, University of Utrecht, The Netherlands.
Equine Veterinary Journal
|February 10, 1999
Summary
Horses exhibit delayed wound healing compared to ponies due to less organized myofibroblasts and less effective acute inflammation. Improving these factors could enhance equine wound healing.
Area of Science:
- Veterinary Medicine
- Comparative Pathology
- Wound Healing Research
Background:
- Second-intention wound healing differs between horses and ponies.
- Histological evaluation is crucial for understanding these differences.
Purpose of the Study:
- To histologically compare second-intention wound healing in horses and ponies.
- To identify factors contributing to observed macroscopical healing differences.
Main Methods:
- Weekly biopsies from standardized wounds in horses and ponies.
- Histological staining for cell counting, DNA synthesis, fibrin, SMA, collagen, and bacteria.
- Analysis of polymorphonuclear leucocytes (PMNs), fibroblasts, myofibroblasts, and mitotic activity.
Main Results:
- Ponies showed higher initial PMN counts and faster resolution than horses.
- Horses had more fibrin and less organized myofibroblasts, especially in metatarsal wounds.
- Granulation tissue mitotic activity was higher in horses' metatarsal wounds.
Conclusions:
- Ponies demonstrate more effective acute inflammation and myofibroblast organization for faster wound healing.
- Targeting myofibroblast organization and inflammatory response could improve equine wound healing outcomes.