Faculty of Veterinary Science, The University of Sydney, New South Wales, Australia
Wound healing after mulesing and other options for controlling breech flystrike in Merino lambs: quantitative and semiquantitative analysis of wound healing and wound bed contraction
Version of Record online: 16 FEB 2011
© 2011 The Authors. Australian Veterinary Journal © 2011 Australian Veterinary Association
Australian Veterinary Journal
Volume 89, Issue 3, pages 61–69, March 2011
How to Cite
Lepherd, M., Canfield, P., Hunt, G., Thomson, P. and Bosward, K. (2011), Wound healing after mulesing and other options for controlling breech flystrike in Merino lambs: quantitative and semiquantitative analysis of wound healing and wound bed contraction. Australian Veterinary Journal, 89: 61–69. doi: 10.1111/j.1751-0813.2010.00670.x
- Issue online: 16 FEB 2011
- Version of Record online: 16 FEB 2011
- (Accepted for publication 23 July 2010)
- breech flystrike;
- non-surgical mulesing;
- wound healing
Background A two-part study examined wound healing and contraction occurring after mulesing and two alternative methods of preventing breech flystrike in sheep.
Objective To quantify wound healing using a scoring system and to assess the contractility of the wound bed of the breech after mulesing, cetrimide-intradermal treatment and application of clips.
Method The study group of 30 mulesed, 30 cetrimide-intradermal treated, 30 control and 10 clip-treated sheep were humanely killed at six time points from 3 to 47 days after each treatment. Wound healing post treatment was assessed using a scoring system, and contractility was assessed by the quantification of myofibroblast expression. Statistical analyses allowed comparisons of temporal wound healing and contraction between treatment groups.
Results Mulesing wounds healed faster in the first 11 days, but by 19 days wound healing was similar between the mulesing and cetrimide-intradermal groups. By 32 days, all three treatment groups had similar wound healing scores. There was greater myofibroblast expression in the mulesing group in the first 11 days after treatment, but by 19 days expression was similar in both the mulesing and cetrimide-intradermal groups. The clip group had significantly less myofibroblast expression from 32 days after treatment.
Conclusion Wound healing is initially most rapid after mulesing, but there are similar wound healing scores in the mulesing and cetrimide-intradermal treatment groups by 19 days. Both mulesing and the cetrimide-intradermal treatment induce a similar amount of wound bed contraction, with less contraction observed after application of clips.