Assessment of the short-term systemic effect of and acute phase response to mulesing and other options for controlling breech flystrike in Merino XXXX .

@entity417 @entity41324 @entity742 @entity14942
BACKGROUND: Mulesing is an important method of preventing flystrike of Merino @entity742 in Australia, but because there are important short-term welfare issues associated with mulesing, alternative methods of removing the skin folds for breech flystrike prevention are being investigated. OBJECTIVE: To examine the short-term systemic effects of mulesing and two proposed alternatives, compared with two control methods, for controlling breech flystrike. METHOD: The five treatment groups comprised 10 @entity742 each: (1) mulesing, (2) intradermal- @entity14942 treatment, (3) clip application, (4) tail docking only and (5) no treatment. Changes in body weight, haematological and biochemical profiles, and concentrations of fibrinogen, @entity41324 and serum amyloid A were measured repeatedly for 29 days post treatment. RESULTS: The mulesing and intradermal- @entity14942 groups were the only treatment groups to lose weight during the first week, with greater weight loss in the mulesing group. The mulesing group had the most marked increases in all three acute-phase protein concentrations, closely followed by the intradermal- @entity14942 group, with a mild increase observed for the clip group and even less for the tail-docked group. The mulesing group was the only group to develop mild @entity417 , transient hyperglycaemia and a persistent decreased albumin : globulin ratio. The neutrophil : lymphocyte ratio was above the upper reference limit for both the mulesing and intradermal- @entity14942 groups. CONCLUSION: Mulesing had the greatest systemic effect in terms of the magnitude and duration of increased acute-phase protein concentrations and haematological, biochemical and body weight changes. The clips had a significantly reduced systemic effect compared with mulesing, with the intradermal- @entity14942 treatment in between the two. Tail docking had a minimal systemic effect.
