Abstract
The aim of this study was to evaluate the activity of butyrylcholinesterase (BChE) in dairy cows naturally infected by Dictyocaulus viviparus and treated with eprinomectin. Among 22 serum samples, 10 were of animals with mild clinical disease and 12 with severe clinical disease. The samples were collect on days 0 (day of diagnosis) and 10 post-treatment (a single dose of eprinomectin [360 μg/kg, topically]). We evaluated the activity of BChE, alanine aminotransferase (ALT), aminotransferase andaspartate (AST), and gamma-glutamyl transferase (GGT) in serum. There was no significant difference between groups with different degrees of clinical disease (mild and severe) for the activity of BChE (p > 0.05). However, when considering the treatment (before and after), a significant difference was identified in the activity of BChE (p 0.05), was found. Based on these results, we can conclude that the treatment D. viviparus leads to a decrease of BChE activity, probably due to decrease in the inflammatory response in response to clinical improvement.
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