Investigation and treatment of ovine psoroptic otoacariasis

Crilly, J. P., Nunn, F., Busin, V., Marr, E. J., Jennings, A. E., Burgess, S. T. G. and Sargison, N. D. (2016) Investigation and treatment of ovine psoroptic otoacariasis. Veterinary Dermatology, 27(3), 206-e52. (doi:10.1111/vde.12314) (PMID:27188771)

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Background: Psoroptic otoacariasis has been described worldwide and is caused by a mite morphologically indistinguishable from the sheep scab mite Psoroptes ovis. A single treatment of affected sheep with 200 μg/kg of injectable ivermectin is reported to be curative. Case report: Psoroptes mites were isolated following treatment with ivermectin, but treatment with moxidectin at 1 mg/kg caused complete cessation of clinical signs. Affected animals were seropositive to Pso o 2 antigen enzyme-linked immunosorbent assay (ELISA) and had serum haptoglobin concentrations that overlapped with those described for field infections of classical sheep scab. Conclusions and clinical importance: Psoroptic otoacariasis is not controlled by single treatments of injectable ivermectin but resolves after a single treatment with injectable moxidectin. Pso o 2 ELISA can detect infection with Psoroptes spp. mites but cannot distinguish between sheep scab and psoroptic otoacariasis.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Busin, Valentina
Authors: Crilly, J. P., Nunn, F., Busin, V., Marr, E. J., Jennings, A. E., Burgess, S. T. G., and Sargison, N. D.
College/School:College of Medical Veterinary and Life Sciences > School of Veterinary Medicine
Journal Name:Veterinary Dermatology
ISSN (Online):1365-3164
Published Online:18 May 2016

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