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 Biodiversity, One Health & Veterinary Medicine
Journal Name:Veterinary Dermatology
ISSN (Online):1365-3164
Published Online:18 May 2016

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