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Crilly JP, Nunn F, Busin V, et al. Investigation and treatment of ovine psoroptic otoacariasis. Vet Dermatol. 2016;27(3):206-e52doi: 10.1111/vde.12314.
Crilly, J. P., Nunn, F., Busin, V., Marr, E. J., Jennings, A. E., Burgess, S. T., & Sargison, N. D. (2016). Investigation and treatment of ovine psoroptic otoacariasis. Veterinary dermatology, 27(3), 206-e52. https://doi.org/10.1111/vde.12314
Crilly, James Patrick, et al. "Investigation and treatment of ovine psoroptic otoacariasis." Veterinary dermatology vol. 27,3 (2016): 206-e52. doi: https://doi.org/10.1111/vde.12314
Crilly JP, Nunn F, Busin V, Marr EJ, Jennings AE, Burgess ST, Sargison ND. Investigation and treatment of ovine psoroptic otoacariasis. Vet Dermatol. 2016 Jun;27(3):206-e52. doi: 10.1111/vde.12314. PMID: 27188771.
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Vet Dermatol. 2016 Jun;27(3):206-e52. doi: 10.1111/vde.12314.

Investigation and treatment of ovine psoroptic otoacariasis.

Veterinary dermatology

James Patrick Crilly, Francesca Nunn, Valentina Busin, Edward J Marr, Amy E Jennings, Stewart T G Burgess, Neil D Sargison

Affiliations

  1. Royal (Dick) School of Veterinary Studies, University of Edinburgh, Easter Bush, Roslin, Midlothian, EH25 9RG, UK.
  2. Moredun Research Institute, Pentlands Science Park, Bush Loan, Penicuik, Midlothian, EH26 0PZ, UK.

PMID: 27188771 DOI: 10.1111/vde.12314

Abstract

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.

© 2016 ESVD and ACVD.

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