Investigation and treatment of ovine psoroptic otoacariasis

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

doi:10.1111/vde.12314

Investigation and treatment of ovine psoroptic otoacariasis

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

Royal (Dick) School of Veterinary Studies

Research output: Contribution to journal › Article › peer-review

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.

Original language	English
Pages (from-to)	206-e52
Journal	Veterinary Dermatology
Volume	27
Issue number	3
Early online date	18 May 2016
DOIs	https://doi.org/10.1111/vde.12314
Publication status	Published - Jun 2016

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title = "Investigation and treatment of ovine psoroptic otoacariasis",

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.",

author = "Crilly, {James Patrick} and Francesca Nunn and Valentina Busin and Marr, {Edward J} and Jennings, {Amy E} and Burgess, {Stewart T G} and Sargison, {Neil D}",

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doi = "10.1111/vde.12314",

language = "English",

volume = "27",

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T1 - Investigation and treatment of ovine psoroptic otoacariasis

AU - Crilly, James Patrick

AU - Nunn, Francesca

AU - Busin, Valentina

AU - Marr, Edward J

AU - Jennings, Amy E

AU - Burgess, Stewart T G

AU - Sargison, Neil D

PY - 2016/6

Y1 - 2016/6

N2 - 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.

AB - 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.

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DO - 10.1111/vde.12314

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SN - 0959-4493

VL - 27

SP - 206-e52

JO - Veterinary Dermatology

JF - Veterinary Dermatology

IS - 3

ER -

Investigation and treatment of ovine psoroptic otoacariasis

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