Investigation and treatment of ovine psoroptic otoacariasis. Issue 3 (June 2016)

• Record Type: Journal Article
• Authors: Crilly, James Patrick; Nunn, Francesca; Busin, Valentina; Marr, Edward J.; Jennings, Amy E.; Burgess, Stewart T. G.; Sargison, Neil D.
• Is Part Of: Veterinary dermatology. Volume 27:Issue 3(2016:Jun.)
• Page Start: 206
• Page End: e52
• Publication Date: 2016-06
• Subjects: Veterinary dermatology -- Periodicals; Pet medicine -- Periodicals; 636.08965
• DOI: 10.1111/vde.12314
• Languages: English
• ISSNs: 0959-4493

Abstract

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. 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.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.