Exotis ISSN 2398-2985

Guinea Pigs

Acariasis

Synonym(s): Mites, Sarcoptic mange, Sarcoptiform mange

Contributor(s): Cathy Johnson-Delaney, Vicki Baldrey

Introduction

  • Cause: Trixacarus caviae, Chirodiscoides caviae.
  • Signs: alopecia, crusting, pruritus.
  • Diagnosis: skin scraping, but may miss Trixacarus; Chirodiscoides usually detected readily. Deep scraping or biopsy sometimes needed for Trixacarus.
  • Treatment: ivermectin, selamectin, pyrethroid flea powder dusts. In the past, lime sulfur dips have been used.
  • Prognosis: good if treated.
Print off the Owner factsheets on Alopecia, Giving your guinea pig a health check, Parasitic skin diseases and Skin problems to give to your clients.

Pathogenesis

Etiology

  • Trixacarus caviae - a burrowing, sarcoptic mange mite.
  • Chirodiscoides caviae - a fur mite.

Predisposing factors

General

  • Contact with infected guinea pigs, bedding, or hair and debris.

Specific

  • Stress and crowding.

Pathophysiology

  • Trixacarus burrows into the epidermis causing inflammation.
  • Chirodiscoides remains primarily on the hair and surface of the skin.

Timecourse

  • Trixacarus: maximum parasite load may be reached within a month after infestation, then even if untreated numbers may slowly decrease.

Epidemiology

  • Transmission is by direct contact with an infested guinea pig, infested bedding, hair, debris.

Diagnosis

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Treatment

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Prevention

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Outcomes

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Further Reading

Publications

Refereed papers

  • Recent references from PubMed and VetMedResource.
  • Eshar D & Bdolah-Abram T (2012) Comparison of efficacy, safety, and convenience of selamectin versus ivermectin for treatment of Trixacarus caviae mange in pet guinea pigs (Cavia porcellus). JAVMA 241 (8), 1056-1058 PubMed.

Other sources of information

  • Harkness J E, Turner P V, VandeWoude S & Wheler C L (2010) Harkness and Wagner's Biology and Medicine of Rabbits and Rodents. 5th edn. Wiley-Blackwell. pp 254-255.
  • Hrapkiewicz K & Medina L (2007) Clinical Laboratory Animal Medicine an Introduction. 3rd edn. Blackwell Publishing. pp 170-171.


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