ISSN 2398-2977      

Sarcoptic mange

pequis

Introduction

  • Rare pruritic condition.
  • Cause:Sarcoptes scabiei  Sarcoptes scabiei  .
  • Signs: alopecia, hyperkeratosis and intense pruritus.
  • Diagnosis: identification of mite in skin scrapings or response to therapy.
  • Treatment: topical parasiticides approved for use in horses.
  • Prognosis: can be refractory to treatment.

Pathogenesis

Etiology

Predisposing factors

General
  • Debility - immune compromise.

Pathophysiology

  • Mite burrows into epidermis   →   lays eggs   →   epidermal damage   →   exudation and excoriation.
  • Mites burrow into epidermis and lay eggs   →   hypersensitivity reaction to mite and its products, intense pruritus   →   serous exudation, papules, wheals, skin thickened and edematous   →   progressive emaciation and possible death from exhaustion and protein/serum loss from exudative dermatitis.

Timecourse

  • Life cycle 21 days.

Epidemiology

  • Burrowing female creates tunnel in epidermis and feeds on serum exuding from damaged tissues.
  • Eggs laid in epidermis, larvae hatch in 3-5 days and crawl onto skin surface.
  • Larvae burrow into epidermis   →   'moulting pockets'.
  • Transmission is by direct contact.

Diagnosis

This article is available in full to registered subscribers

Sign up now to obtain ten tokens to view any ten Vetlexicon articles, images, sounds or videos, or Login

Treatment

This article is available in full to registered subscribers

Sign up now to obtain ten tokens to view any ten Vetlexicon articles, images, sounds or videos, or Login

Prevention

This article is available in full to registered subscribers

Sign up now to obtain ten tokens to view any ten Vetlexicon articles, images, sounds or videos, or Login

Outcomes

This article is available in full to registered subscribers

Sign up now to obtain ten tokens to view any ten Vetlexicon articles, images, sounds or videos, or Login

Further Reading

Publications

Refereed papers

  • Recent references from PubMed and VetMedResource.
  • Littlewood J D (2011) Equine sarcoptic mange: Re-emergence of a previously notifiable disease? Equine Vet Educ 23 (1), 24-26 Wiley Online Library.
  • George J B et al (1992) Louse and mite infestation in domestic animals in northern Nigeria. Trop Anim Health Prod 24 (2), 121-124 PubMed.
  • Morner T (1992) Sarcoptic mange in Swedish wildlife. Rev Sci Tech 11 (4), 1115-1121 (Review) PubMed.

Can’t find what you’re looking for?

We have an ever growing content library on Vetlexicon so if you ever find we haven't covered something that you need please fill in the form below and let us know!