Cheyletiellosis

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Sections available in full article Introduction, Presenting signs, Age predisposition, Pathogenesis, Etiology, Predisposing factors, Pathophysiology, Timecourse (incubation, duration), Epidemiology (population dynamics), Diagnosis, Presenting problems, Client history, Clinical signs, Diagnostic investigation, Differential diagnosis, Treatment, Standard treatment, Subsequent management, Prevention, Control, Sequelae, Prognosis, Reasons for treatment failure, Sources, Publications, Vetstream contributor(s),
Contributors Dr Rosanna Marsella DVM DipACVD
Dr Ian Mason BVetMed PhD CertSAD DipECVD MRCVS
Mr David Scarff BVetMed CertSAD MRCVS
Synonyms Walking dandruff

Introduction

  • Cause : infestation with C. blakei , Cheyletiella yasguri  Cheyletiella yasguri  (dog) or C. parasitivorax (rabbit).
  • Signs : variable, absent to intense pruritus with scaling; in humans erythematous papules, intensely pruritic.
  • Diagnosis : identification of mite or its eggs.
  • Treatment : ectoparasiticides.
  • Prognosis : excellent.
    Print off the owner factsheet on 'Walking dandruff' (Cheyletiellosis)  Walking dandruff (Cheyletiellosis)   to give to your client.

Diagnosis

Clinical signs

  • Small white mites just visible with naked eye  Cheyletiella yasguri: adult 02  .
  • Scaling on dorsum  Cheyletiella yasguri: walking dandruff  ('walking dandruff').
  • Miliary dermatitis  Dermatitis: miliary  (widespread papular eruption).
  • Asymptomatic.

Diagnosis

Differential diagnosis

  • Causes of pruritus and scaling.

Sequelae

Prognosis

  • Excellent.

Reasons for treatment failure

  • Failure to prevent reinfestation.
  • Nasal sequestration has been reported.
  • Standard reasons  Standard reasons for failure in a treatment  .

Sources

Publications

Refereed papers

  • Wagner R & Stallmeister N (2000)Cheyletiella dermatitis in humans, dogs and cats.Br J Dermatol143(5), 1110-1112.
  • Page N, de Jaham C & Paradis M (2000)Observations on topical ivermectin in the treatment of otoacariosis, cheyletiella and toxocariosis in cats.Can Vet J41(10), 773-776.
  • Rivers J K et al (1986)Walking dandruff and Cheyletiella dermatitis.J Am Acad Dermatol15(5-2) 1130-1133.
  • Cohen S R (1980)Cheyletiella dermatitis. A mite infestation of rabbit, cat, dog, and man.Arch Dermatol116(4) 435-437.
  • McKeever P J et al (1979)Dermatitis associated with Cheyletiella infestation in cats.JAVMA174(7) 718-720.
  • Fox J G & Hewes K (1976)Cheyletiella infestation in cats.JAVMA169(3), 332-333.

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