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Putative Malassezia dermatitis in six goats.

Yuko Eguchi-Coe1, Beth A Valentine, Elena Gorman

  • 1College of Veterinary Medicine, Oregon State University, 24326 Old Peak Road, Philomath, OR 97370, USA.

Veterinary Dermatology
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Summary

Histopathology identified Malassezia dermatitis in six goats, presenting with varied seborrhoea and alopecia. Diagnosis is best achieved through skin biopsies or cytological examination for Malassezia yeasts.

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Area of Science:

  • Veterinary Dermatology
  • Mycology
  • Pathology

Background:

  • Malassezia yeasts are known causes of dermatitis in various animal species.
  • Information on Malassezia dermatitis in goats is limited.
  • Histopathology is a key diagnostic tool in veterinary dermatology.

Purpose of the Study:

  • To identify and characterize Malassezia dermatitis in goats using histopathological examination.
  • To correlate clinical findings with histopathological results.
  • To suggest optimal diagnostic methods for Malassezia dermatitis in goats.

Main Methods:

  • Archival search of histopathology files for goat skin submissions.
  • Microscopic examination of skin biopsy specimens for Malassezia spp.
  • Clinical data review including signalment, lesions, and treatment outcomes.

Main Results:

  • Six of 28 goats with dermatological disease showed histopathological evidence of Malassezia dermatitis.
  • Clinical signs included alopecia, dry seborrhoea, and greasy seborrhoea.
  • Histopathology revealed severe orthokeratotic hyperkeratosis and numerous yeasts in the stratum corneum.
  • Concurrent bacterial infections were present in three cases.
  • Topical antifungal therapy led to resolution in treated cases.

Conclusions:

  • Malassezia dermatitis can occur in goats, presenting with diverse clinical signs.
  • Histopathological examination is crucial for diagnosing Malassezia dermatitis in goats.
  • Cytological examination of skin impressions or biopsy samples is recommended for diagnosis.