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Cutaneous protothecosis in a dog

P J Ginel1, J Pérez, J M Molleda

  • 1Department of Veterinary Clinical Pathology, Faculty of Veterinary Medicine, University of Córdoba, Spain.

The Veterinary Record
|June 21, 1997
PubMed
Summary
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A dog with Prototheca wickerhamii infection developed skin lesions and serous rhinitis. Treatment with ketoconazole resolved most signs, but surgical removal of a scrotal granuloma was needed, with recurrence after five months.

Area of Science:

  • Veterinary Medicine
  • Mycology
  • Infectious Diseases

Background:

  • Prototheca wickerhamii is an alga that can cause infections in animals.
  • Cutaneous protothecosis is a rare manifestation of this infection.

Observation:

  • A dog presented with non-pruritic scrotal swelling, ulceration, cutaneous nodules, trunk lesions, and serous rhinitis.
  • Diagnosis was confirmed via skin biopsy and Prototheca wickerhamii culture.
  • Microscopic examination showed pyogranulomatous dermatitis with organisms in phagocytic cells.

Findings:

  • Systemic Prototheca wickerhamii infection manifested primarily as cutaneous lesions in the dog.
  • Oral ketoconazole treatment for six months led to partial resolution of clinical signs.
  • Surgical excision of the persistent scrotal granuloma was required.

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Implications:

  • This case highlights the varied clinical presentations of Prototheca wickerhamii infections in dogs.
  • Recurrence of protothecosis after initial treatment necessitates ongoing monitoring.
  • Further research into effective and long-term treatment strategies for canine protothecosis is warranted.