Skin: pododermatitis and furunculosis in Dogs (Canis) | Vetlexicon
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Skin: pododermatitis and furunculosis

ISSN 2398-2942

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Synonym(s): Pedal folliculitis and furunculosis, Interdigital pyoderma, Interdigital 'cyst'

Introduction

  • Often referred to as 'interdigital cysts' but are actually interdigital pyoderma NOT cysts.
  • CauseStaphylococcus intermedius may be secondary to immunosuppression.
  • Signs: pyoderma frequently affects feet and may be only body area involved.
  • Nodules with or without fistulous tracts result.
  • Diagnosis: diagnosis may be difficult because pyoderma commonly complicates most other causes of digital and interdigital inflammatory disease.
  • Treatment: systemic antibiotics, topical antimicrobials, clipping.
  • Prognosis: guarded. Relapses are frequent.

Presenting signs

  • Acute: feet swollen, painful, purulent discharge, paronychia.
  • Chronic: nodules, ulceration, fistulae and furunculosis.
  • Lesions are usually multifocal.
  • Alopecia, pruritus and pain may be seen.
  • Scarring occurs with chronicity.

Pathogenesis

Etiology

Predisposing factors

General

  • Trauma.
  • Foreign bodies.
  • Parasites.
  • Contact with irritant chemicals.
  • Anatomic factors.
  • Endocrine disorders.

Specific

  • Tight interdigital spaces may encourage heat and moisture retention → bacterial overgrowth.

Pathophysiology

  • Predisposing factor → entry of Staphylococcus intermedius → deep pyoderma.
  • Rupture of hair follicles → release of keratin and hair shafts into dermis → foreign body reaction.

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.
  • Manning T O et al (1983) Cutaneous diseases of the paw. Clin Dermatol (1), 131-142 PubMed.