ISSN 2398-2969      

Skin: deep pyoderma

icanis

Introduction

  • May be life-endangering dermatoses.
  • Cause: predisposed by demodicosis, hypothyroidism, hyperadrenocorticism Hyperadrenocorticism, trauma or immunosuppression, eg neoplasia or internal disease, may be idiopathic (especially German Shepherd pyoderma).
  • Signs: papules, pustules, furuncles, discharging sinuses; bacterial infection of dermal and subcuticular tissues.
  • Diagnosis: history, clinical signs, microscopy, histopathology, bacteriology.
  • Treatment: antimicrobial/antibiotic therapy.
  • Prognosis: varied according to bacterial infection.

Pathogenesis

Predisposing factors

General

Generalized deep pyoderma

Interdigital pyoderma

Muzzle and chin pyoderma

Pressure point pyoderma

Anal furunculosis

Nasal pyoderma

  • Idiopathic.
  • May not be a form of pyoderma.

Pathophysiology

  • Superficial pyoderma → deeper into follicles → rupture of follicular wall → pyogranulomatous perifolliculitis or furunculosis in dermis and subcutis → extension along tissue planes → fistulae on surface or cellulitis and panniculitis in subcutaneous and fatty tissues.
  • Combined infection and foreign body reactions.
  • Anatomic predisposition - short-coated breeds, eg bull dogs are at higher risk for interdigital pyoderma.

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.
  • Carlotti D N, Guaguere E, Pin D, Jasmin P, Thomas E & Guiral V (1999) Therapy of difficult cases of canine pyoderma with marbofloxacin - a report of 39 dogs. JSAP 40 (6), 265-270 PubMed.
  • Scott D W et al (1998) Efficacy of clindamycin hydrochloride capsules for the treatment of deep pyoderma due to Staphylococcus intermedius infection in dogs. Can Vet J 39 (12), 753-756 PubMed.
  • Hill P B & Moriello K A (1994) Canine pyoderma. JAVMA 204 (3), 334-340 PubMed.
  • Mason I (1993) Selection and use of antibacterial agents in canine pyoderma. In Practice 15 (3), 129-134 VetMedResource.
  • DeManuelle T C et al (1985) Determination of skin concentrations of enrofloxacin in dogs with pyoderma. Am J Vet Res 59 (12), 1599-1604 PubMed.
  • Thoday K L (1980) Canine pruritus; an approach to diagnosis - Stage II - Infestations and infections. JSAP 21 (8), 449-458 PubMed.

Other sources of information

  • Miller W H, Griffin C E & Campbell K L (2013) Small Animal Dermatology. Philadelphia, W B Saunders. pp 198-206. ISBN 978-1-4160-0028-0 (the standard dermatology text).

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OWNER FACTSHEETS

Skin fold pyoderma

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