Equis ISSN 2398-2977

Dermatitis: viral papular dermatitis

Synonym(s): Uasin Gishu disease, Molluscum contagiosum

Contributor(s): Rosanna Marsella, Reginald Pascoe, Sue Paterson

Introduction

  • Viral papular dermatitisis an infectious skin disease.
  • Molluscum contagiosumis a rare and mildly contagious skin disease, which although it differs slightly clinically from viral papular dermatitis, has identical histopathology and is considered by some to be the same disease (Moens and Kombe, 1988).
  • Cause: an unidentified pox virus.
  • Signs: papular lesions with hair loss primarily over the trunk seen in viral papular dermatitis; papular lesions primarily over hairless areas in molluscum contagiosum   Dermatitis: molluscum contagiosum 01  .
  • Diagnosis: characteristic histopathology and virus isolation.
  • Treatment: no specific treatment is needed.
  • Prognosis: lesions spontaneously resolve after 4-6 weeks (up to 2-3 years for resolution in molluscum contagiosum).

Pathogenesis

Etiology

  • Unspecified pox virus.
  • Morphologically identical virions have been identified in both diseases.

Timecourse

Viral papular dermatitis
  • 7 day incubation and resolution within 4-6 weeks.

Molluscum contagiosum

  • Remission has been reported to take up to 2-3 years.

Epidemiology

  • Spread is by direct contact or indirectly by vectors, eg flies.

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.
  • Fox R, Thiemann Aet al(2012)Molluscum contagiosum in two donkeys.Vet Rec170(25), 649 PubMed.
  • Mathison P T (1995)Eosinophilic nodular dermatoses.Vet Clin North Am Equine Pract11(1), 75-89 PubMed.
  • Fadok V A (1995)Overview of equine papular and nodular dermatoses.Vet Clin North Am Equine Pract11(1), 61-74 PubMed.
  • Van Rosenburg J Bet al(1991)Molluscum contagiosum in a horse.J South Afr Vet Assoc62(2), 72-74 PubMed.
  • Rothwell T Let al(1991)Unilateral papular dermatitis in a horse.Aust Vet J68(3), 122-123 PubMed.
  • Moens Y & Kombe A H (1988)Molluscum contagiosum in a horse.Equine Vet J20(2), 143-145.(A thorough clinical description of a case of molluscum contagiosum in a horse and a comparison with other pox virus infections) PubMed.


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