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Molluscum contagiosum in a horse
I B Van Rensburg1, M G Collett, N Ronen
1Department of Pathology, Faculty of Veterinary Science, University of Pretoria, Onderstepoort, Republic of South Africa.
Journal of the South African Veterinary Association
|June 1, 1991
Summary
This study reports the first case of molluscum contagiosum in a horse in South Africa. The equine dermatitis was characterized by papules and scrotal edema, confirmed by histopathology and electron microscopy.
Area of Science:
- Veterinary Dermatology
- Equine Pathology
- Viral Infections
Background:
- Molluscum contagiosum, a human poxvirus, rarely affects animals.
- Equine dermatitis can have various etiologies, requiring accurate diagnosis.
Observation:
- An adult stallion presented with severe papular dermatitis on the neck, chest, and genitalia, accompanied by significant scrotal edema.
- Skin biopsies revealed intracytoplasmic molluscum bodies and focal epidermal hyperplasia.
- Electron microscopy confirmed the presence of pox virions within affected epidermal cells.
Findings:
- The observed lesions and cellular changes are consistent with molluscum contagiosum infection.
- Viral isolation attempts were unsuccessful, complicating definitive etiological confirmation.
- This represents the first documented instance of molluscum contagiosum in a horse within the Republic of South Africa.
Implications:
- This case expands the known host range of molluscum contagiosum.
- Highlights the importance of considering viral etiologies in equine skin diseases.
- Further research may be needed to understand transmission and pathogenesis in equids.