Molluscum contagiosum in a horse.

This study examined an adult stallion that exhibited severe skin issues, particularly in the neck, chest, and genital areas. After examination and testing, these symptoms were found to be due to molluscum contagiosum, a condition caused by a pox virus, marking the first time this disease has been reported in a horse in South Africa.

Introduction and Background

• The study focused on an adult stallion (male horse) that showed a severe form of papular dermatitis, a skin condition characterized by raised bumps or papules.
• Areas particularly affected included the neck, chest, and genitalia. The horse also exhibited a notable swelling of the scrotum (scrotal oedema).

Methods and Findings

• Through histopathological examination of skin biopsies, the researchers found the presence of molluscum bodies within animal’s cell (intracytoplasmic).
• These bodies are a signature sign of a viral infection known as molluscum contagiosum. This condition is caused by the molluscum contagiosum virus, a member of the poxvirus family.
• By using electron microscopy, they further investigated the affected cells and observed the presence of pox virions, the virus particles capable of infecting other organisms.
• Despite these findings, their attempts to culture or isolate the virus from the samples was unsuccessful.

Conclusion

• This case is reportedly the first instance of molluscum contagiosum in a horse in the Republic of South Africa.
• The discovery implicates the presence of this viral disease in the horse population in South Africa, which calls for further studies to better understand its implications and how it may be managed.