Equus caballus papillomavirus 8 (EcPV8) associated with multiple viral plaques, viral papillomas, and squamous cell carcinoma in a horse.

The paper describes a unique case of infection by the Equus caballus papillomavirus 8 (EcPV8) in a horse, which resulted in multiple viral plaques, papillomas, and squamous cell carcinoma (SCC) – a type of skin cancer.

Objective of the Study

The research aimed to document a peculiar case of a horse showing multiple symptoms associated with an infection of the recently identified Equus caballus papillomavirus 8 (EcPV8).

• This includes multiple viral plaques and papillomas, in addition to squamous cell carcinoma.

Research Methodology

This research consisted of a detailed study of a clinical case.

• A 16-year-old mixed breed horse with numerous elevated lesions over a period of four years was examined.
• The horse had undergone surgical removal of the masses four times, and had been treated with cisplatin beads and emulsion in three separate instances.
• Despite these measures, new masses continued to develop in previously affected and new areas.

Research Findings

Post investigation, the researchers found a few significant findings.

• Multiple viral plaques, papillomas, in addition to SCC and invasive squamous cell carcinoma (ISCC) were diagnosed.
• The afflictions were localized to the horse’s inguinal (groin) region.
• The detected disease-causing agent was EcPV8, identified through PCR testing.

Research Conclusions

The study ends with very important conclusions.

• Given only a few cases have been studied, it remains unclear how frequent EcPV8 occurrences are, or how often it may cause SCC or ISCC.
• This was the fourth reported case of viral papillomatosis associated with an EcPV8 infection in a horse.
• Importantly, this is the first reported instance where SCC has been associated with an EcPV8 infection.