Infection of young foals with Equine Parvovirus-Hepatitis following a fatal non-biologic case of Theiler’s disease.

The research investigates infection of young horses with Equine Parvovirus-Hepatitis (EqPV-H) following the death of a horse from Theiler’s disease (TD), suggesting that the virus might be transmitted through close contact within the horse population.

Research Overview

• The study was prompted by the death of an adult horse (mare) from Theiler’s disease, a form of acute hepatitis that has recently been associated with EqPV-H.
• The researchers sought to examine if there was any evidence of EqPV-H in other horses that had close contact with the diseased mare. Close-contact horses were both mares and foals who shared the same paddock.

Methodology

• The serum of the close-contact horses was tested 6 and 42 days after the death of the mare for EqPV-H DNA and changes in liver-associated serum biochemical parameters.
• The team analysed levels and patterns of viral presence, as well as differences in the biochemical parameters between the deceased mare and the in-contact horses.

Findings

• Foals demonstrated higher EqPV-H viral loads than the adult horses.
• None of the in-contact horses showed signs of severe disease or displayed significantly elevated liver enzymes.
• No major differences were observed in the EqPV-H DNA sequences between the serum samples of the deceased mare and the in-contact horses.

Conclusion

• The research confirms previous findings suggesting potential horizontal transmission of EqPV-H through close contact among horses.
• The study does not identify an increased disease risk accompanying the higher EqPV-H viral loads in foals, although more research is needed to clarify this aspect.

The study is instrumental in contributing to our understanding of EqPV-H transmission between horses, which could have implications for horse health management.