Evaluation of the antiviral activities of Bacharis dracunculifolia and quercetin on Equid herpesvirus 1 in a murine model.

The study examines and evaluates the potential antiviral benefits of the plant Bacharis dracunculifolia and the compound quercetin on controlling an equine herpesvirus 1 (EHV-1) infection in a mouse model. It suggests these substances could be promising therapeutic agents for treating EHV-1 infection, although they show limited prophylactic utility.

Study Design

• The research revolved around Equid herpesvirus 1 (EHV-1), a pathogen impacting the equine breeding industry worldwide by causing respiratory, neurological, and reproductive disease.
• To study the possible therapeutic options for this disease, the study tested the potential antiviral benefits of quercetin—a flavonoid found in many plants—and ethanolic extracts of Bacharis dracunculifolia, a plant native to South America.
• The comparison control used was Penciclovir®, a known antiviral medication.
• The study was performed on six to seven-week-old female C57BL/6 mice, arranged into fifteen groups of six.
• Three distinct experiments were performed—Ex-1 to assess post-viral challenge morbidity, mortality, and weight variation; Ex-2 to evaluate lesions five days post-challenge; and Ex-3 to discern any effects of pre-viral challenge treatment on morbidity, mortality, and weight variation.

Results

• Both Quercetin and B. dracunculifolia extract showed a reduction in morbidity and mortality rates when administered after a viral challenge (Ex-1).
• They were also effective in decreasing the severity of EHV-1-related lesions during post-challenge treatment (Ex-2).
• However, the study reported no significant prevention benefits when the substances were used prior to a viral challenge (Ex-3).

Conclusion

• The research concludes that both B. dracunculifolia extract and quercetin have the potential to be developed as antiviral agents for the treatment of EHV-1 infection.
• The results obtained from this study bring hope for the equine industry as they may lead to effective treatment options for diseases caused by EHV-1. The therapeutic potential of these natural compounds against viral infections needs to be further researched to fully understand their mechanism of action and to validate these encouraging results.