Prevalence of equine hepacivirus infection in Mongolia.

The research paper presents a study on the frequency of Equine Hepacivirus (EHV) infections in horses in Mongolia and reveals that about 40% of the horse population is infected, with a high persistence rate. No human infections were detected in the study.

Introduction

• The paper focuses on the Equine Hepacivirus (EHV), a virus related to Hepatitis C Virus (HCV) and commonly infects horses.
• While the virus has been reported from various countries, its prevalence in Mongolia, a region with a large horse population, was unknown.

Methodology

• Serum samples were collected from horses in six different areas across Mongolia to study the infection status.
• They also examined the possibility of this virus infecting humans by testing human serum samples.

Results

• The results showed that the infection rate amongst horses is about 40% in all the regions studied.
• However, they found no evidence of EHV infection in humans.
• A mutation characteristic of the Mongolian EHV strain was found in the 5′-untranslated region of the viral genome sequence.
• Phylogenetic trees were formed for core, NS3, and NS5B sequences, and the results indicated the formation of two clusters depending on the geographic location of the samples.
• The same results were confirmed through the analysis of the full genome sequence.
• The genetic diversity calculations, performed using the full genome, indicated that EHV could be divided into two subgenotypes.

Further Studies

• To study infection persistence, blood samples were recollected from the horses after a 7-month interval.
• Astonishingly, 17 out of the 19 horses retested showed positive results for EHV, suggesting a high rate of persistent infection.

Conclusion

• The findings of the study show a significantly higher frequency of EHV infection in Mongolia compared to Europe or North America and that the viral strains in this region can be divided into at least two sub-genotypes.