First detection of the equine herpesvirus 1 neuropathogenic variant in Brazil.

This study reports the first detection of a neuropathogenic variant of equine herpesvirus 1 (EHV-1) in Brazil. The findings will enhance the understanding of the epidemiology of this virus in the country.

Overview of the Research

• The aim of this research was to explore the presence of a strain of equine herpesvirus 1 (EHV-1) in horses in Brazil, specifically a neuropathogenic variant of the virus.
• This was the first time that this variant, named G2254/D752, has been detected in the country.
• The presence of this variant was confirmed in a fatal case of equine herpesvirus myeloencephalopathy (EHM) in a mare.

Methodology and Findings

• Researchers carried out nucleotide sequencing of the EHV-1 ORF30 gene. This gene is an important one to study in genetic sequencing as mutations in it are associated with the neuropathogenicity.
• Through their analysis, the scientists discovered that two other Brazilian EHV-1 isolates from EHM cases were representatives of the non-neuropathogenic variant of the virus (A2254/N752).
• The findings signify that other factors which have not been identified yet could also contribute to the neuropathogenic effects of EHV-1 in horses.

Implications and Significance

• The research contributes to the epidemiological study of EHV-1 infection in Brazil. Understanding how and where these variants circulate can help in adopting measures for control and prevention of the infection.
• Detection of the neuropathogenic variant sets the stage for further research to investigate other factors that might be playing a role in the neuropathogenicity of the virus.
• This information can also aid in developing strategies for monitoring and controlling the spread of EHV-1 infection among horse populations.