First genetic characterization of equine adenovirus type 1 (EAdV-1) in Turkey.

This research aimed to explore the presence and characteristics of equine adenovirus type 1 (EAdV-1), a respiratory infection among horses, in Turkey. The study revealed a low prevalence rate of the virus and showed that the Turkish strain is closely related to certain other strains but differs enough to form a unique cluster.

Research Context

• The focus of the study was equine adenovirus type 1 (EAdV-1), a virus known to cause respiratory tract infections in equids, such as horses, donkeys, and mules.
• Despite its impact on animal health, the virus hadn’t been previously studied in the context of Turkey.

Methodology

• Researchers collected nasal swab samples from horses exhibiting respiratory symptoms. They used polymerase chain reaction (PCR), a commonly employed technique for amplifying small samples of DNA, to test these samples for the presence of EAdV-1.
• They performed a molecular characterization of the hexon gene, a crucial viral gene in the adenovirus, in any detected Turkish strain (TR-EAdV-1).

Findings

• The researchers found that the prevalence of EAdV-1 among the tested horses was low, with a rate of 1.4%.
• The study’s phylogenetic analysis, which infers the evolutionary relationships between different strains, showed that the Turkish strain of this virus clusters separately from others. This means it shared a unique evolutionary path.
• Though the Turkish strain was closely related to CAV-1, CAV-2 and bat adenovirus reference strains, it maintained its distinctness.

Implications and Future Research

• This research represents the first of its kind in Turkey, thus establishing a baseline understanding of EAdV-1 in the country.
• Though the study found a low prevalence of EAdV-1, it’s crucial to continue monitoring this, as the virus can have significant implications for equid health.
• Despite the detailed examination of the Turkish strain, larger-scale studies are required to fully understand EAdV-1’s molecular epidemiology and population structure within Turkey.