Respiratory viruses affecting health and performance in equine athletes.

The research article focuses on how certain respiratory viruses impact the health and performance of equine athletes. It also explores the connection between these viruses, performance, and detection methods; as well as suggesting measures for prevention and control.

Virology, Clinical Manifestations, and Epidemiology

• The paper discusses the impact of various respiratory viruses, most common among performing horses – equine herpesviruses, equine influenza virus, equine rhinitis viruses, equine arteritis virus, and equine adenovirus 1. Each of these viruses has a unique presence and impacts the horses differently.
• It also explains the virology, clinical manifestations, and epidemiology of these viruses, aiming to provide a comprehensive understanding of how they affect equine health and performance.

Pathogenesis, Diagnosis, and Control Measures

• The research further delves into the pathogenesis of these respiratory viruses, illustrating how they develop and propagate within the host. This aspect is crucial to understanding how the disease progresses and how it might be intervened.
• The paper suggests molecular diagnostics on nasopharyngeal swabs as the preferred method for detecting these viruses. It also discusses various control measures that can be implemented to manage the spread of these viruses.

Prevalence of different Viruses

• Equine herpesviruses, particularly gammaherpesviruses, are found to be more prevalent in both healthy and diseased horses. On the other hand, viruses like equine rhinitis A virus, equine arteritis virus, and equine adenovirus 1 are less common.
• The transportation of horses contributes to spreading these infectious diseases across countries. Horses’ immune system temporarily weakens due to transportation, thereby increasing the risk of virus infections and reactivation of latent equine herpesviruses.

Implications on Performance and Prevention Measures

• Respiratory viral infections are commonly observed in young horses undergoing training, indicating that extensive physical activities might play a role in susceptibility to these viruses.
• The specific impact of these viruses on the performance of equine athletes is not definitively established due to limited evidence.
• The paper emphasizes the importance of vaccination and efficient care management as essential strategies to minimize the spread and severity of outbreaks in sport horses.