Equine disease surveillance: quarterly update.

This research article discusses a case of equine herpesvirus 1 (EHV-1) infection in Hampshire, United Kingdom. The outbreak led to the implementation of voluntary quarantine measures and extensive testing to control and prevent the spread of the disease.

Research Summary

In this article, the researchers report an outbreak of EHV-1 at a stable in Hampshire. A thoroughbred cross mare, lacking vaccination against the virus, showed symptoms of the disease and had to be put down. Further testing confirmed the presence of the virus through a PCR test on a nasal swab. The premises voluntarily shut down and implemented disease control measures under veterinary supervision.

Testing and Outbreak Control

• The EHV-1 outbreak prompted researchers to conduct extensive diagnostic testing, including PCR on nasopharyngeal swabs and blood tests from every resident horse.
• All 34 horses in the affected barn area were tested, demonstrating signs of EHV exposure. Nine of these showed severe neurological symptoms, with three requiring euthanasia.
• The testing regime was implemented to ensure the virus was no longer present on the premises. Once this was confirmed, the voluntary movement restrictions were lifted.

Precautionary Measures

• In response to the outbreak, visiting horses were categorized into different risk groups. This allowed the local veterinary community to create a joint statement outlining the control measures owners should take.
• The strategies involved isolation and regular testing protocols for horses of highest risk (those housed at the outbreak location). Horses that visited the premises (defined as intermediate risk) and their stablemates were also advised to be isolated and tested.
• Movement restrictions were also placed on all other horses from the same stable, as they might have been exposed to the virus and could act as a source of infection.
• The restrictions remained in place for at least two weeks after the visit until test results came back negative, at which point they were lifted.

Conclusion

In conclusion, this case of EHV-1 infection shows how effective voluntary quarantine measures and extensive testing can control and prevent the spread of the disease. The research also highlights the importance of horse owners and veterinarians working together to manage the outbreak.