The first case of Bluetongue virus serotype 3 (BTV-3) of the current vector season has been confirmed in the Vale of Glamorgan. The affected bovine showed clinical signs and was positive on PCR but negative on serology tests meaning the infection was recently acquired and the disease is actively circulating in this area of Wales. The animal was part of an unvaccinated herd that reported a high incidence of abortion to APHA.
As a result of the heatwave, the cumulative temperature threshold for virus incubation has been surpassed in all areas of Wales. This means midges can become infectious in a very short period of time (in some cases less than a week from taking an infectious blood meal) and will be able to pass the virus to any animals they bite subsequently.
This detection serves as an important reminder that Bluetongue remains a significant disease threat to susceptible livestock, particularly while midges are active. Continued vigilance from livestock keepers, veterinary practices, markets, and the wider industry is essential.
We would welcome your assistance in sharing the following information through your networks.
Key messages for livestock keepers
Please remind livestock keepers to:
- Remain vigilant for signs of bluetongue in sheep, cattle, goats, deer and camelids.
- Report any suspicion of bluetongue to APHA.
- Review on-farm biosecurity measures and minimise unnecessary disease risks.
- Speak to their private veterinarian about vaccination and whether it is appropriate for their herd or flock.
- Ensure any animal movements comply with current restrictions and licensing requirements.
- Maintain awareness that some infected animals, may show mild or no obvious clinical signs while still contributing to disease spread.
- Report cattle abortions to APHA
Biosecurity reminders
Although bluetongue is primarily spread by infected biting midges, good biosecurity remains important:
- Limit unnecessary livestock movements.
- Isolate and monitor newly arrived stock where practicable.
- Source animals responsibly and check health status before purchase.
- Reduce opportunities for vector exposure where feasible.
- Maintain good records of livestock movements and vaccination status.
- Ensure staff know the clinical signs and reporting requirements.
Further information
Up-to-date information on bluetongue, current restrictions, vaccination and reporting requirements can be found at:
