The Department of Agriculture, Food and the Marine has confirmed a second case of Bluetongue virus serotype 3 (BTV-3) in Ireland in 2026, following clinical sampling of an unvaccinated cow in County Kildare.

The infected animal, situated on a suckler farm carrying 47 cows, was sampled under a suspect disease investigation after presenting with clinical signs, including abortion. Laboratory testing subsequently confirmed the presence of BTV-3, and further diagnostic testing on the herd is ongoing.

The Kildare case follows the confirmation earlier this month of Ireland's first BTV-3 infection of 2026, which was identified in an unvaccinated 16-month-old heifer in County Wexford. In that instance, the virus was detected during a post-mortem examination, with no clinical symptoms observed prior to the animal's death.

The department reiterated its advice for livestock owners to remain vigilant for signs of bluetongue, submit unexplained mortalities to regional veterinary laboratories, and consult private veterinary practitioners regarding vaccination. Department officials highlighted that vaccination remains the most effective defense against BTV-3.

Bluetongue is a vector-borne viral disease affecting ruminants such as cattle and sheep, transmitted primarily by biting midges. Department guidelines confirm that the virus presents no risk to human health or food safety, and meat and dairy products remain safe for consumption.