EHDV-7 turns serotype into a cattle-logistics variable

Spain has confirmed circulation of epizootic haemorrhagic disease virus serotype 7, EHDV-7, for the first time—and therefore the first detection of this serotype in the European Union. Spain’s veterinary authority reported on 5 November three outbreaks on cattle farms in Cádiz, Badajoz and Ciudad Real. The animals showed fever and mucosal lesions; confirmation was made by the Central Veterinary Laboratory in Algete.

Until now, Spain had detected only EHDV-8, for which two authorised vaccines have been available since August 2024. According to the ministry, those vaccines are not effective against serotype 7. That has direct practical relevance: previous vaccination or an EHDV-8-based management strategy cannot be assumed to provide protection against the newly detected serotype.

The ministry is, for now, keeping movements within mainland Spain open for both breeding and slaughter, provided animals show no clinical signs. Relevant requirements continue to apply for movements to the Balearic and Canary Islands and to the rest of the EU. The disease is transmitted by Culicoides biting midges, affects mainly cattle and wild ruminants, and is not zoonotic.

For the meat chain, the announcement does not amount to an automatic supply interruption. It does require three elements to be kept separate: clinical surveillance at origin, verification of health status before transport, and destination-specific requirements. Livestock logistics now need to work with serotype, zone and movement purpose. A single aggregate health indicator is insufficient when vaccination, transport conditions and market access may diverge.