Warning over PRRS risk in imported pigs

To keep new diseases and new strains of existing diseases such as PRRS out of the UK, protocols around imports must be followed.

The reminder has been issued by the National Pig Association, in conjunction with APHA, Pig Veterinary Society, AHDB, Pig Health and Welfare Council and SRUC.

Imported pigs and semen should only be sourced from PRRSV-negative unvaccinated herds.

Prior to purchases or importations, there should always be a direct discussion between the importer’s vet and the vet for the herd from which pigs or semen are being imported.

“This helps to avoid many of the disease risks that could otherwise occur and the vet is then in a good position to advise and interpret pre-import test results,” said NPA chief executive Lizzie Wilson.

“Negative pre-import test results are vital. If testing is only done post-import and positive results are obtained, the importer is faced with difficult but important decisions such as whether to send back, or cull, pigs that test positive, as well as the associated costs.

“No one would want to be responsible for placing the national herd at risk by allowing exotic PRRSV strains to be introduced.”

The NPA protocol states:

• Pigs must only be sourced from herds deemed to be free from both PRRSV-1 and PRRSV-2 by routine surveillance and that do not vaccinate against PRRSV
• Blood samples from a representative sample of pigs destined for export must be tested within 30 days prior to departure
• If any samples are deemed virus-positive following testing by PCR the pigs may not be released for transport to Britain. Pigs for importation should test negative for PRRSV antibody and for virus (by PCR) pre-importation.