Pig death rates of up to 15% were reported by some pig units after an outbreak of suspected streptococcus suis last November.

Three cases were confirmed by the Department of Agriculture laboratory in Backweston.

“Laboratory testing indicated streptococcus suis as the most likely aetiological agent,” the Department said.

“Mortality of 10% to 15% was reported in affected batches, with pigs of various ages affected.”

The infection is usually spread from nose-to-nose contact in pigs and occurs mainly in young pigs under 12 weeks.

It can cause meningitis, fertility disruption, pneumonia and septicaemia and is particularly dangerous since it can also be transmitted to humans.

According to MSD, the infection was the most common cause of meningitis in pigs submitted to veterinary laboratories in both Northern Ireland and the Republic of Ireland last summer.

Changes to on-farm biosecurity practices and management of pigs were recommended to limit losses.

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