A product recall has been issued for ham contaminated with listeria being sold at Costco stores throughout the country.
The "Easy Cut Shoulder Ham" has been recalled from Costco warehouses in Victoria, New South Wales, Queensland, South Australia and the ACT over listeria contamination.
Pregnant women, the elderly and those with poor immune systems are most at risk of the bacterial infection, which causes fevers and aches, and in most serious cases can result in meningitis or blood poisoning.
The affected batch of three kilogram hams carry the expiry date March 2, 2016.
Food Standards Australia and New Zealand is urging anyone concerned about their health after eating ham to see a doctor.
Costco is offering a full refund to anyone who bought one of the affected hams.
A total of 70 cases of listeria infections were reported throughout the country last year, Department of Health data shows.