Found for packages labeled "Grilling Salad", with expiry date 20.08.18. People in Rogaland who have this salad at home are encouraged to bring it back to the shop to get the money back, writes Mattilsynet.
Listeria is found in many places in nature and the risk of getting it in foodstuffs is therefore relatively large. Most people get the bacterium often, without getting sick of it. For people with a diminished immune system, including pregnant women, the elderly and children, listeria can lead to serious illness.