Listeria is a bacteria that causes an illness called listeriosis. This type of food poisoning is rare, but it can result in serious illness in people such as: ▶️ Pregnant women ▶️ People with weakened immune systems ▶️ Older people (the risk increases with age) Listeria is widespread in the environment and can contaminate foods. It is most common in chilled, ready-to-eat foods such as: 🧀 soft mould-ripened cheeses - such as camembert, brie, and blue-veined cheeses 🥛 unpasteurised milk, or prod