Did you read Diagnosing Listeriosis?

How can you avoid listeriosis? The listeria bacteria live for a long time in the air, in our environment, our climate and is resistant to cold. But it can be destroyed by high temperatures after adequate cooking.

However, the infection can take place after cooking, by merely handling contaminated foods, which is known as cross-contamination.

There are no vaccines to prevent the infection. The best protection is to reduce digestive infections by maintaining rigorous food hygiene and avoiding risky foods.

The listeria bacteria can be found in meat, fish, vegetables and dairy products, both in home-cooked meals and meals that are ready to serve. The risk is higher if the foods are served raw (sushi, tartare, raw milk cheeses, meat served rare) or lightly cooked.

Photo : Sushis avec baguettes

You can’t see the contamination.

The critical prevention you can take during pregnancy is to respect basic food hygiene rules when handling, preparing cooking and storing foods, and avoid risky foods.

Foods to Avoid:

You will recognise many of these foods as your health professional likely told you to avoid them during your first pregnancy monitoring appointment.

  • Raw milk cheese
  • Pasteurised or unpasteurised soft rind cheese (brie, camembert, feta) and semi-firm cheese such as Havarti, Saint-Paulin and all blue cheeses
  • Smoked or raw fish
  • Raw shellfish
  •  Butcher products such as rillette, pâté, foie gras, jellied products, smoked sausages that weren’t heated (ex.: hot dogs), etc
  • Butcher products such as ham. Prepackaged products are less at risk for contamination
  • Homemade mayonnaise as it contains raw eggs, eggnog and other recipes calling for raw or undercooked eggs
  • Raw sprouts, such as soya, alfalfa, radish and bean sprouts


Photo : Plateau de charcuteries avec fromages

Hygiene rules for storing, handling and preparing foods:

  • Clean your fridge if vegetables, cheeses or raw meat juice is present. It is still a good idea to regularly clean your fridge and disinfected it with diluted bleach
  • Make sure the fridge temperature is low enough (4°C)
  • Store raw foods separately from cooked or ready to eat foods
  • Thaw foods in the fridge. Avoid thawing at room temperature.
  • Thoroughly rinse fruits, vegetables and herbs with tap water
  • Wash your hands before and after handling uncooked foods
  • Clean your workspace with hot soapy water after handling raw foods. Clean your utensils that came into contact with these foods. The dishwasher will disinfect them.
  • Sufficiently cook animal-based raw foods (meat, fish, raw meats such as bacon, etc.)
  • Cook ground beef to well done, as they can be contaminated in the centre
  • Avoid cheese rinds
  • Carefully reheat leftovers and cooked dishes before eating them
  • Respect best before dates

Treating Listeriosis

Listeriosis is mainly treated with antibiotics.

In the most severe cases, complications may occur and require hospitalisation. Healthy young pregnant women usually respond well to antibiotics.

So that is the latest information about listeriosis. I hope that you will remain alert and take the steps necessary to avoid infection and its adverse effects for you and your baby.

Talk soon,

The Baby Expert

Photo source: Pixabay et Unsplash

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