Desert Storks

Listeria and Pregnancy

Listeria is a bacteria that is found in nature and lives in some foods. Sources of Listeria include most animals, soil, vegetation and sewerage. Because of this, Listeria can easily enter our food chain. An infection with Listeria can cause mild ‘flu-like’ symptoms, urinary tract infections or even quite serious illness. In adults who have an impaired immune system, Listeria can cause illnesses such as meningitis, pneumonia and encephalitis. The bacteria that causes Listeria is called Listeria monocytogenes. In pregnancy this bacteria can pass across the placenta and reach the baby. Listeria during pregnancy can cause abortion, premature rupture of membranes, premature birth and very sick babies. Listeria infections are not new, however it has only been known since 1980’s that it can be passed onto humans through food.

An infection with Listeria can be easily missed as it often presents with vague symptoms. A blood test or a test on the amniotic fluid can identify a Listeria infection. Listeria can be treated with certain antibiotics. If a baby contracts a Listeria infection it can become extremely sick with respiratory problems or meningitis. The baby can even die. Listeria infection is quite rare in Australia, but when it occurs in pregnancy it can have serious complications. It is for this reason that information is now being made available to pregnant women, so that they can make safe choices on the foods to eat during pregnancy.

The bacteria that causes Listeria is sensitive to heat. So by cooking food well, you are able to destroy it. When cooking meats ensure that the meat is cooked right through. Rare meat is not recommended. If you use the microwave to reheat, ensure that the food is steaming hot right through to the centre. While heat destroys Listeria, refrigeration does not. Listeria is one of the few bacteria that are able to grow on food in the refrigerator. So if food has been stored for longer than twelve hours after cooking - it is recommended that you do not eat it. Also avoid chilled ready to eat foods.