What foods cause listeria in pregnancy? (2023)

What foods are most likely to carry Listeria?

Outbreaks of Listeria infections in the 1990s were primarily linked to deli meats and hot dogs. Now, Listeria outbreaks are often linked to dairy products and produce. Investigators have traced recent outbreaks to soft cheeses, celery, sprouts, cantaloupe, and ice cream.

Past listeriosis outbreaks in the U.S. have been linked to raw, unpasteurized milks and cheeses, ice cream, raw or processed vegetables, raw or processed fruits, raw or undercooked poultry, sausages, hot dogs, deli meats, and raw or smoked fish and other seafood.

Expecting mamas are 10 times more likely than non-pregnant people to develop listeriosis. The risk is even higher in pregnant Hispanic women. Listeriosis Can Affect Babies In-Utero: Even with mild symptoms, pregnant women can unknowingly pass listeriosis to their babies.

Avoid all raw and undercooked seafood, eggs, meat, and poultry while you are pregnant. Do not eat sushi made with raw fish (cooked sushi is safe). Cooking and pasteurization are the only ways to kill Listeria.

Vegetables that grow in the soil, like beets, carrots, and potatoes can come in contact with listeria in the soil, as can those that grow on low-lying vines like zucchini and other types of squash. But please don't let fear lead you to avoid veggies, which are healthiest foods in your diet.

Listeriosis is usually caused by eating food contaminated with Listeria monocytogenes. If infection occurs during pregnancy, Listeria bacteria can spread through the placenta.

Sometimes, raw fruits and vegetables contain harmful germs that can make you and your family sick, such as Salmonella, E. coli, and Listeria. The safest produce to eat is cooked; the next safest is washed. Wash fruits and vegetables under running water—even if you do not plan to eat the peel.

Listeria can infect the placenta, the amniotic fluid, and the baby, and can cause miscarriage or stillbirth. Infected babies who survive are likely to be born prematurely.

What are the first signs of Listeria?

The symptoms vary with the infected person: Higher-risk people other than pregnant women: Symptoms can include fever, muscle aches, headache, stiff neck, confusion, loss of balance, and convulsions. Pregnant women: Pregnant women typically experience only fever, and other non-specific symptoms like chills and headache.

An ultrasound to look at the baby can be used to check for an enlarged heart, thickened bowel, and increased thickness of the stomach walls, which may occur in some babies infected with Listeria. A blood test can also be performed on the baby after birth to detect whether the baby has been infected with Listeria.

Listeria can be spread to people by several different methods. Eating food contaminated with the bacteria, such as through raw (unpasteurized) milk or contaminated vegetables, is often a source for cases. The bacteria may be passed from mother to fetus during pregnancy or directly to the newborn at the time of birth.

Leafy greens and other vegetable row crops are a major source of E. coli O157 infections. Other harmful germs found on leafy greens include norovirus, Salmonella, Listeria, and Cyclospora.

Don't eat chilled seafood such as raw oysters, sashimi and sushi, smoked ready-to-eat seafood and cooked ready-to-eat prawns, which have a higher risk of listeria contamination.

While it's important to take these food-safety steps, keep in mind that listeria during pregnancy is rare. Even for Hispanic women, fewer than 1 in 10,000 women will develop listeriosis.

Although most foods and beverages are perfectly safe to enjoy, some, like raw fish, unpasteurized dairy, alcohol, and high mercury fish, should be avoided. Plus, some foods and beverages like coffee and foods high in added sugar, should be limited in order to promote a healthy pregnancy.

COOKED MEAT – Listeria is killed by cooking. Thoroughly cooking product to 165ºF/74ºC will kill the bacteria. Consumers at high risk for contracting listeriosis (e.g. pregnant women and the elderly) should reheat deli meats immediately before consumption.

The germ Listeria monocytogenes causes listeriosis. Listeria monocytogenes is commonly found in nature, especially in soil, groundwater, rotting vegetation and animal feces (poop). Most people get listeriosis from eating contaminated foods.

Can strawberries contain Listeria?

Abstract. Small fruits such as strawberries have been increasingly implicated in outbreaks of foodborne illnesses. Salmonella enterica and Listeria monocytogenes may contaminate strawberries leading to potential public health concern.

Listeria is most likely to sicken pregnant women and their newborns, adults aged 65 or older, and people with weakened immune systems. Other people can be infected with Listeria, but they rarely become seriously ill.

“Many people with a healthy immune system are able to fight off a listeria infection and most never even knew they had an infection because the symptoms were mild or non-existent,” said Dr. Price. “However, if you have a weakened immune system, listeriosis can lead to an increased risk of severe infection and death.”

Two other household products that can be effective against Listeria on food contact surfaces are hydrogen peroxide (available in 3% concentration) and distilled white vinegar (available in 5% concentration). Cooking foods thoroughly will destroy any Listeria that may be present on the food.