# Can cooking food kill Listeria bacteria? Canonical page: https://clinicsjo.com/en/faq/can-cooking-food-kill-listeria-bacteria Language: en Category: infectious Publisher: ClinicsJo Published: 2026-09-13T08:09:52.295Z Content updated: 2026-09-13T08:09:52.295Z Translation (ar): https://clinicsjo.com/ar/faq/can-cooking-food-kill-listeria-bacteria Yes, cooking food properly can help kill Listeria monocytogenes bacteria. Listeria is a dangerous bacterium that can cause a foodborne illness known as listeriosis. Although Listeria is distinct for its ability to grow even in cold refrigerator temperatures, thoroughly heating food until it is steaming hot helps eliminate it and reduces the risk of infection [\[1\]](). ## Understanding Listeria and its risks Listeria is a bacterium found naturally in soil and water, and it can be present in a variety of raw foods, as well as processed foods and products made from unpasteurized milk. Unlike many other germs, Listeria can grow and multiply at refrigeration temperatures, making it a specific challenge for food safety [\[1\]](). This bacterium can cause serious illness, especially in high-risk groups such as pregnant women and their fetuses, the elderly, and people with weakened immune systems [\[2\]](). ## The importance of proper cooking to reduce risks To reduce the risk of Listeria infection, it is recommended to heat ready-to-eat foods and leftovers until they are steaming hot. This includes foods like hot dogs and deli meats [\[3\]](). You must ensure that the internal temperature of the food reaches a level sufficient to kill the bacteria. For example, meat and poultry must be cooked thoroughly, and raw or undercooked meat should be avoided [\[1\]](). ## Additional tips for preventing Listeria In addition to proper cooking, there are other important steps for preventing Listeria infection: - **Avoid raw milk and its products:** You should not consume unpasteurized milk or products made from it [\[1\]](). - **Use ready-to-eat foods quickly:** Use pre-cooked and ready-to-eat foods as soon as possible, because Listeria can grow over time in the refrigerator, especially if the refrigerator temperature is above 4 degrees Celsius (40 degrees Fahrenheit) [\[3\]](). - **Wash fruits and vegetables:** Wash fresh fruits and vegetables thoroughly before eating them [\[1\]](). - **Keep the refrigerator clean:** Clean the refrigerator regularly and wipe up any spills immediately [\[3\]](). - **Avoid certain high-risk foods:** Pregnant women, the elderly, and people with weakened immune systems should avoid certain foods such as soft cheeses made from unpasteurized milk, deli meats and hot dogs (unless heated until steaming hot), and refrigerated smoked seafood (unless it is part of a cooked dish) [\[3\]](). ## When should you consult a doctor? If you are pregnant, elderly, or have a weakened immune system, and you develop flu-like symptoms such as fever and muscle aches, digestive symptoms like nausea, vomiting, and diarrhea, or neurological symptoms like headache, stiff neck, and confusion, these may be signs of a Listeria infection [\[3\]](). You should contact a doctor or healthcare provider immediately if you suspect you have Listeria, as the infection can be serious and requires antibiotic treatment [\[2\]](). For pregnant women, Listeria can lead to serious complications such as miscarriage, premature birth, or stillbirth [\[3\]](). For more detailed information about Listeria infection, you can visit [Listeria infection: Dangerous food bacteria for pregnant women and the elderly (Arabic)](). ## Medical references - [Listeria Infections]() - [About Listeria Infection]() - [Listeria (Food Safety for Moms-to-Be)]() General health education; not a substitute for individualized clinical assessment. Citation URL: https://clinicsjo.com/en/faq/can-cooking-food-kill-listeria-bacteria#answer