Why Can’t You Have Deli Meat While Pregnant? | Listeria Risk

Pregnant women are advised to avoid deli meats due to the risk of listeriosis, a serious infection that can harm the fetus.

You probably remember being told to skip deli meat during pregnancy. The warning sounds overly cautious — millions of people eat deli sandwiches every week without getting sick. But there is a specific bacterial reason behind the rule.

Listeria monocytogenes causes listeriosis, and pregnant women are about 10 times more likely to contract it than the general population. This article explains the biology behind the recommendation and offers safe alternatives.

The Bacterial Culprit: Listeria monocytogenes

Listeriosis is a serious infection caused by eating food contaminated with Listeria monocytogenes. For most healthy adults, it causes mild flu-like symptoms or no illness at all. But during pregnancy, the stakes are higher.

The bacteria can cross the placenta and cause severe complications including miscarriage, stillbirth, or life-threatening infection in newborns. This is why organizations like the FDA, CDC, and ACOG all list deli meats as a food to avoid during pregnancy.

The key issue is that Listeria is unusually hardy. Unlike many foodborne bacteria, it can survive and even grow at refrigerator temperatures — meaning refrigeration alone doesn’t make deli meats safe. Cold cuts and hot dogs can pick up the bacteria during processing or at the deli counter, and since they are typically eaten without further cooking, the bacteria may be consumed alive.

Why Pregnant Bodies Are More Vulnerable

The immune system naturally suppresses itself during pregnancy to avoid rejecting the fetus. This leaves pregnant women more susceptible to infections like listeriosis. ACOG notes that pregnant women are about 10 times more likely to get listeriosis than the general population.

• Immune suppression: The body reduces certain immune responses to protect the fetus, making it harder to fight off Listeria. Even a small bacterial load can cause infection.
• Hormonal changes: Increased progesterone can slow digestion, giving bacteria more time to grow in the gastrointestinal tract before being expelled.
• Placental transfer: Listeria can infect the placenta, leading to fetal infection even without severe maternal symptoms. The baby’s immune system is not developed enough to fight it.
• Variable symptoms: Mild or absent symptoms in the mother can delay treatment, allowing the infection to progress unchecked.
• Outcome severity: The consequences for the baby can be severe, even if the mother feels fine, making prevention critical.

These factors make the advisory more than just overcaution. The CDC and NHS both classify deli meats as high-risk because of this combined vulnerability.

When Refrigeration Isn’t Enough

Most foodborne bacteria stop growing in the cold, but Listeria monocytogenes is different. It can multiply at typical refrigerator temperatures, which is why even well-chilled deli meats can pose a risk.

The 2019 listeria outbreak was traced to a specific processing facility outbreak, confirming contamination can happen before meat reaches stores. This resilience means that simply keeping deli meats cold is not a reliable safety measure.

Because Listeria can survive cold, the only reliable way to eliminate it from deli meats is to heat them until steaming hot — 165°F. That temperature kills the bacteria, making the meat safe for pregnant women.

Heating effectively neutralizes the bacteria, but knowing exactly how hot is hot enough matters. A food thermometer can help ensure the meat reaches 165°F.

What About Other Cured Meats?

The warning about deli meats often extends to cold cured meats like salami, chorizo, pepperoni, and ham. These products are not fully cooked and may contain parasites that cause toxoplasmosis, another infection dangerous during pregnancy.

1. Check the label: Some cured meats are cooked or smoked and may be safe; look for “fully cooked” on the package. If you’re unsure, treat them the same as deli meats.
2. Heat before eating: Like deli meats, heating cured meats until steaming kills both listeria and toxoplasma parasites. The same 165°F guideline applies.
3. Avoid if not heated: The NHS recommends avoiding all cold cured meats unless they are cooked or reheated. Even products labeled “ready-to-eat” are not considered safe cold during pregnancy.
4. Consider alternatives: Cooked versions of these meats, such as cooked ham or pepperoni on a fully baked pizza, are safe because the heat has killed pathogens.

The risk from toxoplasmosis is separate from listeria but equally serious. Taking these simple steps can help you enjoy similar flavors without worry.

The Safe Way to Satisfy a Deli Craving

Craving a turkey sandwich doesn’t have to be off-limits. The CDC’s guidance is straightforward: heat deli meat until it’s steaming hot — 165°F — just before serving. This kills any listeria present.

You can do this in a microwave, skillet, or oven. Let it cool enough to eat, and enjoy it right away. The key is eating it immediately — reheating and then letting it sit at room temperature could allow bacteria to grow again.

Heating to 165°F eliminates listeria — the CDC deli meat safety page explains the full process. Many doctors and midwives share this same advice.

The Bottom Line

The reason you can’t have deli meat during pregnancy is the small but real risk of listeriosis. Heating the meat to 165°F eliminates that risk, allowing you to safely enjoy it if you choose. The absolute risk is very low, but the potential consequences make the precaution worthwhile.

If you have eaten deli meat already and are feeling fine, there is no need for alarm — most pregnant people who eat it never get ill. But if you develop fever, muscle aches, or nausea, contact your obstetrician or midwife just to be safe.