Yes. The CDC is currently tracking four separate listeria outbreak investigations in the United States. The linked foods include prepared pasta meals, ready-to-eat foods, supplement shakes, and ready-to-eat meat and poultry products. If you’ve recently eaten any of these categories of food and feel unwell, the details below can help you figure out what to watch for.
Active Outbreak Investigations
The CDC lists the following active listeria investigations on its outbreak tracking page:
- Prepared pasta meals
- Ready-to-eat foods
- Supplement shakes
- Ready-to-eat meat and poultry products
The FDA has also posted a recall for Made Fresh Salads, Inc., covering various cream cheeses and tofu spreads due to listeria contamination. These products fall under the broader “ready-to-eat foods” category that tends to carry the highest listeria risk, since they’re consumed without further cooking that would kill the bacteria.
Outbreak details, including exact case counts and affected states, are updated on the CDC’s listeria outbreaks page as the investigations develop. If you want to check whether a specific product in your fridge is involved, the FDA’s recall page lists brand names, lot codes, and expiration dates for every recalled item.
Why Listeria Outbreaks Matter More Than Most
Listeria is rare compared to salmonella or E. coli, but it is far more dangerous. Around 1,600 cases are reported each year in the U.S., and more than 95% of those people end up hospitalized. Roughly 250 people die from listeriosis annually, giving it a fatality rate of 15 to 20%. That makes it one of the deadliest foodborne infections in the country.
For context, salmonella causes over a million U.S. infections per year but kills a much smaller fraction. Listeria’s combination of high hospitalization and high mortality is what drives the CDC to investigate even small clusters aggressively and issue recalls quickly.
Who Is Most at Risk
Listeria hits certain groups disproportionately hard. Pregnant women, adults over 65, and people with weakened immune systems face the greatest danger. About 1 in 25,000 pregnant women in the U.S. are infected with listeria each year, and the consequences can be severe: 1 in 4 pregnant women who develop listeriosis lose their pregnancy or their baby shortly after birth. The bacteria can cross the placenta and harm the fetus even when the mother’s own symptoms feel mild.
People on immunosuppressive medications, those undergoing chemotherapy, and individuals with conditions like diabetes, liver disease, or kidney disease also face elevated risk. In these groups, the infection is more likely to spread beyond the gut into the bloodstream and brain.
Symptoms and How Quickly They Appear
Symptoms of invasive listeriosis typically start within two weeks of eating contaminated food, though they can appear anywhere from a few days to over a month later. That long incubation period is part of what makes listeria tricky. You may not connect your symptoms to something you ate weeks ago.
In pregnant women, the symptoms often look like a mild flu: fever, muscle aches, and fatigue. It’s easy to dismiss these as a normal part of pregnancy, which is exactly what makes listeria so risky during this time.
In other people, the infection can progress to more serious signs, including:
- Fever and flu-like symptoms (muscle aches, fatigue)
- Headache and stiff neck
- Confusion or loss of balance
- Seizures
Stiff neck, confusion, and loss of balance signal that the infection has reached the brain or its surrounding membranes. This is a medical emergency.
How Listeriosis Is Diagnosed
Doctors diagnose listeriosis through a blood culture. If there are neurological symptoms like confusion or a stiff neck, a spinal fluid sample may also be tested. Stool tests are not useful for diagnosing listeria, and blood antibody tests are unreliable for this particular infection.
One important detail: if you were exposed to a recalled product but feel fine, there’s no recommended screening test. Testing is only useful once symptoms develop.
What Treatment Looks Like
Invasive listeriosis requires hospitalization and intravenous antibiotics, typically given for 14 to 21 days. The length of treatment reflects how difficult the bacteria can be to fully clear, especially when it has reached the bloodstream or nervous system.
For people with milder symptoms and a known exposure, oral antibiotics are sometimes prescribed, though there isn’t strong data on how well they work in that scenario. The key takeaway: if you develop fever and flu-like symptoms after eating a recalled product, getting evaluated quickly gives you the best chance of catching the infection before it becomes invasive.
How to Protect Yourself During an Active Outbreak
Check your refrigerator against the current recall lists on the FDA’s website. If you have any recalled products, throw them away. Don’t just rely on smelling or looking at the food. Listeria doesn’t change the taste, smell, or appearance of what it contaminates.
Beyond the specific recalls, a few habits lower your listeria risk in general. Keep your refrigerator at 40°F or below, since listeria is unusual among bacteria in that it can grow at refrigerator temperatures. Eat deli meats and hot dogs only after heating them until steaming. Avoid unpasteurized milk and soft cheeses made from it. Rinse fresh produce under running water, even if you plan to peel it.
Pregnant women and immunocompromised individuals may want to avoid deli salads, prepackaged ready-to-eat meals, and soft cheeses altogether until the active outbreaks are resolved. These foods appear repeatedly in listeria investigations because the bacteria thrive in cold, moist environments and the products aren’t cooked before eating.