As of September 30, 2026, FDA’s outbreak table carries a new Listeria monocytogenes investigation, reference #1415, with 11 people sick. The food has not been identified, no states, hospitalizations or deaths have been disclosed, no company has been named and no recall has been issued. FDA says it has started a traceback. CDC has posted no notice. It is the third open Listeria file on FDA’s table with no food named, and the three together now carry 66 cases.
FDA posted the new file on September 30 with a traceback and nothing else.
FDA’s table of active outbreak investigations was updated Wednesday, September 30. Its What’s New line reads: “A new outbreak of Listeria monocytogenes (ref #1415) linked to a not yet identified product, has been added to the table. FDA has initiated traceback.” A traceback means investigators are working backward from what sick people reported eating toward a common supplier. The row shows no on-site inspection, no sampling and no recall. Food Safety News reported the new file Thursday morning.
Two older Listeria files on the same table also grew this week.
The same update moved file #1417, posted September 23, from 40 to 44 sick, and file #1379, posted July 22, from 10 to 11. Neither names a food. Added together, the three unnamed Listeria files on FDA’s table carry 66 cases: 11 + 44 + 11 = 66. CDC’s dashboard, re-dated September 30, counts six active multistate Listeriainvestigations nationally and names none of them. Bill Marler walked every open file on FDA’s table in his September 29 post on Marler Blog; this new file was added the next day.
No food has been named, so there is nothing to throw away yet.
FDA’s rule is that it will not name a specific product until there is enough evidence to implicate it as a cause of illness. Until then, the public is told the count and the pathogen. That makes this file different from a recall, where there is a product, a lot code and a shelf to check. The most recent Listeria recall this blog covered, the bettergoods Lemon Alfredo Fettuccine sold at Walmart, came from state lab sampling with no illnesses; the most recent Listeria outbreak it covered, the Clover Hill Dairy requesón outbreak, ended at 15 sick, 14 hospitalized and one dead. Eleven linked cases is already an outbreak of comparable size, and the number tends to rise as more samples are sequenced.
Listeria is dangerous because of who it hurts and how slowly it shows up.
Listeria monocytogenes is a bacterium that keeps growing at refrigerator temperatures and hides in ready-to-eat foods that are not cooked again before eating: deli meats and hot dogs, soft cheeses and raw milk, smoked seafood, cut melon, sprouts, packaged salads and prepared meals, and ice cream. Most healthy people who eat a contaminated food never get sick or have only a mild stomach upset. The people who get seriously ill are pregnant women and their newborns, adults 65 and older, and people with weakened immune systems. For them, CDC says invasive illness usually starts within two weeks of eating the contaminated food, but it can take as long as 70 days. That lag is why an outbreak can be months old before anyone connects the cases, and why the food in this file may have been eaten weeks ago.
Pregnant women can feel only mildly ill while the infection reaches the baby.
In pregnancy, listeriosis often feels like a mild flu: fever, muscle aches, fatigue. The danger is that the bacteria can cross the placenta and cause miscarriage, stillbirth, premature delivery or a life-threatening infection of the newborn, even when the mother barely feels sick. In older adults and people with weakened immunity, the infection can reach the bloodstream and the brain; the warning signs are fever with a headache, a stiff neck, confusion, loss of balance or seizures. If you are in one of those groups and you have a fever with flu-like symptoms, tell your doctor and say you are concerned about Listeria; a blood test can confirm it, and it is treatable with antibiotics if it is caught. More is at About Listeria.
What to do while the food is still unnamed.
There is no product to avoid yet, so the protection is the standard one for people at high risk: skip unpasteurized milk and cheese made from it, heat deli meats and hot dogs until steaming, do not eat refrigerated smoked seafood unless it is cooked into a dish, and eat cut melon and prepared salads soon after buying them. Keep your refrigerator at 40°F or below. If a health department calls to say you are part of this outbreak, it is because a laboratory matched the Listeria from your blood or spinal fluid to the cluster; answer the food questionnaire in as much detail as you can, and keep receipts, loyalty-card records and packaging. Those interviews are how the eleven become a food with a name.
Three questions people are asking.
Is there a Listeria outbreak right now? Yes. As of September 30, 2026, FDA lists a new Listeria monocytogenes outbreak with 11 people sick and no food identified, plus two older unnamed Listeria files with 44 and 11 sick. No states have been listed and no recall has been issued.
What food is causing the Listeria outbreak? FDA has not said. It has started a traceback but has not named a product, a company or a product category. Until it does, there is nothing specific to throw away; people at high risk should follow the standard Listeria precautions above.
What are the symptoms of Listeria, and when should I see a doctor? Fever, muscle aches and fatigue, sometimes with headache, stiff neck, confusion or loss of balance. Symptoms usually start within two weeks of eating contaminated food but can take up to 70 days. If you are pregnant, 65 or older, or have a weakened immune system and you have a fever with those symptoms, see a doctor and mention Listeria.
Listeria
Listeria monocytogenes is a bacterium that grows in refrigerator cold, hides in ready-to-eat foods, and causes one of the deadliest foodborne infections known. Pregnant women, newborns, adults over 65 and people with weakened immune systems are at the greatest risk, and in pregnancy an infection that feels like a mild flu can end the pregnancy or reach the baby.
Marler Clark, The Food Safety Law Firm, is the nation’s leading law firm representing victims of Listeriaoutbreaks. The Listeria attorneys of Marler Clark have represented thousands of victims of Listeria and other foodborne illness outbreaks and have recovered over $850 million for clients. Marler Clark is the only law firm in the nation with a practice focused exclusively on foodborne illness litigation. Our Listeria lawyers have litigated Listeria cases stemming from outbreaks traced to lettuce, polony, deli meat, cantaloupe, cheese, celery and milk, including the families of the 33 people who died in the 2011 Jensen Farms cantaloupe outbreak and victims of the 2024 Boar’s Head deli meat outbreak.
If you or a family member became ill with a Listeria infection after consuming food and you are interested in pursuing a legal claim, contact the Marler Clark Listeria attorneys for a free case evaluation at 1-800-884-9840.
FAQ
What is Listeria? Listeria monocytogenes is a bacterium found in soil, water and animals that contaminates food and, unlike most foodborne bacteria, keeps growing at refrigerator temperatures. Infection with it is called listeriosis.
What foods cause Listeria outbreaks? Ready-to-eat foods that are not cooked again before eating: deli meats and hot dogs, soft cheeses and raw milk, smoked seafood, cut melon, sprouts, packaged salads and prepared meals, and ice cream.
Why is Listeria so dangerous in pregnancy? A pregnant woman may have only a mild fever and aches, but the bacteria cross the placenta and can cause miscarriage, stillbirth, premature delivery or a life-threatening infection of the newborn. Symptoms can appear up to 70 days after eating the contaminated food, so a pregnant woman who ate a recalled product should tell her doctor even if she feels well.
Can I sue if I got sick from Listeria? Yes. If your infection is confirmed by a lab and linked to a contaminated product or an outbreak, you may have a claim against the companies that made and sold the food. Marler Clark offers a free case evaluation.
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