When a food recall is announced, most people do the obvious thing: they throw out the product. For most foodborne pathogens, that is sufficient. For Listeria monocytogenes, it is not.
Listeria is unusual among foodborne bacteria in one critical way: it can survive, grow, and even thrive at the temperatures inside a home refrigerator. Once a contaminated food product has been stored in your refrigerator — even briefly — the bacteria can transfer to shelves, drawers, containers, and other foods. Simply discarding the recalled product does not eliminate the risk.
Following any recall involving Listeria-contaminated products, the CDC recommends a specific and thorough cleaning protocol that most consumers are unaware of.
Why This Matters
Listeriosis — the illness caused by Listeria monocytogenes — is among the most serious of all foodborne diseases. The CDC estimates that Listeria causes approximately 1,600 illnesses and 260 deaths in the United States each year. The death rate from listeriosis is about 20 percent — far higher than most other foodborne illnesses.
Soft cheeses, deli meats, unpasteurized products, and ready-to-eat foods have historically been the most common vehicles for Listeria. But because the bacteria can persist on refrigerator surfaces for weeks to months, exposure can occur even after recalled products have been removed from the home.
What We Know So Far
Listeria monocytogenes has a longer incubation period than most foodborne pathogens. Symptoms of listeriosis can appear anywhere from one day to 10 weeks after exposure — an unusually wide window that often makes it difficult for patients and physicians to connect illness to a specific food source.
The FDA and CDC have issued specific guidelines for cleaning refrigerators after a Listeria-linked recall. According to the CDC, surfaces that may have come into contact with recalled products should be washed with hot soapy water or cleaned in a dishwasher. Additional sanitization steps include using a dilute bleach solution (one tablespoon of liquid chlorine bleach per gallon of water) on hard surfaces and allowing surfaces to air dry or wiping them with clean paper towels.
Where the Risk Is Highest
Refrigerator drawers and crisper compartments pose the highest contamination risk because they tend to trap moisture and food residue. Soft surfaces such as rubber gaskets around the door seal are particularly prone to harboring Listeria because they are difficult to clean thoroughly and rarely replaced.
Any shelf, drawer, or storage container that may have made direct contact with a recalled cheese or other Listeria-linked product — or with the liquid that drains from such products — should be considered potentially contaminated.
People who shared a recalled product with others or used refrigerator containers that have since been used to store other foods should assume those secondary containers may also require cleaning.
What Doctors and Experts Say
Clinical experts and public health officials emphasize two points about Listeria that distinguish it from more familiar foodborne pathogens. First, unlike Salmonella or E. coli, which cause illness primarily through high-volume exposure, Listeria can cause serious illness at relatively low bacterial levels in people who are immunocompromised or pregnant. Second, the delayed incubation period means that a person who ate a recalled product weeks ago may still develop illness, and may not connect it to the recalled food.
Pregnant individuals, adults 65 and older, and people with conditions that suppress the immune system — including cancer, organ transplant, HIV, or high-dose steroid use — face the highest risk of serious illness, hospitalization, and death from listeriosis.
What the Evidence Shows — and What It Does Not
The science on Listeria's cold-tolerance is well established. Studies have shown the organism can survive on refrigerator surfaces for weeks to months and can grow even at temperatures as low as 34°F — standard refrigerator temperature. The CDC's cleaning recommendations are evidence-based and designed specifically for this property of the organism.
The effectiveness of home cleaning protocols, when followed correctly, has been demonstrated in food safety research. The challenge is that many consumers either do not know the protocol exists or assume that discarding the recalled product is sufficient.
Who Faces the Greatest Risk?
People at highest risk for severe listeriosis include:
- Pregnant people and their newborns (Listeria can cross the placenta and cause miscarriage, stillbirth, or serious neonatal infection)
- Adults 65 and older
- People with cancer, HIV/AIDS, organ transplants, or conditions treated with immunosuppressive medications
- People with diabetes or liver disease
- Anyone who consumes raw or undercooked meat, soft unpasteurized cheeses, or deli products
Healthy adults with intact immune systems can also develop listeriosis, though it is typically less severe, usually presenting as a febrile gastrointestinal illness.
Symptoms and Warning Signs to Watch For
Symptoms of listeriosis can vary based on the affected population.
In most otherwise healthy adults, Listeria causes:
- Fever and chills
- Muscle aches
- Nausea, diarrhea, and vomiting
In at-risk populations — particularly pregnant people and immunocompromised adults — Listeria can spread beyond the gut to cause invasive disease, including:
- Meningitis (severe headache, stiff neck, confusion, and sensitivity to light)
- Septicemia (bloodstream infection with fever and chills)
- Encephalitis
- Premature delivery or pregnancy loss in pregnant people
Because the incubation window ranges from one day to 10 weeks, people who are at high risk should contact a clinician if they develop any of these symptoms and have consumed a recalled product in the previous two months.
Step-by-Step: How to Clean Your Refrigerator After a Recall
Following CDC guidelines, here is the recommended protocol after a Listeria-linked food recall:
- Remove and discard the recalled product. Seal it in a plastic bag before placing it in the trash to prevent cross-contamination.
- Remove all food from the refrigerator and set it aside in a cool place or on ice.
- Wash all shelves, drawers, and walls of the refrigerator with hot soapy water, then rinse thoroughly.
- Sanitize surfaces with a solution of one tablespoon of liquid chlorine bleach per gallon of water. Apply to all hard interior surfaces and allow it to sit for a few minutes before wiping.
- Wipe down the door gaskets and seals, which are frequently overlooked but can harbor bacteria in crevices.
- Wash the outside of any food containers or jars that were stored near the recalled product with hot soapy water before returning them to the refrigerator.
- Wash hands thoroughly with soap and water for at least 20 seconds before and after handling potentially contaminated items.
- Run drawers and removable shelving through a dishwasher if they are dishwasher-safe.
Cost and Access: What Patients Should Know
The cleaning supplies needed for this protocol — dish soap, liquid chlorine bleach, and paper towels — are inexpensive and widely available. No special equipment is required. For people who are immunocompromised or pregnant and who may have consumed a recalled product, even a brief telephone consultation with a physician can clarify whether testing or prophylactic treatment is warranted based on individual risk factors.
What Happens Next
Listeria recalls are issued on an ongoing basis throughout the year. The FDA maintains a current recall database that can be checked at FDA.gov/recalls. Consumers who regularly purchase soft cheeses, deli meats, or other Listeria-vulnerable foods should check this database periodically. MedicalDaily will continue covering Listeria-linked recalls as they are announced.
The Bottom Line
If a food product in your refrigerator has been recalled for Listeria, throwing out the product alone is not enough. The bacteria can persist on refrigerator surfaces and in door seals for months at standard refrigerator temperatures. Follow the CDC's cleaning protocol — hot soapy water, bleach sanitization, and thorough gasket cleaning — and monitor for symptoms for up to 10 weeks if you consumed the product before the recall. High-risk individuals, including pregnant people and older adults, should contact a clinician promptly.
