A Listeria monocytogenes outbreak tied to deli headcheese produced in Chicago has prompted federal health officials to issue a public health alert affecting consumers across multiple states. On May 14, 2026, the USDA's Food Safety and Inspection Service confirmed that headcheese samples produced by Crawford Sausage Co. in Chicago, Illinois, tested positive for the outbreak strain of Listeria monocytogenes — the same bacteria that causes serious, and sometimes fatal, foodborne illness, particularly in pregnant women, newborns, older adults, and people with weakened immune systems.

The implicated product — Daisy Brand Meat Products Headcheese — was sold in retail deli cases in various weight packages with a use-by date of March 26, 2026. Although the use-by date has passed, Listeria outbreaks are often identified weeks or months after exposure because of the bacterium's unusually long incubation period, meaning people sickened by this product may still be getting ill or may have already been hospitalized without their illness being connected to this product.

Read more

Listeria's Long Incubation Period: Why This Outbreak Is Hard to Track

Listeria monocytogenes is one of the most dangerous foodborne bacteria precisely because it can cause disease 1 to 70 days after exposure — with an average incubation period of about 3 weeks. This means that a person who ate contaminated headcheese from a deli counter in mid-April may not develop symptoms until late May or even June. By that time, the connection to the original food source is often lost, leading to underdiagnosis and delayed public health response.

Listeria also thrives in cold temperatures, unlike most other pathogens that are slowed or killed by refrigeration. This makes deli products, ready-to-eat meats, and cold-prepared foods particularly high-risk items. The CDC estimates that Listeria causes approximately 1,600 illnesses and 260 deaths in the United States each year, making it one of the most lethal foodborne pathogens relative to its infection rate.

Pregnant Women and the Elderly Face the Greatest Danger

For most healthy adults, Listeria infection causes flu-like symptoms — fever, muscle aches, nausea, and diarrhea. However, in vulnerable populations, the consequences are far more severe. Pregnant women infected with Listeria are 10 times more likely than others to develop serious illness, and the infection can cause miscarriage, premature birth, and newborn death. Older adults and immunocompromised individuals can develop meningitis, brain infection, or bloodstream infection, all of which are potentially fatal.

Anyone who purchased or consumed Daisy Brand Meat Products Headcheese before March 26, 2026, particularly those in high-risk groups, should monitor for symptoms. If you develop a high fever, severe headache, stiffness, nausea, abdominal pain, or diarrhea — especially if you are pregnant or immunocompromised — seek medical care immediately and tell your doctor about the possible Listeria exposure.

Headcheese — a deli meat product made from the flesh of an animal's head, set in gelatin — is a specialty product consumed in specific cultural and regional communities. The fact that the recall was not issued until samples were collected and genomically sequenced weeks after initial concern underscores a gap in the preemptive testing protocols for specialty deli products that do not receive the same scrutiny as mainstream meat products. The FSIS recall database is updated as the investigation continues.