As of December 17, 2019, a total of seven people infected with the outbreak strain of Listeria monocytogenes have been reported from five states.
Listeria specimens from ill people were collected from April 10, 2017, to November 12, 2019. Ill people range in age from less than 1 to 82 years, with a median age of 75. Seventy-one percent of ill people are male. Of six ill people with information available, four hospitalizations have been reported. One death has been reported from Texas. One illness was reported in a newborn who was infected with Listeria while the mother was pregnant, but the newborn survived.
Epidemiologic and laboratory evidence indicates that bulk hard-boiled eggs produced by Almark Foods of Gainesville, Georgia, are a likely source of this outbreak.
In interviews, ill people answered questions about the foods they ate and other exposures in the month before they became ill. Of the five people for whom information was available, four (80%) reported eating products containing eggs. Three of these people reported eating hard-boiled eggs in deli salads purchased from grocery stores and in salads eaten at restaurants.
In the PulseNet database, CDC noted two environmental samples from February 2019 that are closely related genetically to bacteria from ill people in this outbreak. FDA reports that these samples were taken during a routine inspection of the Almark Foods facility. These results provide additional evidence that people in this outbreak got sick from eating hard-boiled eggs produced by Almark Foods.
Investigators are continuing to collect records from grocery stores and restaurants where ill people reported eating hard-boiled eggs. Investigations are ongoing to determine and document the distribution and production chain, as well as the source of hard-boiled eggs to the locations reported by ill people.
CDC is concerned that bulk, fresh hard-boiled eggs produced by Almark Foods of Gainesville, Georgia, are contaminated with Listeria and have made people sick. These products were packaged in plastic pails for use nationwide by food service operators.
The investigation is ongoing to determine the source of contamination and if additional products are linked to illness. CDC will provide updates when more information is available.