The outbreak, which began in June 2023, has been linked to a specific strain of Listeria monocytogenes, known as the “EGD” strain. This strain is particularly dangerous because it can survive in cold temperatures and is highly resistant to antibiotics. “EGD” strain is responsible for the majority of cases in the outbreak. The CDC has issued a warning about the “EGD” strain, urging people to be cautious and practice safe food handling. The agency has also recommended specific measures to prevent the spread of the outbreak, including thorough handwashing, proper food storage, and avoiding cross-contamination.

The bacterium can survive in a variety of environments, including soil, water, and animal intestines. It can also survive in refrigerated environments, making it a significant food safety concern. Listeria monocytogenes, the most common species of Listeria, is a facultative anaerobe, meaning it can survive with or without oxygen. This allows it to thrive in a wide range of environments, including those with low oxygen levels. Listeria monocytogenes can cause a serious illness called Listeriosis.