Listeria Symptoms Cdc Listeria Illness 2025. A more severe type of listeriosis, known as invasive listeriosis, occurs when listeria spreads beyond the intestines, according to the cdc. Although symptoms can vary, a listeria infection “can cause invasive illness and intestinal illness.”.

According to the cdc, listeria is the third leading cause of foodborne illness death in the. In most people, listeriosis can cause symptoms consistent with other foodborne illnesses.