Sanitation Certification Practice Test 2026 - Free Sanitation Practice Questions and Study Guide

Listeriosis is an infection caused by the bacterium Listeria monocytogenes, which can contaminate a variety of foods. Soft cheeses, especially those made from unpasteurized milk, pose a significant risk because Listeria can thrive in moist environments and can survive refrigeration. Soft cheeses like feta, Brie, and Camembert are particularly associated with outbreaks of listeriosis, making them a primary concern for vulnerable populations such as pregnant women, newborns, the elderly, and individuals with weakened immune systems.

While processed meats, fruits and vegetables, and baked goods can also be sources of Listeria, the association with soft cheeses is particularly strong due to the specific conditions under which these products can be made and stored. Unpasteurized dairy products, which may include various soft cheeses, have been implicated in numerous listeriosis cases, highlighting the importance of food safety practices in avoiding this infection.