What makes Listeria unique from other bacteria?

Listeria monocytogenes is unique among bacteria because it has the ability to grow and multiply at temperatures as low as 34°F (1°C), which is typically the temperature range found in cool and moist environments, such as refrigerated foods. This capability distinguishes Listeria from many other bacteria that are unable to grow at such low temperatures, making it a significant concern in food safety, particularly with ready-to-eat and cold-prepared foods.

Understanding this characteristic highlights the importance of proper food storage and handling to prevent its growth, especially in environments like deli meats, unpasteurized dairy products, and refrigerated salads. The ability of Listeria to thrive in cooler settings poses a risk as consumers may not realize that food stored at refrigeration temperatures can still harbor this pathogen if not handled correctly.