Food Manager Practice Exam

Listeria can thrive at temperatures lower than what threshold?

1. 30 degrees F

2. 32 degrees F

3. 41 degrees F

4. 50 degrees F

The correct answer is: 41 degrees F

Listeria monocytogenes is a bacterium known for its ability to grow at refrigeration temperatures, which is a concern in food safety. This pathogen can reproduce in cold environments, including areas where temperatures are typically maintained around 40 degrees Fahrenheit, such as in refrigerators. The threshold of 41 degrees Fahrenheit is particularly significant because it is considered the upper limit for safe refrigeration in food storage. Keeping food below this temperature slows down the growth of many pathogens, but Listeria has the capability to thrive even at temperatures just above this limit. Therefore, understanding that Listeria can grow at or near temperatures considered "safe" highlights the importance of proper food handling and storage practices to prevent foodborne illness. Other temperature options provided do not accurately reflect the growth potential of Listeria. Specifically, temperatures such as 30 degrees, 32 degrees, and 50 degrees Fahrenheit do not represent the critical threshold where Listeria is likely to be a risk in food storage, as significant growth occurs at higher temperatures, particularly around and above 41 degrees Fahrenheit.