What factor can lead to foodborne illness related to listeriosis?

Listeriosis is a serious infection caused by the bacterium Listeria monocytogenes, which can be particularly dangerous for certain populations, including pregnant women, newborns, the elderly, and individuals with weakened immune systems. The bacterium is commonly found in soil, water, and animal feces, and it can contaminate various food products.

The correct answer focuses on food contaminated with Listeria monocytogenes, as this is the direct cause of listeriosis. Foods such as unpasteurized dairy products, soft cheeses, deli meats, and ready-to-eat foods that are not heated can harbor this pathogen, leading to illness upon consumption.

Understanding the specific link between food contamination and listeriosis is crucial for preventing outbreaks and protecting vulnerable populations. This emphasizes the importance of safe food handling and preparation practices to minimize the risk of this foodborne illness.