AAA Food Manager Certification Practice Test

Which of the following bacteria can be found on the skin and in the nose?

1. Bacillus cereus

2. Shigella

3. Staphylococcus aureus

4. Salmonella

The correct answer is: Staphylococcus aureus

Staphylococcus aureus is a common bacterium that is found on the skin and in the nasal passages of many individuals. This bacterium is part of the normal flora of the human body and can exist without causing harm; however, it has the potential to lead to infections if it enters the body through cuts or other openings. Understanding this characteristic is essential for food safety, as Staphylococcus aureus can produce toxins that may survive cooking, highlighting the importance of maintaining proper hygiene and food handling practices to prevent contamination and illness. Effective handwashing and implementing safe food handling procedures are key to preventing the spread of this bacterium in food service environments. Other bacteria listed, such as Bacillus cereus, Shigella, and Salmonella, are typically associated with foodborne illnesses and originate from different sources rather than being part of the normal flora on human skin or in the nasal passages. This is why Staphylococcus aureus is recognized specifically for its presence in those areas.