Dialysis Technician Practice Exam

What is the most likely source of staphylococcus aureus?

1. Skin irritation

2. Food contamination

3. Nasal drainage or discharge

4. Contaminated instruments

The correct answer is: Nasal drainage or discharge

Staphylococcus aureus is commonly found in specific areas of the human body, making nasal drainage or discharge a significant source for the bacteria. This bacterium tends to colonize the nasal passages of healthy individuals without causing harm. However, it can be easily transmitted through respiratory secretions and direct contact with contaminated surfaces, leading to infections in other parts of the body or in susceptible individuals. Understanding the role of nasal carriage in the transmission of Staphylococcus aureus is crucial in a clinical setting, particularly for healthcare workers and technicians. This knowledge emphasizes the importance of infection control practices, such as proper hand hygiene and wearing masks in situations where the risk of transmission is higher, especially in environments like dialysis units where patients may be more vulnerable. While skin irritation can also lead to Staphylococcus aureus infections when the skin barrier is compromised, the most consistent and prevalent carrier source is indeed the nasal passages. Food contamination and contaminated instruments can pose risks as well, but they are less commonly the primary source compared to nasal carriers in terms of widespread colonization within the general population.