Arizona Certified Nursing Assistant (CNA) Practice Test

Which of the following illustrates an example of disinfection?

1. Washing hands with soap and water

2. Cleaning a shower chair with a chemical cleanser

3. Using a vacuum cleaner on the floor

4. Wiping down surfaces with a dry cloth

The correct answer is: Cleaning a shower chair with a chemical cleanser

Disinfection refers specifically to the process of using chemicals to eliminate or reduce harmful microorganisms on surfaces, making them safe for use, particularly in healthcare settings. In this context, cleaning a shower chair with a chemical cleanser is an example of disinfection because the chemical cleanser is designed to kill or inactivate pathogens that may be present on that surface. Washing hands with soap and water primarily serves to remove dirt, debris, and some microorganisms, but it does not necessarily kill all pathogens, thus it is more about sanitation than disinfection. Using a vacuum cleaner on the floor involves removing dirt and debris but does not specifically target pathogens, so it does not meet the criteria for disinfection. Wiping down surfaces with a dry cloth merely removes loose particles and does not actively kill germs or pathogens, also excluding it from the process of disinfection. Therefore, the action of cleaning a shower chair with a chemical cleanser stands out as an effective example of disinfection, emphasizing the importance of using the correct methods to ensure surfaces are safe in a healthcare environment.