Which statement correctly describes the sequence of infection control steps?

• A. Cleaning is the first step.
• B. Disinfection is the first step.
• C. Sterilization is the first step.
• D. PPE is the first step.

Answer: (A)

The main idea is that cleaning comes first in infection control because you must remove dirt, oils, and organic matter before any disinfectant can work effectively. Without cleaning, disinfectants may not reach or kill all microorganisms since debris can shield them. Once cleaned, you apply disinfection to reduce the remaining pathogenic organisms on nonporous surfaces. Sterilization is for instruments that enter the body and isn’t the first step in routine surface decontamination. PPE is essential for safety and should be used as you carry out these steps, but it isn’t the starting point in the sequence of cleaning, disinfecting, and sterilizing.