Under which circumstances should hand hygiene use soap and water rather than an alcohol-based sanitizer?

• A. After restroom use.
• B. Hands are visibly dirty with dirt or body fluids.
• C. When hands are visibly dirty with dirt or body fluids, after using the restroom, or after caring for patients with Clostridioides difficile.
• D. Always use soap and water instead of sanitizer.

Answer: (C)

Using soap and water is essential whenever hands are visibly dirty or soiled with dirt or body fluids, after using the restroom, or after caring for patients with Clostridioides difficile. The reason is that soap and water physically removes dirt and microorganisms from the skin, including spores like C. difficile, which alcohol-based hand sanitizers may not effectively remove or kill. Sanitizers are convenient and work well when hands aren’t visibly dirty and there’s no concern about spores, but they won’t reliably address visible soil or spore contamination. Therefore, these specific circumstances call for soap and water, while sanitizer can be used in other situations.