Which statement about hand hygiene in aseptic technique is correct?

• A. It has no impact on contamination risk
• B. It slows down all laboratory workflows
• C. It is unnecessary for most microbiology work
• D. It reduces the risk of contamination

Answer: (D)

Hand hygiene is essential because hands are the most common vehicle for transferring microbes to sterile work zones, cultures, and instruments. Washing or sanitizing before donning gloves and after removing them greatly lowers the number of microorganisms that could contaminate samples or the environment, making aseptic technique effective. Gloves help, but they don’t replace clean hands—contamination can still occur if hand hygiene is skipped or if gloves are compromised. So, hand hygiene directly reduces contamination risk, rather than having no effect, slowing workflows, or being unnecessary.