Infection Control · single question
An engineering measure to prevent aerosol transmission of pathogens in the dental office:
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Correct answer: D. Appropriate ventilation and air filtration systems
- A. Hands-free sanitizing stations are engineering measures for CONTACT transmission prevention — not specifically for aerosol transmission.
- B. Patient screening is an ADMINISTRATIVE CONTROL, not an engineering control. Engineering controls modify the physical environment itself.
- C. N95 masks are PPE (Personal Protective Equipment) — at the BOTTOM of the OSHA hierarchy of controls, not an engineering control.
- D. VENTILATION and AIR FILTRATION (HEPA filters, negative pressure rooms, appropriate air changes per hour) are ENGINEERING CONTROLS for aerosol transmission prevention. Engineering controls modify the environment — they are more effective and reliable than administrative controls (PPE policies, scheduling) or PPE alone.
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