Infection Control · single question
Which of the following are classified as LOW-LEVEL disinfectants?
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Correct answer: D. Alcohol, phenol compounds (Lysol), and dilute bleach
Low-level disinfectants: alcohols, quaternary ammonium compounds, phenol derivatives (Lysol), and dilute bleach. They kill most bacteria and some viruses but NOT mycobacteria or spores.
- A. ❌ High-concentration hypochlorite and H2O2 are intermediate-to-high level.
- B. ❌ Glutaraldehyde and formaldehyde are HIGH-LEVEL disinfectants/chemical sterilants.
- C. ❌ Autoclave is sterilization, not disinfection.
- D. ✅ CORRECT – Alcohols, phenolics (Lysol), and dilute bleach are low-level disinfectants.
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