Infection Control · single question
An N95 respirator filters ≥95% of airborne particles ~0.3 microns in size and is required to protect against:
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Correct answer: A. Aerosol-transmitted Mycobacterium tuberculosis
- A. Correct. An N95 filters at least 95% of 0.3-micron airborne particles and is the standard respiratory protection against aerosolized pathogens such as M. tuberculosis (and during aerosol-generating procedures).
- B. Hepatitis B is bloodborne; respiratory protection is not its primary control.
- C. MRSA is chiefly contact-transmitted; an N95 is not the key control.
- D. A standard surgical mask handles large droplets; the N95's value is filtering fine aerosols.
Note: Source stem was vague; this reconstructs the high-yield N95/TB concept.
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