Infection control principles · USMLE Step 1

An outbreak of Pseudomonas in a burn unit is traced to contaminated sink drains. What infection control measure is most effective?

  1. Increased hand hygiene compliance
  2. Sink drain disinfection and redesign
  3. Routine systemic antibiotic prophylaxis
  4. Less frequent wound dressing changes
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Correct answer: Sink drain disinfection and redesign

Moist environments like sinks can harbor Pseudomonas. Environmental controls and disinfection are critical for prevention.

Difficulty: Medium Question 19 of 20

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