Correct!
5.  All of the above

In summary, this patient experienced high-grade bacteremia, and nearly simultaneous onset of purulent pericarditis and necrotizing pneumonia due to MRSA. The onset of symptoms and radiographic signs (small lung nodules seen in Figure 2) of MRSA infection, occurring within 24 hours of discharge after inpatient treatment of a Crohn’s flair, strongly suggest a nosocomial infection originating during the initial hospitalization. 

Which of the following are possible iatrogenic origins of MRSA infection? (click on the correct answer to be directed to the sixth and final page)

1. Catheter-associated blood stream infection
2. Aspiration during sedation for endoscopy
3. Endoscopy with a contaminated endoscope
4. MRSA contamination of propofol
5. All the above

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