Swab Testing to Optimize Pneumonia Treatment With Empiric Vancomycin: A Randomized Controlled Trial.
Clin Infect DisSep 2, 2026
Jeffrey A Freiberg, Edward T Qian, Kylie G Nairon et al.
✦ AI-curated · Sources linked
In 30 seconds
This randomized controlled trial evaluated the impact of MRSA PCR nasal swab testing on vancomycin use in 277 adult ICU patients with suspected community-acquired pneumonia. The study found no significant difference in vancomycin-free hours alive between the intervention group (109.7 hours) and the control group (105.7 hours; P = .458), despite a high negative predictive value of 98.9% for the PCR test.
Key findings
- The intervention group had 109.7 vancomycin-free hours alive compared to 105.7 in the control group.
- The MRSA PCR nasal swab testing showed a negative predictive value of 98.9%.
- No reduction in 30-day mortality was observed with the use of MRSA PCR testing.
Why it matters
The findings suggest that while MRSA PCR testing is highly accurate, it does not effectively reduce vancomycin use or improve outcomes in critically ill patients with suspected pneumonia, highlighting the need for improved antimicrobial stewardship.