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Randomized Controlled Trial
. 2025 Aug;51(8):1417-1430.
doi: 10.1007/s00134-025-08014-9. Epub 2025 Jul 15.

Combined use of a multiplex PCR and serum procalcitonin to reduce antibiotic exposure in critically ill patients with community-acquired pneumonia: the MULTI-CAP randomized controlled trial

Collaborators, Affiliations
Randomized Controlled Trial

Combined use of a multiplex PCR and serum procalcitonin to reduce antibiotic exposure in critically ill patients with community-acquired pneumonia: the MULTI-CAP randomized controlled trial

Guillaume Voiriot et al. Intensive Care Med. 2025 Aug.

Abstract

Purpose: Multiplex polymerase chain reaction (mPCR) testing has the potential to rapidly and accurately identify causative microorganisms in patients with community-acquired pneumonia (CAP). Its use in a management strategy, along with biomarkers, may reduce antibiotic exposure and improve clinical outcomes.

Methods: The MULTI-CAP trial was a multicenter (n = 20), parallel-group, superiority, open-label, randomized trial. Subjects were non-immunocompromised adult patients (≥ 18 years) admitted to the intensive care unit (ICU) for CAP and randomly assigned in a 1:1 ratio. In the intervention group, the microbiological diagnosis combined a broad-spectrum respiratory mPCR and conventional microbiological investigations. An algorithm for early discontinuation or de-escalation of antibiotics was applied, based on mPCR results and serum procalcitonin. In the control group, only conventional microbiological investigations were performed. In both groups, antibiotic discontinuation was considered on Day 3 and day after day until Day 7, based on procalcitonin values and kinetics. The primary endpoint was defined as the number of days alive without any antibiotic from the time of enrollment to Day 28.

Results: From October 4, 2018, to March 3, 2022, 406 patients were randomized, and 385 were evaluable in the intention-to-treat analysis. The median number of days alive without antibiotics on Day 28 was 19.0 (0.0; 24.0) days in the intervention group and 19.0 (7.0; 22.0) days in the control group (difference, 0.0 (95% CI, - 4.0 to 4.0). However, the antibiotic cumulative duration on day 28 was 3 days shorter (95% CI, - 5.1 to - 0.9) in the intervention group. Serious adverse events did not differ between groups.

Conclusion: In ICU patients with CAP, a management strategy combining a mPCR and serum procalcitonin failed to reduce antibiotic exposure or improve outcomes on Day 28, compared to usual care.

Trial registration number: NCT03452826 (March 2018), EudraCT 2017-A01615-48.

Keywords: Community-acquired pneumonia; Critically ill; Intensive care medicine; Molecular diagnosis.

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Conflict of interest statement

Declarations. Conflicts of interest: Laurence Armand-Lefèvre received consulting fees from Shionogi and Viatris, and honoraria for lectures from Advanz, Shionogi and Pfizer. In addition, she performed unpaid lectures for BioMérieux and Qiagen. Julien Dessajan received honoraria for lectures from BioMérieux. Isabelle Durand-Zaleski received consulting fees from Bristol Myers Squibb, MSD, Sanofi, Pfizer and Roche. Muriel Fartoukh reported research grants from BioMérieux and personal fees from BioMérieux, Pfizer, SOS Oxygene and Fisher and Paykel. Tabassome Simon reported support for research from BioMérieux, research grants from Astra Zeneca, Bayer, Boehringer, Daiichi Sankyo, Ili-Lilly, GSK, Novartis and Sanofi, and honoraria for lectures from Servier and Novartis. In addition, she reported participation in Data Safety Monitoring Board for Ablative Solutions, Air Liquide, Astra Zeneca, Sanofi, Novartis and 4Living Biotech. Jean-Francois Timsit Simon reported support for research from BioMérieux, and consulting fees from Advanz, Menarini, Pfizer and Merck. In addition, he reported honoraria for lectures from BioMérieux, MundiPharma and Merck. Guillaume Voiriot reported research grants from BioMérieux and SOS Oxygene, and support for attending meetings from Oxyvie. Francois Vandenesch reported been founder and shareholder of Weezion.

References

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