Respiratory failure & ventilation

Efficacy and Safety of Systemic Prophylactic Antibacterials in Mechanically Ventilated Patients: Systematic Review and Meta-Analysis

Crit Care MedPublished Systematic review and meta-analysis of randomised trials

Pooled result · Incidence of VAPResult — go to the resultRelative risk 0.65 95% CI 0.55–0.77

Authors' conclusion

The systemic prophylactic antibacterials probably reduces early VAP and overall VAP incidence in mechanically ventilated patients, but probably does not reduce in-hospital mortality.

Study context

Population
Mechanically ventilated patients in ICUs
Participants
5,562 participants · 11 randomized controlled trials (RCTs)
Comparison
Systemic prophylactic antibacterials vs no prophylaxis
Outcome
Incidence of VAP
Methodological detailsGRADE certainty assessment
  • GRADE certainty assessment

Pooled result

As reported in the abstract

Relative risk

0.65

95% CI 0.55–0.77

Systemic prophylactic antibacterials vs Control
RR 0.65 (95% CI 0.55–0.77)

Further pooled results

OutcomeRR (95% CI)
Incidence of early VAPModerate certainty0.52 (0.41–0.66)
In-hospital mortalityModerate certainty0.85 (0.68–1.06)
OutcomeMD (95% CI)
Duration of mechanical ventilationModerate certainty−0.32 (−0.79 to 0.16)
Hospital LOSLow certainty−1.56 (−5.15 to 2.02)

Ventilator-associated pneumonia (VAP), brain injury patients (subgroup)

Systemic prophylactic antibacterials probably reduce VAP in brain injury patients

Safety

Drug resistance and adverse events

No increased risk observed

Original publication

Efficacy and Safety of Systemic Prophylactic Antibacterials in Mechanically Ventilated Patients: Systematic Review and Meta-Analysis. Crit Care Med. Published 1 June 2026. doi:10.1097/ccm.0000000000007183

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