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Combination antibiotic therapy with macrolides improves survival in intubated patients with community-acquired
I Martin-Loeches1, T Lisboa, A Rodriguez
1Critical Care Department, Mater Misericordiae University Hospital, Dublin, Ireland.
Objective:
To assess the effect on survival of macrolides or fluoroquinolones in intubated patients admitted to the intensive care unit (ICU) with severe community-acquired pneumonia (severe CAP).
Methods:
Prospective, observational cohort, multicenter study conducted in 27 ICUs of 9 European countries. Two hundred eighteen consecutive patients requiring invasive mechanical ventilation for an admission diagnosis of CAP were recruited.
Results:
Severe sepsis and septic shock were present in 165 (75.7%) patients. Microbiological documentation was obtained in 102 (46.8%) patients. ICU mortality was 37.6% (n = 82). Non-survivors were older (58.6 +/- 16.1 vs. 63.4 +/- 16.7 years, P < 0.05) and presented a higher score on the simplified Acute Physiology Score II at admission (45.6 +/- 15.4 vs. 50.8 +/- 17.5, P < 0.05). Monotherapy was given in 43 (19.7%) and combination therapy in 175 (80.3%) patients. Empirical antibiotic therapy was in accordance with the 2007 Infectious Diseases Society of America (IDSA)/American Thoracic Society (ATS) guidelines in 100 (45.9%) patients (macrolides in 46 patients and fluoroquinolones in 54). In this cohort, a Cox regression analysis adjusted by severity identified that macrolide use was associated with lower ICU mortality (hazard ratio, HR 0.48, confidence intervals, 95% CI 0.23-0.97, P = 0.04) when compared to the use of fluoroquinolones. When more severe patients presenting severe sepsis and septic shock were analyzed (n = 92), similar results were obtained (HR 0.44, 95% CI 0.20-0.95, P = 0.03).
Conclusions:
Patients with severe community-acquired pneumonia had a low adherence with the 2007 IDSA/ATS guidelines. Combination therapy with macrolides should be preferred in intubated patients with severe CAP.
Insights
Macrolide use in intubated patients with severe community-acquired pneumonia (severe CAP) was associated with lower intensive care unit (ICU) mortality compared to fluoroquinolones. Combination therapy with macrolides is recommended for severe CAP patients.
Area of Science:
- Critical Care Medicine
- Infectious Diseases
- Pharmacology
Background:
- Severe community-acquired pneumonia (severe CAP) is a significant cause of mortality in intensive care units (ICUs).
- Optimal antibiotic selection for intubated patients with severe CAP remains a critical clinical question.
Purpose of the Study:
- To evaluate the comparative survival impact of macrolides versus fluoroquinolones in mechanically ventilated patients diagnosed with severe CAP.
- To assess adherence to established clinical guidelines for empirical antibiotic therapy in this patient population.
Main Methods:
- A prospective, observational, multicenter cohort study involving 218 intubated patients with severe CAP across 27 European ICUs.
- Utilized Cox regression analysis to adjust for patient severity and compare mortality rates between macrolide and fluoroquinolone treatment groups.
Main Results:
- ICU mortality was 37.6%. Macrolide use was significantly associated with reduced ICU mortality (HR 0.48) compared to fluoroquinolones, even in patients with severe sepsis or septic shock.
- Empirical antibiotic therapy aligned with 2007 Infectious Diseases Society of America (IDSA)/American Thoracic Society (ATS) guidelines in only 45.9% of cases.
Conclusions:
- Adherence to 2007 IDSA/ATS guidelines for severe CAP management was suboptimal.
- Combination therapy incorporating macrolides should be prioritized for intubated patients with severe CAP to improve survival outcomes.
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