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Updated: Sep 7, 2025
Murine Oropharyngeal Aspiration Model of Ventilator-associated and Hospital-acquired Bacterial Pneumonia
Published on: June 28, 2018
Nosocomial Pneumonia in the Mechanically Ventilated Patient
Jonathon Fanning1,2,3,4,5, Mauro Panigada6, Gianluigi Li Bassi1,2,4,7,8,9
1Critical Care Research Group, The Prince Charles Hospital, Brisbane, Australia.
Abstract:
Ventilator-associated pneumonia (VAP) is a common complication occurring in critically ill patients who are mechanically ventilated and is the leading cause of nosocomial infection-related death. Etiologic agents for VAP widely differ based on the population of intensive care unit patients, duration of hospital stay, and prior antimicrobial therapy. VAP due to multidrug-resistant pathogens is associated with the highest morbidity and mortality, likely due to delays in appropriate antimicrobial treatment. International guidelines are currently available to guide diagnostic and therapeutic strategies. VAP can be prevented through various pharmacological and non-pharmacological interventions, which are more effective when grouped as bundles. When VAP is clinically suspected, diagnostic strategies should include early collection of respiratory samples to guide antimicrobial therapy. Empirical treatment should be based on the most likely etiologic microorganisms and antibiotics likely to be active against these microorganisms. Response to therapy should be reassessed after 3 to 5 days and antimicrobials adjusted or de-escalated to reduce the burden of the disease. Finally, considering that drug resistance is increasing worldwide, several novel antibiotics are being tested to efficiently treat VAP in the coming decades.
Insights
Ventilator-associated pneumonia (VAP) is a critical care complication. Prompt diagnosis and tailored antibiotic therapy are key to improving outcomes and reducing mortality from this common hospital-acquired infection.
Area of Science:
- Critical Care Medicine
- Infectious Diseases
- Pulmonology
Background:
- Ventilator-associated pneumonia (VAP) is a significant cause of mortality in mechanically ventilated patients.
- The specific pathogens causing VAP vary, with multidrug-resistant organisms posing the greatest threat.
- Effective management strategies are crucial to combatting VAP and its associated morbidity.
Purpose of the Study:
- To review current diagnostic and therapeutic strategies for VAP.
- To emphasize the importance of early diagnosis and appropriate antimicrobial selection.
- To discuss prevention methods and future treatment directions for VAP.
Main Methods:
- Review of international guidelines for VAP diagnosis and treatment.
- Discussion of etiological factors influencing VAP.
- Analysis of current and emerging antimicrobial strategies.
Main Results:
- VAP management requires tailored approaches based on patient population and local resistance patterns.
- Early respiratory sample collection and targeted antimicrobial therapy improve outcomes.
- Bundled interventions are effective for VAP prevention.
Conclusions:
- Optimizing VAP diagnosis and treatment is essential for reducing patient mortality.
- Antimicrobial stewardship and the development of new agents are critical for future VAP control.
- Multidrug-resistant pathogens necessitate vigilant monitoring and adaptive therapeutic strategies.
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