Ventilator-associated pneumonia
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Updated: Oct 23, 2026

Murine Oropharyngeal Aspiration Model of Ventilator-associated and Hospital-acquired Bacterial Pneumonia
Published on: June 28, 2018
F Visnegarwala1, N G Iyer, R J Hamill
1Department of Medicine, Baylor, College of Medicine, Houston, TX, USA.
Abstract:
Mechanically ventilated patients are at a substantially higher risk for developing nosocomial pneumonia. Overall, there is a relatively constant 1&!TN!150;3% risk per day of developing pneumonia while receiving mechanical ventilation. The sensitivity and specificity of clinical criteria alone for diagnosis of ventilator-associated pneumonias (VAP) is low. Several techniques have been developed to sample and quantitate the lower respiratory tract to improve the diagnostic yield. Gram-negative bacillary pneumonias account for the majority of the VAP. Strategies for prevention of VAP such as use of sucralfate for stress ulcer prophylaxis and selective decontamination of the digestive tract have been the focus of many clinical studies. Cost-effective preventive measures are needed to combat the increasing antimicrobial resistance, growing population of immunocompromised patients and increasing number of mechanically ventilated patients.
Insights
Mechanically ventilated patients face a daily risk of developing pneumonia. Early diagnosis and cost-effective prevention strategies are crucial for managing ventilator-associated pneumonia (VAP) amid rising antimicrobial resistance.
Area of Science:
- Critical Care Medicine
- Infectious Diseases
- Pulmonology
Background:
- Mechanically ventilated patients have a high risk of nosocomial pneumonia, with a daily incidence of 1-3%.
- Clinical diagnosis of ventilator-associated pneumonia (VAP) often lacks sufficient sensitivity and specificity.
- Gram-negative bacillary infections are the predominant cause of VAP.
Purpose of the Study:
- To review diagnostic techniques for lower respiratory tract infections in mechanically ventilated patients.
- To discuss current and potential VAP prevention strategies.
- To highlight the need for cost-effective VAP prevention measures.
Main Methods:
- Review of existing literature on VAP diagnosis and prevention.
- Analysis of diagnostic techniques for lower respiratory tract sampling.
- Evaluation of preventive strategies like sucralfate and selective digestive tract decontamination.
Main Results:
- Clinical criteria alone are insufficient for accurate VAP diagnosis.
- Various methods exist for sampling and quantifying lower respiratory tract infections.
- Preventive strategies, including sucralfate and selective digestive tract decontamination, have been studied.
Conclusions:
- Improved diagnostic yield is achievable through advanced sampling techniques.
- Effective VAP prevention is essential due to increasing antimicrobial resistance and immunocompromised populations.
- Cost-effective preventive measures are urgently needed to address the growing challenge of VAP.
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