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Updated: May 29, 2026

Murine Oropharyngeal Aspiration Model of Ventilator-associated and Hospital-acquired Bacterial Pneumonia
04:32

Murine Oropharyngeal Aspiration Model of Ventilator-associated and Hospital-acquired Bacterial Pneumonia

Published on: June 28, 2018

The Evolving Etiology of Hospital-Acquired and Ventilator-Associated Pneumonia

Richard F Van Besien1, M Cristina Vazquez Guillamet2

  • 1Division of Pulmonary and Critical Care Medicine, Department of Medicine, Washington University School of Medicine, Washington University, 4490 Children's Place, St Louis, MO 63110, USA.

Clinics in Chest Medicine
|May 27, 2026
PubMed

Insights

Nosocomial pneumonia (NP) is a serious hospital threat. Emerging trends show rising antibiotic resistance and evolving diagnostic methods for better patient outcomes.

Area of Science:

  • Infectious Diseases
  • Pulmonology
  • Microbiology

Background:

  • Nosocomial pneumonia (NP), encompassing hospital-acquired and ventilator-associated pneumonia, poses a significant risk to hospitalized individuals.
  • Pathogen aspiration, altered pulmonary microbiomes, and compromised host immunity are key factors in NP development.
  • Dominant pathogens include Pseudomonas aeruginosa and Staphylococcus aureus, with a concerning increase in carbapenem-resistant gram-negative bacteria.

Purpose of the Study:

  • To review current trends in nosocomial pneumonia (NP) epidemiology.
  • To discuss the growing challenge of antibiotic resistance in NP pathogens.
  • To highlight advancements in diagnostic approaches for NP.

Main Methods:

  • Literature review of recent studies on NP.
  • Analysis of epidemiological data and antimicrobial resistance patterns.
  • Evaluation of novel diagnostic technologies, including multiplex PCR.

Main Results:

  • Pseudomonas aeruginosa and Staphylococcus aureus are common NP culprits.
  • Carbapenem-resistant gram-negative bacteria are increasingly identified, complicating treatment and increasing mortality.
  • Multiplex polymerase chain reaction (PCR) enhances pathogen identification, addressing diagnostic challenges.

Conclusions:

  • NP remains a critical concern in healthcare settings.
  • The rise of multidrug-resistant organisms necessitates updated treatment strategies.
  • Improved diagnostics are crucial for timely and accurate NP management.
Keywords:
Antimicrobial resistanceDiagnosticsEtiologyNosocomial pneumoniaVentilator-associated pneumonia

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