Related Experiment Video

Updated: Jun 10, 2026

The Utilization of Oropharyngeal Intratracheal PAMP Administration and Bronchoalveolar Lavage to Evaluate the Host Immune Response in Mice
12:27

The Utilization of Oropharyngeal Intratracheal PAMP Administration and Bronchoalveolar Lavage to Evaluate the Host Immune Response in Mice

Published on: April 2, 2014

[Intrapulmonary inflammatory response in critically ill patients with pneumonia]

A Estella1

  • 1Servicio de Medicina Intensiva, Hospital SAS de Jerez, Jerez de la Frontera, Cádiz, España. litoestella@hotmail.com

Medicina Intensiva
|August 13, 2010
PubMed
Abstract

Insights

This study found that higher levels of tumor necrosis factor-alpha (TNFα) in bronchoalveolar lavage fluid correlate with positive bacterial cultures in mechanically ventilated patients. This association persists even after prior antibiotic therapy, suggesting TNFα as a potential biomarker.

Area of Science:

  • Critical Care Medicine
  • Infectious Diseases
  • Immunology

Context:

  • Pneumonia is a common complication in mechanically ventilated patients.
  • Accurate diagnosis of pneumonia in this population is challenging.
  • Bronchoalveolar lavage (BAL) is a key diagnostic tool.

Purpose:

  • To investigate the relationship between microbiological findings and cytokine profiles in BAL fluid.
  • To determine if specific cytokines correlate with the presence of infection in mechanically ventilated patients.
  • To assess the utility of cytokines as biomarkers for pneumonia.

Summary:

  • A prospective study analyzed BAL fluid from 59 mechanically ventilated patients with suspected pneumonia.
  • Microbiological cultures and cytokine levels (IL-6, IL-8, TNFα, G-CSF, GM-CSF) were measured.
  • A significant correlation was observed between positive BAL cultures and elevated TNFα levels, even in patients with prior antibiotic treatment.

Impact:

  • Findings suggest TNFα may serve as a valuable biomarker for identifying bacterial pneumonia in mechanically ventilated patients.
  • This could aid in earlier and more accurate diagnosis and treatment decisions.
  • Further research could explore TNFα's role in guiding antibiotic therapy and predicting patient outcomes.

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