Related Experiment Video

Updated: Jun 26, 2026

Microbiological Rapid On-Site Evaluation for Pulmonary Infectious Diseases
03:22

Microbiological Rapid On-Site Evaluation for Pulmonary Infectious Diseases

Published on: March 1, 2024

[Respiratory tract fluid microbiology in an intensive care unit]

Luis Javier Casanova-Cardiel1, Jorge Alberto Castañón-González, Marco Antonio León-Gutiérrez

  • 1Unidad de Cuidados Intensivos y Medicina Crítica, Hospital de Especialidades, Centro Médico Nacional Siglo XXI, Instituto Mexicano del Seguro Social, Distrito Federal, México. hinfecto@hotmail.com

Revista Medica Del Instituto Mexicano Del Seguro Social
|January 10, 2009
PubMed
Abstract

Insights

High rates of multidrug-resistant Pseudomonas aeruginosa and methicillin-resistant Staphylococcus aureus were found in Intensive Care Unit tracheal aspirates. Surveillance identified resistance patterns and challenges in ventilator-associated pneumonia reporting.

Area of Science:

  • Clinical Microbiology
  • Infectious Diseases
  • Critical Care Medicine

Context:

  • Intensive Care Units (ICUs) are prone to high rates of healthcare-associated infections.
  • Antimicrobial resistance (AMR) poses a significant threat to patient outcomes in critical care settings.
  • Understanding resistance patterns is crucial for effective treatment and infection control.

Purpose:

  • To determine the antimicrobial resistance patterns of bacterial isolates from tracheal aspirates in an ICU.
  • To evaluate ventilator-associated pneumonia (VAP) cases and reporting discrepancies.
  • To identify common pathogens and their resistance profiles in the ICU environment.

Summary:

  • Pseudomonas aeruginosa (26%) and Staphylococcus (24%) were the most frequent isolates from tracheal aspirates.
  • High proportions of multidrug-resistant P. aeruginosa (53%) and methicillin-resistant Staphylococcus aureus (MRSA) (70%) were observed.
  • Candida species accounted for 17% of isolates; Enterobacteriaceae, Acinetobacter sp., and S. maltophilia were less common.

Impact:

  • The study highlights a significant prevalence of multidrug-resistant organisms in the ICU, necessitating targeted antimicrobial stewardship.
  • Discrepancies in VAP case reporting between surveillance teams and clinicians indicate potential areas for improved communication and diagnostic accuracy.
  • Findings inform infection prevention strategies and empirical antibiotic selection in critical care.

More Related Videos

The WinCF Model - An Inexpensive and Tractable Microcosm of a Mucus Plugged Bronchiole to Study the Microbiology of Lung Infections06:57

The WinCF Model - An Inexpensive and Tractable Microcosm of a Mucus Plugged Bronchiole to Study the Microbiology of Lung Infections

Published on: May 8, 2017

Related Concept Videos

Microbiota of the Respiratory Tract01:29

Microbiota of the Respiratory Tract

The human respiratory tract, comprising the upper and lower segments, serves as a critical interface with the external environment. The upper respiratory tract (URT)—including the nostrils, sinuses, pharynx, and oropharynx—is heavily colonized by microbes, while the lower respiratory tract (LRT), composed of the larynx, trachea, bronchi, and lungs, was long thought to be sterile. However, recent molecular studies have revealed that the lungs are not devoid of microbes but act more like...
Acute Respiratory Failure-V01:29

Acute Respiratory Failure-V

The treatment for acute respiratory failure varies based on factors like the underlying cause, overall health, and severity. A collaborative healthcare team is essential for early detection, often through arterial blood gas analysis. Identifying the cause is the primary goal, with treatment strategies adjusted for ventilation/perfusion (V/Q) mismatch, shunting, or diffusion impairment.
Ensure that patients are monitored continuously for their response to therapy, including changes in...
Pneumonia IV: Management01:28

Pneumonia IV: Management

The treatment of pneumonia varies based on its severity and the causative pathogen. Here is a structured approach to managing pneumonia, integrating pharmaceutical and supportive care strategies.
Bacterial Pneumonia Treatment
For bacterial pneumonia, antibiotics serve as the cornerstone of therapy. Initial treatment often begins with empirical antibiotics, tailored to the anticipated causative organism and adjusted based on culture results. Key antibiotic choices include:
Pneumonia I: Introduction01:29

Pneumonia I: Introduction

Pneumonia is an infection of the lower respiratory tract that leads to inflammation of the lung parenchyma, often resulting in the accumulation of inflammatory exudate in the alveoli and airways. Unlike the watery, low-protein fluid exudate in pulmonary edema, the exudate in this case is a thick fluid rich in immune cells, proteins, and debris produced during infection and inflammation.This impairs gas exchange and can lead to consolidation of lung tissue. The infection may be caused by a...
Pneumonia I: Introduction01:30

Pneumonia I: Introduction

Pneumonia is an acute respiratory infection that targets the lungs, specifically the alveoli. These tiny air sacs, essential for oxygen exchange, become engorged with pus and fluid, severely hindering breathing, decreasing oxygen absorption, and causing significant pain and discomfort during respiration.
Risk Factors
Various factors influence the likelihood of developing pneumonia. Age plays a crucial role, with infants, children under two, and individuals over 65 at increased risk due to their...
Pneumonia V: Nursing management and Prevention01:30

Pneumonia V: Nursing management and Prevention

Nursing management of pneumonia involves promoting airway patency, facilitating rest and conserving energy, encouraging fluid intake, maintaining nutrition, and educating patients.
The nurse must practice strict medical asepsis and adhere to infection control guidelines to minimize healthcare-associated infections.
Enhance airway patency
Position the patient correctly to facilitate drainage of the affected lung segments. Manual or mechanical percussion and vibration can also be employed.