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Updated: Oct 4, 2026

Rapid and Specific Detection of Acinetobacter baumannii Infections Using a Recombinase Polymerase Amplification/Cas12a-based System
07:59

Rapid and Specific Detection of Acinetobacter baumannii Infections Using a Recombinase Polymerase Amplification/Cas12a-based System

Published on: April 25, 2025

Severe community-acquired pneumonia due to Acinetobacter baumannii

M Z Chen1, P R Hsueh, L N Lee

  • 1Department of Internal Medicine, National Taiwan University Hospital, National Taiwan University College of Medicine, Taipei, Taiwan.

Chest
|October 10, 2001
PubMed
Abstract

Insights

Community-acquired pneumonia (CAP) caused by Acinetobacter baumannii is severe, often presenting with septic shock and respiratory failure, especially in warmer months. Early diagnosis via sputum smear and combination antibiotic therapy may improve outcomes for this serious infection.

Area of Science:

  • Infectious Diseases
  • Pulmonology
  • Microbiology

Background:

  • Community-acquired pneumonia (CAP) can be caused by various pathogens.
  • Acinetobacter baumannii is an opportunistic pathogen that can cause severe pneumonia.
  • Understanding the characteristics of A. baumannii CAP is crucial for effective management.

Purpose of the Study:

  • To investigate the clinical, epidemiologic, and microbiological features of CAP caused by Acinetobacter baumannii.
  • To identify risk factors and outcomes associated with A. baumannii CAP.
  • To evaluate potential treatment strategies for A. baumannii CAP.

Main Methods:

  • Retrospective review of patient charts and radiographic findings.
  • Inclusion criteria: patients admitted with CAP and positive A. baumannii cultures from blood or pleural fluid.
  • Data collected included patient demographics, comorbidities, clinical presentation, microbiological results, and outcomes.

Main Results:

  • Thirteen patients met the criteria, with common comorbidities including alcoholism, malignancy, and diabetes.
  • Most cases occurred during warmer months (April-October).
  • Patients often presented with fulminant disease, septic shock, respiratory failure, and required ICU admission and mechanical ventilation. Mortality was high (62%).

Conclusions:

  • Acinetobacter baumannii should be considered in cases of severe lobar pneumonia, particularly in younger alcoholics during warmer months.
  • Early diagnosis aided by sputum Gram stain is important.
  • Combination therapy with a third-generation cephalosporin and an aminoglycoside may be effective empirical treatment.

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