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Updated: Jul 11, 2026

Quantification, Viability Assessment, and Visualization Strategies for Acinetobacter Biofilms
Published on: August 4, 2023
Acinetobacter infections: a growing threat for critically ill patients
M E Falagas1, E A Karveli, I I Siempos
1Alfa Institute of Biomedical Sciences (AIBS), Athens, Greece. m.falagas@aibs.gr
Abstract:
There has been increasing concern regarding the rise of Acinetobacter infections in critically ill patients. We extracted information regarding the relative frequency of Acinetobacter pneumonia and bacteraemia in intensive-care-unit (ICU) patients and the antimicrobial resistance of Acinetobacter isolates from studies identified in electronic databases. Acinetobacter infections most frequently involve the respiratory tract of intubated patients and Acinetobacter pneumonia has been more common in critically ill patients in Asian (range 4-44%) and European (0-35%) hospitals than in United States hospitals (6-11%). There is also a gradient in Europe regarding the proportion of ICU-acquired pneumonias caused by Acinetobacter with low numbers in Scandinavia, and gradually rising in Central and Southern Europe. A higher proportion of Acinetobacter isolates were resistant to aminoglycosides and piperacillin/tazobactam in Asian and European countries than in the United States. The data suggest that Acinetobacter infections are a growing threat affecting a considerable proportion of critically ill patients, especially in Asia and Europe.
Insights
Acinetobacter infections are a growing concern in intensive-care-unit (ICU) patients, particularly pneumonia and bloodstream infections in Asia and Europe. Antimicrobial resistance is also higher in these regions compared to the United States.
Area of Science:
- Critical Care Medicine
- Infectious Diseases
- Microbiology
Background:
- Rising incidence of Acinetobacter infections in critically ill patients.
- Acinetobacter species are a significant cause of hospital-acquired infections.
- Concerns over increasing antimicrobial resistance in Acinetobacter isolates.
Purpose of the Study:
- To determine the relative frequency of Acinetobacter pneumonia and bacteraemia in intensive-care-unit (ICU) patients.
- To assess the antimicrobial resistance patterns of Acinetobacter isolates.
- To compare the prevalence and resistance across different geographical regions.
Main Methods:
- Systematic review and data extraction from electronic databases.
- Analysis of studies on Acinetobacter infections in ICU patients.
- Comparison of infection rates and antimicrobial resistance data.
Main Results:
- Acinetobacter pneumonia is more prevalent in Asian (4-44%) and European (0-35%) ICUs than in US (6-11%) ICUs.
- A geographical gradient in Acinetobacter pneumonia prevalence exists within Europe.
- Higher resistance to aminoglycosides and piperacillin/tazobactam observed in Asian and European isolates compared to US isolates.
Conclusions:
- Acinetobacter infections pose a growing threat to critically ill patients, especially in Asia and Europe.
- Regional variations in Acinetobacter infection rates and antimicrobial resistance are evident.
- The findings highlight the need for targeted surveillance and antimicrobial stewardship strategies.
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