Related Experiment Videos
The Increasing Role of Acinetobacter Species As Nosocomial Pathogens
1University Paris, Faculty of Medicine Bichat, 100 bis rue du Cherche-Midi, Paris 75006, France. berezbiol@aol.com
Abstract:
Among gram-negative organisms playing a significant role in nosocomial infections, Acinetobacter species have attracted increasing attention in intensive care units during the past two decades. Acinetobacter species are implicated in a wide spectrum of infections (eg, bacteremia, nosocomial pneumonia, urinary tract infections, secondary meningitis, superinfections in burn patients). One of the most striking features of Acinetobacter species is their extraordinary ability to develop multiple resistance mechanisms against major antibiotic classes. They have become resistant to broad-spectrum beta-lactams (third-generation cephalosporins, carboxypenicillins, and increasingly to carbapenems); they produce a wide range of aminoglycoside-inactivating enzymes; and most strains are resistant to fluoroquinolones. In Acinetobacter nosocomial infections, the major problems confronting clinicians in intensive care units are related to the severity of Acinetobacter nosocomial infections and to resistance to major antibiotic classes of these organisms.
Insights
Acinetobacter species are a growing concern in intensive care units due to severe nosocomial infections. These gram-negative organisms exhibit remarkable antibiotic resistance, complicating treatment strategies.
Area of Science:
- Microbiology
- Infectious Diseases
- Critical Care Medicine
Background:
- Acinetobacter species are significant gram-negative pathogens in hospital-acquired infections, particularly in intensive care units.
- These bacteria cause a broad range of infections, including bacteremia, pneumonia, and burn wound infections.
Purpose of the Study:
- To highlight the increasing clinical challenge posed by Acinetobacter species in intensive care settings.
- To underscore the significant antibiotic resistance mechanisms developed by Acinetobacter.
Main Methods:
- This study is a review of current literature on Acinetobacter infections and antibiotic resistance.
- Analysis of reported resistance patterns against major antibiotic classes.
Main Results:
- Acinetobacter species demonstrate extensive resistance to beta-lactams, including carbapenems.
- A wide array of aminoglycoside-modifying enzymes are produced by these organisms.
- Most Acinetobacter strains exhibit resistance to fluoroquinolones.
Conclusions:
- The severity of Acinetobacter nosocomial infections, coupled with multi-drug resistance, presents a major clinical problem in intensive care units.
- Effective management strategies are urgently needed to combat these resilient pathogens.