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Persistent Acinetobacter baumannii? Look inside your medical equipment
A T Bernards1, H I J Harinck, L Dijkshoorn
1Department of Medical Microbiology, Leiden University Medical Center, Leiden, The Netherlands.
Infection Control and Hospital Epidemiology
|November 30, 2004
Summary
Two multidrug-resistant Acinetobacter baumannii outbreaks were traced to contaminated medical equipment. Thorough cleaning and filter replacement of respiratory ventilators and hemofiltration machines successfully ended the hospital-acquired infections.
Area of Science:
- Infectious Diseases
- Hospital Epidemiology
- Microbiology
Background:
- Multidrug-resistant Acinetobacter baumannii (MDRAB) poses a significant threat in healthcare settings.
- Hospital-acquired infections (HAIs) due to MDRAB can lead to severe patient outcomes.
Purpose of the Study:
- To identify the source of two MDRAB outbreaks within a hospital.
- To determine effective control measures for MDRAB transmission via medical equipment.
Main Methods:
- Epidemiological investigation to trace the source of infection.
- Environmental sampling and microbial analysis of potentially contaminated medical devices.
- Implementation of enhanced cleaning protocols and equipment maintenance.
Main Results:
- The outbreak strains of Acinetobacter baumannii were isolated from respiratory ventilators and continuous veno-venous hemofiltration (CVVH) machines.
- Dust accumulation on the identified medical equipment was a key factor in pathogen persistence.
- Cleaning procedures and dust filter replacement effectively eliminated the source of transmission.
Conclusions:
- Medical equipment, specifically ventilators and CVVH machines, can serve as reservoirs for multidrug-resistant Acinetobacter baumannii.
- Rigorous environmental cleaning and maintenance, including dust removal and filter replacement, are critical for controlling MDRAB outbreaks.
- Proactive infection control measures targeting equipment hygiene are essential in preventing hospital-acquired infections.