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Risk assessment of legionellosis in cardiology units

P Laganà1, S Delia1, E Avventuroso1

  • 1Department of Biomedical and Dental Sciences and Morphofunctional Imaging. University Hospital of Messina, Italy.

Journal of Preventive Medicine and Hygiene
|September 14, 2017
PubMed

Insights

Legionella bacteria were detected in hospital water and air samples from cardiology units. This highlights the critical need for enhanced environmental monitoring in high-risk healthcare settings to prevent infective endocarditis.

Area of Science:

  • Medical Microbiology
  • Infectious Diseases
  • Hospital Epidemiology

Background:

  • Infective Endocarditis (IE) presents significant morbidity and mortality.
  • Emerging Gram-negative bacteria, including Legionella, are increasingly identified as causative agents.
  • Hospital environments pose a risk for healthcare-associated infections.

Purpose of the Study:

  • To investigate the presence of Legionella in environmental samples within hospital cardiology units.
  • To assess the potential risk of Legionella transmission in these high-risk areas.
  • To emphasize the importance of environmental surveillance for preventing IE.

Main Methods:

  • Environmental sampling of water and air was conducted in two hospital cardiology units.
  • A total of 80 samples were analyzed: 55 water and 25 aerosol samples.
  • Standard microbiological techniques were employed for Legionella isolation and identification.

Main Results:

  • Legionella was detected in 30% of the analyzed water samples.
  • Legionella was detected in 15% of the analyzed aerosol samples.
  • These findings indicate a notable environmental presence of Legionella in the studied units.

Conclusions:

  • The study confirms Legionella contamination in hospital water and air systems.
  • Increased environmental monitoring is crucial, particularly in high-risk cardiology wards.
  • Proactive surveillance can mitigate the risk of Legionella-associated infective endocarditis.
Keywords:
Cardiac valve prosthesisEnvironmentInfective endocarditisLegionella

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