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Could we predict airborne Aspergillus contamination during construction work?

B Pilmis1, V Thepot-Seegers2, C Angebault3

  • 1Université Paris Descartes, Service de Maladies Infectieuses et Tropicales, Centre d'infectiologie Necker-Pasteur, IHU Imagine, Hôpital Necker-Enfants Malades, Assistance Publique-Hôpitaux de Paris, Paris, France; Université Paris Descartes, Equipe transversale d'infectiologie, IHU Imagine, Hôpital Necker-Enfants Malades, Assistance Publique-Hôpitaux de Paris, Paris, France.

American Journal of Infection Control
|September 26, 2016
PubMed
Summary
This summary is machine-generated.

Hospital construction can increase airborne Aspergillus, a dangerous fungus. Demolition work, especially in warmer months, significantly raises mold concentrations, necessitating careful timing to prevent infections.

Keywords:
Airborne contaminationAspergillusConstruction worksInfection control

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Area of Science:

  • Environmental microbiology
  • Hospital epidemiology
  • Public health

Background:

  • Aspergillus fumigatus is a significant opportunistic pathogen causing hospital-acquired infections.
  • Hospital outbreaks of invasive aspergillosis are linked to construction and demolition activities.

Purpose of the Study:

  • To investigate the influence of meteorological factors on outdoor fungal airborne concentrations.
  • To assess the impact of different construction work phases on fungal spore levels.

Main Methods:

  • Prospective external air sampling conducted thrice weekly during hospital construction phases.
  • Daily collection of meteorological parameters.
  • Analysis of 201 air samples for fungal and Aspergillus spp. concentrations.

Main Results:

  • Fungi were detected in 80.1% of samples, with a median Aspergillus spp. concentration of 16 CFU/m³.
  • Demolition activities led to a significant increase in mold colony counts.
  • Construction type and temperature were associated with overall fungi concentration; higher temperatures correlated with elevated Aspergillus spp. levels.

Conclusions:

  • Environmental surveillance is crucial in healthcare settings undergoing construction.
  • Recommendations suggest scheduling demolition work during cooler seasons (winter and fall) to minimize airborne fungal exposure.