Non-Seasonal Variation of Airborne Aspergillus Spore Concentration in a Hospital Building.

Abstract:

:Nosocomial fungal infections are gaining increased attention from infectiologists. An adequate investigation into the levels of airborne Aspergillus and other fungal spores in hospital settings, under normal conditions, is largely unknown. We monitored airborne spore contamination in a Swiss hospital building in order to establish a seasonally-dependent base-line level. Air was sampled using an impaction technique, twice weekly, at six different locations over one year. Specimens were seeded in duplicate on Sabouraud agar plates. Grown colonies were identified to genus levels. The airborne Aspergillus spore concentration was constantly low throughout the whole year, at a median level of 2 spores/m³ (inter-quartile range = IQR 1-4), and displayed no seasonal dependency. The median concentration of other fungal spores was higher and showed a distinct seasonal variability with the ambient temperature change during the different seasons: 82 spores/m³ (IQR 26-126) in summer and 9 spores/m³ (IQR 6-15) in winter. The spore concentration varied considerably between the six sampling sites in the building (10 to 26 spores/m³). This variability may explain the variability of study results in the literature.

authors

Oberle M,Reichmuth M,Laffer R,Ottiger C,Fankhauser H,Bregenzer T

doi

10.3390/ijerph121113730

subject

Has Abstract

pub_date

2015-10-28 00:00:00

pages

13730-8

issue

11

eissn

1661-7827

issn

1660-4601

pii

ijerph121113730

journal_volume

12

pub_type

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