Significance of air humidity and air velocity for fungal spore release into the air

Pasanen, Anna‐Liisa; Pasanen, Pertti; Jantunen, Matti; Kalliokoski, Pentti

doi:10.1016/0960-1686(91)90316-y

Cited by 169 publications

(114 citation statements)

References 6 publications

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“…Moreover aerodynamic diameter determines fungal transport in the air, and different fungal size distribution would be expected to cause different behavior in the air (Baron and Willeke, 1993). Pasanen et al (1991) reported that the minimum air velocity at which Cladosporium released spores was 1 m/s and 0.5 m/s for release of Aspergillus and Penicillium, respectively.…”

Section: Discussionmentioning

confidence: 99%

Air microbial contamination and factors affecting its occurrence in certain book libraries in Egypt.

et al. 2017

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ACTERIAL and fungal contamination in the air and settled dust .... were studied in old and new book libraries located in the National Research Center (NRC), Dokki, Giza, Egypt. The investigated libraries differ in age, design, size, ventilation type, and a number of occupants in relation to microclimatic parameters and particulate matter (PM) load. Airborne microorganisms were collected using an Andersen two stage impactor sampler. Indoor airborne bacteria and fungi ranged from 0-1060.4 CFU/m 3 and 11.8-315.6 CFU/m 3 , respectively. Outdoor airborne bacteria and fungi ranged within 11.7-2514.7 CFU/m 3 and 0-713.7 CFU/m 3 , respectively. Bacteria and fungi associated surface settled. The dust ranged from 0.4-10x10 6 CFU/gm and 0-73x10 4 CFU/gm, respectively. Fine microbial fraction (particles ≤ 8 μm in size) constituted 2-24.94% and 68.35-94.15% of the total airborne bacterial and fungal concentrations, respectively. Indoor/outdoor (I/O) ratios of airborne microorganisms were less than 1 at both libraries, indicating no indoor microbial sources. Gram positive cocci (14.3-47%) and bacilli (52.9-85.7%) were the dominant bacterial isolates in the air state, while bacilli represented 100% of the total isolates in the surface settled dust. Bacillus pseudomycoides and B. subtilis dominated indoors while B. subtilis and Staphylococcus outdoors. Aspergillus and Penicillium, were the common fungal species in both libraries under investigation. Many of the isolated fungal taxa had enzymatic activities (lipase, protease and cellulase), with A. flavus, Curvularia pallescens, Fusarium oxysporium, P. notatum and Trichoderma viride presented all enzymatic activities. Complex correlations and no-clear patterns were found between the airborne microorganisms and the environmental factors.

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Section: Discussionmentioning

confidence: 99%

Air microbial contamination and factors affecting its occurrence in certain book libraries in Egypt.

et al. 2017

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“…It is obvious that certain mold genera and actinomycetes are more potent irritants than other common indoor microorganisms (2, 79). The release of spores may also vary according to moisture and other local conditions in the growth media (85). In the future, the main focus in microbial risk assessment will probably be on the identification of microbial strains on surfaces and in construction, and less on the total count of microbial spores in indoor air.…”

Section: Discussionmentioning

confidence: 99%

Health effects of indoor-air microorganisms

Husman¹

1996

Scand J Work Environ Health

238

156

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“…Dry-discharged spore concentrations tend to be enhanced during warm, dry weather conditions, whereas actively wet discharged spores tend to be enhanced during humid conditions such as those at night and in the early morning hours (Graham et al, 2003;Elbert et al, 2007). Emission and dispersal of fungal spores can thus be selectively correlated with various meteorological parameters and usually have specific behaviours, depending on the species involved (Fitt et al, 1989;Pasanen et al, 1991;Calderon et al, 1995;Katial et al, 1997;Sabariego et al, 2000;Troutt and Levetin, 2001;Burch and Leventin, 2002;Jones and Harrison, 2004;Grinn-Gofron and Mika, 2008;Oliviera et al, 2009).…”

Section: Fungal Spores and Fragmentsmentioning

confidence: 99%

Primary biological aerosol particles in the atmosphere: a review

Després¹,

Huffman

Burrows³

et al. 2012

Tellus B: Chemical and Physical Meteorology

1,191

1,114

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A B S T R A C T Atmospheric aerosol particles of biological origin are a very diverse group of biological materials and structures, including microorganisms, dispersal units, fragments and excretions of biological organisms. In recent years, the impact of biological aerosol particles on atmospheric processes has been studied with increasing intensity, and a wealth of new information and insights has been gained. This review outlines the current knowledge on major categories of primary biological aerosol particles (PBAP): bacteria and archaea, fungal spores and fragments, pollen, viruses, algae and cyanobacteria, biological crusts and lichens and others like plant or animal fragments and detritus. We give an overview of sampling methods and physical, chemical and biological techniques for PBAP analysis (cultivation, microscopy, DNA/RNA analysis, chemical tracers, optical and mass spectrometry, etc.). Moreover, we address and summarise the current understanding and open questions concerning the influence of PBAP on the atmosphere and climate, i.e. their optical properties and their ability to act as ice nuclei (IN) or cloud condensation nuclei (CCN). We suggest that the following research activities should be pursued in future studies of atmospheric biological aerosol particles: (1) develop efficient and reliable analytical techniques for the identification and quantification of PBAP; (2) apply advanced and standardised techniques to determine the abundance and diversity of PBAP and their seasonal variation at regional and global scales (atmospheric biogeography); (3) determine the emission rates, optical properties, IN and CCN activity of PBAP in field measurements and laboratory experiments; (4) use field and laboratory data to constrain numerical models of atmospheric transport, transformation and climate effects of PBAP.

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Significance of air humidity and air velocity for fungal spore release into the air

Cited by 169 publications

References 6 publications

Air microbial contamination and factors affecting its occurrence in certain book libraries in Egypt.

Air microbial contamination and factors affecting its occurrence in certain book libraries in Egypt.

Health effects of indoor-air microorganisms

Primary biological aerosol particles in the atmosphere: a review

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