Use of temporal/seasonal- and size-dependent bioaerosol data to characterize the contribution of outdoor fungi to residential exposures
Resource
Science of The Total Environment 347 (1-3): 78-97
Journal
The Science of The Total Environment
Pages
78-97
Date Issued
2005
Date
2005
Author(s)
Luo, Wen-Chang
Abstract
With the use of published temporal/seasonal and particle size distribution of outdoor bioaerosol data and meteorological information in the subtropical climate, we characterized the airborne fungal concentration indoor/outdoor/ personal exposure relationships in a wind-induced naturally ventilated residence. We applied a size-dependent indoor/outdoor ratio model coupled with a compartmental lung model based on a hygroscopic growth factor as a function of relative humidity on aerodynamic diameter and concentration of fungal spores. The higher indoor airborne fungal concentrations occurred in early morning and late afternoon in which median values were 699.29 and 626.20 CFU m-3 in summer as well as 138.71 and 99.01 CFU m-3 in winter, respectively, at 2 am and 8 pm. In the absence of indoor sources, summer has higher mean indoor/outdoor ratios of airborne fungal concentration (0.29-0.58) than that in winter (0.12-0.16). Lung region of extrathoracic (ET) has higher fungal concentration lung/indoor ratios (0.7-0.8) than that in bronchial (BB; 0.41-0.60), bronchiolar (bb; 0.12-0.40), and alveolar-interstitial (AI); 0.01-0.24) regions. The highest airborne fungal deposition dose (95th-percentile is 4600 CFU) occurred in 11 pm-5 am in region AI in that the 95th-percentile fungal deposition rate was 0.22 CFU s-1. © 2004 Elsevier B.V. All rights reserved.
Subjects
Airborne fungus; Bioaerosol; Humidity; Hygroscopic; Inhalation dose; Natural ventilation
SDGs
Other Subjects
Aerosols; Climatology; Indoor air pollution; Microbiology; Particle size analysis; Respiratory system; Airborne fungal concentration; Fungal deposition; Outdoor bioaerosol; Subtropical climate; Fungi; fungus; aerosol; air conditioning; air pollution; airborne particle; ambient air; article; atmospheric deposition; climate; compartment model; environmental exposure; fungal contamination; fungus spore; humidity; indoor air pollution; lung interstitium; lung model; meteorological phenomena; particle size; priority journal; seasonal variation; summer; wind; winter; Aerosols; Air Microbiology; Air Pollution, Indoor; Colony Count, Microbial; Environmental Monitoring; Fungi; Housing; Humans; Humidity; Lung; Models, Biological; Particle Size; Seasons; Temperature; Time Factors; Ventilation; Wind; Fungi
Type
journal article
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