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Association of asthma symptoms and severity with indoor bioaerosols.

Authors
Ross-MA; Curtis-L; Scheff-PA; Hryhorczuk-DO; Ramakrishnan-V; Wadden-RA; Persky-VW
Source
Allergy 2000 Aug; 55(8):705-711
NIOSHTIC No.
20029882
Abstract
BACKGROUND: In this study, repeated measurements were made of levels of mold spores, bacteria, and dust-mite allergens over a 7-month period in the homes of asthmatics, and relationships with measures of asthma severity were evaluated. METHODS: A sample of 57 asthmatic individuals, living in 44 homes in East Moline, Illinois, and nearby communities, participated in a panel study. The homes were visited up to nine times during the study to collect air and dust samples. Asthma severity indicators were derived from questionnaire data and from the daily health records from the panel study. Associations between indoor levels of mold spores, bacteria, and dust-mite allergens were tested with several asthma severity indicators. RESULTS: There was evidence of associations between all asthma severity measures and levels of total and gram-negative bacteria, but mold-spore abundance was associated only with emergency room (ER) visits for asthma. No significant associations were found with house-dust-mite allergen and any of the asthma severity indicators, but the levels of dust-mite allergen were low, with median concentrations of 0.18 microg/g dust Der f 1 and 0.19 microg/g dust Der p 1. CONCLUSIONS: Some evidence was found for associations of increased concentrations of gram-negative bacteria and mold spores with asthma severity, particularly with ER visits. No association was found between house-dust-mite allergen and asthma severity indicators; however, the mite-allergen levels in the study homes were generally well below the proposed threshold level of 2 microg/g dust.
Keywords
Pulmonary-system-disorders; Lung-disorders; Mortality-rates; Mortality-data; Humans; Racial-factors; Age-factors; Bronchial-asthma; Respiratory-system-disorders; Bacteria; Bacterial-dusts; Molds
Contact
Office of Air Quality Planning and Standards, US Environmental Protection Agency, Research Triangle Park, NC 27711
CODEN
LLRGDY
Publication Date
20000801
Document Type
Journal Article
Funding Amount
7404259
Funding Type
Grant
Fiscal Year
2000
NTIS Accession No.
NTIS Price
Identifying No.
Grant-Number-T15-OH-07104
Issue of Publication
8
ISSN
0105-4538
Priority Area
Control-technology
Source Name
Allergy
State
IL; ME; NC
Performing Organization
University of Illinois at Chicago, Chicago, Illinois
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