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Reduced mite allergen levels in dwellings with mechanical exhaust and supply ventilation.
Department of Environmental Health and infectious Diseases Control, Karolinska Hospital, Stockholm.
Department of Environmental Health and infectious Diseases Control, Karolinska Hospital, Stockholm.
Department of Environmental Health and infectious Diseases Control, Karolinska Hospital, Stockholm.ORCID iD: 0000-0003-2504-343X
Department of Environmental Health and infectious Diseases Control, Karolinska Hospital, Stockholm.
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1994 (English)In: Clinical and Experimental Allergy, ISSN 0954-7894, E-ISSN 1365-2222, Vol. 24, no 2, 109-114 p.Article in journal (Refereed) Published
Abstract [en]

Seventy similar bungalows constructed between 1968 and 1970 in the same suburban area of Stockholm were investigated regarding the content of house dust mite allergen, absolute indoor humidity, type of ventilation and basement construction. Houses with mechanical exhaust and supply ventilation had an indoor humidity above 7 g/kg less often than houses without this type of ventilation (Odds ratio 0.1, 95% confidence interval 0.0-0.2). Furthermore, only five of the 24 houses with exhaust and supply ventilation contained mattress dust mite allergen concentrations exceeding the median value (98.5 ng/g) compared with 30 of 46 hours which did not have such ventilation (odds ratio = 0.1, C.I. 0.0-0.5). Houses with both natural ventilation and crawl space basement harboured significantly less mattress mite allergen than houses having the same type of ventilation, but with a concrete slab basement. In a cold temperature climate, type of building construction and ventilation seem to be important for the occurrence of house dust mite allergens in dwellings. Our results indicate that modern energy-efficient houses should be equipped with mechanical exhaust and supply ventilation to reduce indoor air humidity during the dry winter months and the risk of mite infestation.

Place, publisher, year, edition, pages
Blackwell Publishing, 1994. Vol. 24, no 2, 109-114 p.
Keyword [en]
allergen, ventilation
National Category
Medical and Health Sciences
Identifiers
URN: urn:nbn:se:rkh:diva-607DOI: 10.1111/j.1365-2222.1994.tb00205.xPubMedID: 8187025OAI: oai:DiVA.org:rkh-607DiVA: diva2:610346
Available from: 2013-03-11 Created: 2013-03-11 Last updated: 2014-10-21Bibliographically approved

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