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Mouldy houses influence symptoms of asthma among atopic individuals


Dharmage, S and Bailey, M and Raven, J and Abeyawickrama, K and Cao, D and Guest, D and Rolland, J and Forbes, A and Thien, F and Abramson, M and Walters, EH, Mouldy houses influence symptoms of asthma among atopic individuals, Clinical and Experimental Allergy, 32 pp. 714-720. ISSN 0954-7894 (2002) [Refereed Article]

DOI: doi:10.1046/j.1365-2222.2002.01371.x


Background: The influence of current levels of indoor fungi on asthma is a controversial issue that needs to be resolved in order to advise patients appropriately. Objective: To assess the seasonal variation in indoor fungal levels and the impact of these levels on asthma among mould-sensitized individuals. Methods: Thirty-five young adults with current asthma and sensitization to fungi were visited four times over 1 year. At each home visit a questionnaire was administered and samples of dust and air were collected. Participants also recorded information on symptoms, peak expiratory flows (PEF) and medication use. Dust samples were analysed for house dust mite allergen (Der p 1) and total fungal biomass (ergosterol). Total and genus-specific fungal propagules were identified in air samples. Seasonal variation in allergen levels and significant independent effects of fungal levels on peak flow variability (PFV) were identified by repeated measures analysis of variance. Results: Significant seasonal variations were observed in viable airborne fungi, ergosterol levels in the floor dust and PFV. PFV correlated significantly with symptom scores and the dose of reliever medication. PFV was also significantly associated with smoking and visible mould. The association between visible mould and PFV was independent of season, smoking and the dose of reliever medication. However, there was no association between total fungi, specific fungi or ergosterol and PFV. Der p 1 levels had no significant influence on asthma, even in HDM-sensitized individuals. Conclusions: Mouldy homes adversely influence asthma in asthmatics sensitized to fungi.

Item Details

Item Type:Refereed Article
Research Division:Biomedical and Clinical Sciences
Research Group:Cardiovascular medicine and haematology
Research Field:Respiratory diseases
Objective Division:Health
Objective Group:Clinical health
Objective Field:Clinical health not elsewhere classified
UTAS Author:Walters, EH (Professor Haydn Walters)
ID Code:24374
Year Published:2002
Web of Science® Times Cited:60
Deposited By:Medicine
Deposited On:2002-08-01
Last Modified:2003-03-18

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