Indoor aeromycota in relation to residential characteristics and allergic symptoms

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Abstract
The indoor aeromycota in several rooms of each of 15 residences in Kitchener-Waterloo, Ontario, Canada was studied from December 1991 to September 1993. There were significant differences in airborne spore concentrations among the types of rooms investigated. Numbers of airborne propagules were highest in the living rooms, followed by family rooms, kitchens, bathrooms and bedrooms. The highest fungal diversity was found in kitchens. Generally, presence of dampness and of carpets led to increased numbers of airborne spores. Forced air heating systems, humidifiers, air filters and air conditioners reduced concentrations of airborne fungi. Patients with respiratory allergies and known sensitivity to moulds reported allergic symptoms significantly less severe than average in residences with air conditioners, air filters, humidifiers and forced air heating systems. In damp residences, their symptoms were significantly more severe than the average.