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Caring for indoor air quality (IAQ) in so-called non-industrial areas has become increasingly common. Because of people's awareness of hazards related to the presence of different substances in indoor air. A review with 103 references concerning the presence of organic compounds in non-industrial indoor environments is discussed. The main sources of indoor air pollutants are presented. Topics discussed also include: total volatile organic compounds (TVOC) concepts in IAQ evaluation, concentrations of organic compounds in indoor and outdoor air, and the influence of outdoor air on indoor air quality expressed as ratios of indoor (I) to outdoor (O) concentrations (I/O).
A total of 111 isolates of yeast-like fungi and yeasts belonging to 40 species of 19 genera were identified in indoor air and outdoor air. Only one species, Kluyveromyces marxianus, was recorded in both types of air and seasons (spring and autumn). Kluyveromyces lactis and Yarrowia lipolytica, a species having the greatest symbiotic abilities, dominated in indoor air and outdoor air, respectively. Intensely used rooms, especially those with limited access of air, have the broadest range of species of yeast-like fungi. A comparison of both habitats shows that school rooms pose a greater epidemiological risk of yeast-like infections than outdoor air. The indoor as well as outdoor mycobiota undergoes phenological changes although it is determined by other biotic and abiotic factors.
The microbial quality of the outdoor air in Poznań (Poland) was estimated by sedimentation method in the years 2002 and 2003. Microorganism concentration was high, the average monthly number of bacteria in 2002 often exceeded 3,000 cfu/m3 and reached in the summer 13,000 cfu/m3 . At least 50% of airborne microorganisms were filamentous fungi. The concentration of two allergenic fungus genera Cladosporium and Alternaria estimated by Burkard trap reached in summer months 11,000 spores/m3 in 2002 and 16,000 spores/m3 in 2003. Airborne microorganism concentrations varied and changed with seasons and years, depending on sampling site and method of determination.
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