Abstract
Abstract Airborne yeasts were collected with 6‐stage Andersen samplers indoors and outdoors in rural and urban areas in southern Finland in 1982–1983, usually twice a month (but once a month only during the period of snow cover). The predominant yeast genus was Sporobolomyces followed by Rhodotorula and Cryptococcus. The most frequently isolated species were Sporobolomyces roseus, Sp. holsaticus, Rhodotorula minuta, Rh. glutinis, Rh. rubra, Cryptococcus albidus and Cr. laurentii. Ascomycetous yeasts were caught infrequently; for example Candidas occurred in samples only occasionally. Numbers of yeasts indoors were significantly correlated with those out of doors in the country but not in town although numbers outdoors in town and country were correlated. Species found indoors were similar to those found out of doors. Numbers of yeast cells in the air were always small, never exceeding 50 CFU m‐3 and clearly below estimated threshold values for airborne fungi causing allergic reactions.
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