Abstract
Basidiomycetes, including Schizophyllum commune, cause mycosis as well as pulmonary aspergillosis. Many basidiomycetes are termed filamentous basidiomycetes because they form white mycelia colonies on the medium. There are many unclear points on the situation of airborne filamentous basidiomycetes in general houses. In order to clarify the exposure situation of basidiomycetes, the airborne white filamentous basidiomycetes in 20 general houses was investigated. We sampled airborne fungi from the bedrooms and adjacent balconies throughout 4 seasons from autumn 2016 to summer 2017. Identification of isolated filamentous basidiomycetes was performed by DNA sequence analysis of the ITS region. As a result of this study, 29 strains of filamentous basidiomycetes in autumn, 7 strains in winter, 23 strains in spring and 49 strains in summer were isolated from bedrooms. The highest isolates were 38 strains of Trametes hirsuta followed by 12 strains of Trametes lactinea. The number of isolated S. commune was 10 strains. It was indicated that basidiomycete had the seasonality in the diffusion time of spore depending on the species. This survey revealed one of the conditions of airborne white filamentous basidiomycetes in the indoor air of general houses.
