Old dry mold growth seems to emit less bioactive metabolites and surfactants than actively growing microbes

Maria A. Andersson, Tamás Marik, Laszlo Kredics, Heidi Salonen, Jarek Kurnitski

Research output: Chapter in Book/Report/Conference proceedingChapterScientific

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Abstract

We characterized the toxicity and surfactant properties of old and fresh biomasses of indoor isolates of Trichoderma atroviride,Aspergillus versicolor, Chaetomium sp., Stachybotrys sp. and Rhizopus sp. Toxicity of cell dispersals fromold dry biomasses (> 12 months old) and actively growing molds(< 3 weeks old) was tested as inhibition of proliferation with somatic mammalian cell lines(PK-15 and MNA).Fresh biomasses were up to 100 times more toxic than old dry biomasses. When calculated per conidial particle,100 times more toxicity was associated with the fresh conidia than the old ones.Surfactant activity was detected both in biomass dispersals and exudates. We hypotized that the metabolic state of the fungal growth may influence fungal metabolite emission into indoor air. This information may be important when mouldy buildings are renovated.
Original languageEnglish
Title of host publicationSisäilmastoseminaari 2019
Subtitle of host publicationSisäilmayhdistys raportti 37
EditorsMervi Ahola, Anna Merikari
PublisherSIY SISÄILMATIETO OY
Pages215-220
ISBN (Electronic)978-952-5236-49-1
Publication statusPublished - 2019
MoE publication typeB2 Part of a book or another research book
EventSisäilmastoseminaari - Helsinki, Finland
Duration: 14 Mar 201914 Mar 2019
Conference number: 34

Publication series

NameSIY raportti
PublisherSisäilmayhdistys
Number37
ISSN (Print)1237-1866

Seminar

SeminarSisäilmastoseminaari
CountryFinland
CityHelsinki
Period14/03/201914/03/2019

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