Aspergillus
TG 26 Mould in Buildings, A BSRIA topic guide, written by Spyros Efthymiopoulos & Yasemin D. Aktas, and published by BSRIA in 2024, states:
‘Visible mould is a problem and should not be tolerated, regardless of what species it is. However, some species have heightened associations with excess moisture or water damage, and health problems: Aspergillus: Species of the Aspergillus genera are often treated as indicators of moisture damage and excess water. Especially, A. versicolor is listed in the international standard BS ISO 16000-17[3] as being indicative of the lack of moisture balance in a property. It is expected to be among the first moulds to thrive when the moisture content in a space is elevated for a prolonged time. High exposure to this mould leads to Aspergilloma or Aspergillosis, which particularly affect people with low immune support or pre-existing respiratory health problems.’
--BSRIA
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