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. 2009 Jul 17;9:247. doi: 10.1186/1471-2458-9-247

Table 1.

Evaluation of mould in 63-μm house dust fraction; modified one-step assessment model

Corresponding total count without yeast (cfu/g) Concentration limit, indicator genus

Aspergillus + Eurotium spp.
(cfu/g) or proportion (%)
Penicillium spp.
(cfu/g) or proportion (%)
0 – 500,000 ≥ 200,000 cfu/g ≥ 300,000 cfu/g
500,000 – 2,000,000 ≥ 20% ≥ 20%
> 2,000,000 ≥ 420,000 cfu/g ≥ 450,000 cfu/g