Table 3.

Dustiness of grass seeds (n = 3) in terms of numbers of microorganisms and amount of endotoxin and dust aerosolised during 1 min of rotation in a rotating drum (amount aerosolised kg^{− 1} grass seed) (Step 2).

Source	Dust (mg)	Endotoxin (EU)	Mesophilic fungi (cfu)	Aspergillus fumigates(cfu)	Thermophilic actinomycetes (cfu)	Mesophilic actinomycetes (cfu)
Problematic seeds, uncleaned	362a	3.79 × 106a	4.77 × 108a	1.50 × 108a	2.25 × 109a	5.25 × 109a
Problematic seeds, cleaned	49.5c	6.41 × 105b	1.50 × 107b	6.82 × 106b	3.75 × 107b	1.88 × 108b
Reference seeds, uncleaned	72.5b	1.62 × 105c	6.36 × 105c	2.03 × 103c	1.57 × 102d	2.77 × 106c
Reference seeds, cleaned	14.5d	7.78 × 103d	1.62 × 105d	1.35 × 103c	2.10 × 104c	4.36 × 105d

Numbers in the same column followed by the same letter are not significantly different (P > 0.05).