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. 2014 Oct 3;9(10):e109402. doi: 10.1371/journal.pone.0109402

Table 2. Microbial contamination of building surfaces [CFU 100 cm−2].

No. Mineral surfaces Organic surfaces
Spring Summer Autumn Winter Spring Summer Autumn Winter
B-66 R 8.0–2.4×102 5.8×101–2.4×102 1.7×102–5.4×103 4.9×102–4.6×103 3.7×102–1.2×103 2.4×102–3.5×102 1.6×101–2,2×102 9.6×101–1,7×102
M 1.4×102 1.7×102 2.8×103 2.8×103 8.9×102 3.0×102 1.3×102 1.2×102
SD 1.2×102 9.7×101 2.6×103 2.1×103 4.5×102 5.6×101 1.0×102 3.9×101
B-70 R 1.6×101–7.2×102 1.3×102–6,0×102 2.5×101–1.7×103 1.6×101–8.6×102 1.6×101–2.6×103 7.4×101–1.4×103 9.6×101–1,5×103 1.6×101–4,3×103
M 2.9×102 3.3×102 3.9×102 2.3×102 1.5×103 7.2×102 7.7×102 2.2×103
SD 2.7×102 1.7×102 6.6×102 3.5×102 1.4×103 9.1×102 9.6×102 3.0×103
B-113 R 1.6×101–2.4×102 2.2×101–1,1×103 1.6×101–1,0×103 1.6×101–7.0×101 1.6×101–2,8×103 1.9×102–1.9×103 2.5×101–4.2×103 1.6×101–6.6×102
M 6.1×101 2.6×102 2.6×102 3.4×101 9.8×102 7.8×102 1.5×103 2.42×102
SD 1.0×102 4.5×102 4.2×102 2.3×101 1.6×103 9.4×102 2.4×103 3.7×102
B-114 R nd 8.4×101-2.4×102 1.6×101–2.4×103 1.6×101–4,1×102 1.6×101–7.2×103 3.0×102–4.6×102 2.5×101–3.9×103 1.6×101–3,9×103
M nc 1.7×102 7.6×102 1.6×102 1.4×103 9.5×102 2.1×103 1.3×103
SD nc 6.8×101 1.1×103 1.8×102 1.8×103 9.9×102 2.0×103 2.2×103
B-124 R nd 2.0×101–1.2×103 2.6×101–8,1×102 1.6×101–1,1×103 8.0–1.2×102 2.1×101–8.0×102 5,9×102–2,6×103 3,5×102–9,2×102
M nc 3.9×102 2.7×102 2.4×102 6.4×101 3.0×102 1.8×103 6.6×102
SD nc 4.7×102 3.2×102 4.8×102 5.6×101 4.4×102 1.1×103 2.9×102
B-138 R 1.6×101–8,4×103 2.2×102–2.9×103 9.6×101–4.3×102 1,1×102–1,7×103 nd 3.1×102–4.4×102 nd 1.3×102–1.5×102
M 2.4×103 1.0×103 2.5×102 8.8×102 nc 3.7×102 nc 1.4×102
SD 4.0×103 1.2×103 1.4×102 8.5×102 nc 9.0×101 nc 9.3×101

R - range; M - mean; SD - standard deviation; nd - not detected; nc - not calculated.