Table 2 Average bacterial count in CFU (colony forming unit) of Klebsiella pneumoniae on several materials over time.
From: The survival of multi-drug resistant bacteria on raw Douglas fir material
Klebsiella pneumoniae, ATCC 700603 | Materials | Inoculum (CFU/20 µL) | CFU | ||||||
|---|---|---|---|---|---|---|---|---|---|
D0 | D1 | D2 | D3 | D6 | D7 | D15 | |||
Assay 1 | Stainless steel | 2.60E + 08 | 1.65E + 04 ± 3.06E + 03 | 8.00E + 02 ± 6.93E + 02 | 3.24E + 02 ± 2.30E + 02 | 1.11E + 02 ± 1.04E + 02 | 1.11E + 02 ± 3.00E + 01 | 2.93E + 01 ± 3.00E + 01 | 8.13E + 01 ± 4.09E + 01 |
Pumice stone | 2.40E + 03 ± 1.44E + 03 | 6.67E + 02 ± 4.62E + 02 | 3.35E + 02 ± 2.15E + 02 | 1.73E + 01 ± 1.01E + 01 | 5.33E + 00 ± 2.31E + 00 | 8.00E + 00 ± 4.00E + 00 | 6.67E + 00 ± 4.62E + 00 | ||
Douglas fir | 2.13E + 03 ± 3.00E + 03 | 2.67E + 00 ± 4.62E + 00 | Absence | Absence | Absence | Absence | Absence | ||
Varnished Douglas fir | 1.61E + 04 ± 8.32E + 03 | 3.20E + 02 ± 3.17E + 02 | 1.01E + 02 ± 1.19E + 02 | 4.00E + 00 ± 0 | 1.33E + 00 ± 2.31E + 00 | Absence | Absence | ||
Assay 2 | Stainless steel | 5.40E + 08 | 8.00E + 03 ± 6.11E + 03 | 8.00E + 02 ± 6.93E + 02 | 5.07E + 02 ± 5.03E + 02 | 5.20E + 02 ± 4.51E + 02 | 4.00E + 02 ± 4.00E + 02 | 5.07E + 02 ± 8.43E + 02 | 3.07E + 01 ± 4.01E + 01 |
Maritime pine | 1.75E + 04 ± 5.33E + 03 | 1.20E + 03 ± 4.00E + 02 | 1.37E + 02 ± 8.99E + 01 | 1.85E + 02 ± 1.83E + 02 | 8.13E + 01 ± 2.95E + 01 | 3.20E + 01 ± 3.67E + 01 | Absence | ||
Assay 3 | Douglas fir | 6.80E + 08 | 2.00E + 02 ± 2.12E + 02 | 1.33E + 01 ± 1.97E + 01 | 2.67E + 00 ± 2.31E + 00 | Absence | Absence | Absence | Absence |
Disinfected Douglas fir | Absence | Absence | Absence | Absence | Absence | Absence | Absence | ||
