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. 2020 Jan 14;82(3):320–324. doi: 10.1292/jvms.19-0562

Table 1. Log10 colony-forming units (CFU)/ml (mean ± SE) of rifampicin-resistant Salmonella Infantis (rif-SI), Escherichia coli (E. coli) and Salmonella Infantis (SI) subsequent to treated by potassium peroxymonosulfate at manufacturing-recommended concentration (1X), 0.5X, 0.25X or 0.125X even in the absence or presence of organic materials.

1X
0.5X
0.25X
0.125
Absencea) Presenceb) Absence Presence Absence Presence Absence Presence
rif-SI tpcc) 8.84 ± 0.06 8.84 ± 0.06 8.84 ± 0.06 8.84 ± 0.06 8.77 ± 0.29 8.93 ± 0.25 8.77 ± 0.29 8.82 ± 0.34
0 secd) 8.81 ± 0.04 8.81 ± 0.15 8.69 ± 0.07 8.84 ± 0.09 8.91 ± 0.20 9.05 ± 0.23 8.95 ± 0.13 8.57 ± 0.86
5 sece) 4.25 ± 1.85* 4.96 ± 2.09* 6.31 ± 0.72 6.72 ± 1.46 6.80 ± 0.36 7.72 ± 0.21 7.78 ± 0.31 NT
30 sec <2.60 ± 0.00** <2.60 ± 0.00** 2.70 ± 0.17* 2.80 ± 0.35* <2.6 ± 0.00** 5.88 ± 1.28* 2.92 ± 0.55* NT
1 min NT NT NT NT NT 3.88 ± 2.21* <2.6 ± 0.00** 7.60 ± 0.00
5 min NT NT NT NT NT NT NT 6.72 ± 1.07
10 min NT NT NT NT NT NT NT 4.48 ± 1.11*
15 min NT NT NT NT NT NT NT 3.04 ± 0.75*

E. coli tpc 8.04 ± 0.19 8.04 ± 0.19 8.15 ± 0.12 8.15 ± 0.12 7.89 ± 0.21 7.89 ± 0.21 7.89 ± 0.21 7.89 ± 0.21
0 sec 7.81 ± 0.18 7.50 ± 0.39 7.89 ± 0.22 7.87 ± 0.06 7.94 ± 0.04 7.99 ± 0.10 8.25 ± 0.56 7.59 ± 0.60
5 sec <2.60 ± 0.00** <2.60 ± 0.00** 4.06 ± 0.24* 5.57 ± 1.39 5.33 ± 0.51 6.13 ± 0.32 5.50 ± 1.18 NT
30 sec <2.60 ± 0.00** <2.60 ± 0.00** <2.06 ± 0.00** <2.60 ± 0.00** <2.60 ± 0.00** <2.60 ± 0.00** <2.60 ± 0.00** 6.01 ± 0.22
1 min NT NT NT NT NT NT NT 4.80 ± 0.66*
5 min NT NT NT NT NT NT NT <2.60 ± 0.00**

SI tpc 8.43 ± 0.07 8.43 ± 0.07 8.43 ± 0.07 8.43 ± 0.07 8.21 ± 0.06 8.10 ± 0.22 8.09 ± 0.23 8.04 ± 0.32
0 sec 7.76 ± 0.05 8.32 ± 0.29 8.56 ± 0.13 8.47 ± 0.04 8.25 ± 0.10 8.10 ± 0.25 8.13 ± 0.26 7.94 ± 0.28
5 sec 3.31 ± 1.22* 3.62 ± 0.92* 6.79 ± 0.33 3.62 ± 0.92* 6.75 ± 1.20 6.97 ± 0.89 7.37 ± 0.33 7.68 ± 0.11
30 sec <2.60 ± 0.00** <2.60 ± 0.00** <2.60 ± 0.00** <2.60 ± 0.00** 3.40 ± 1.38* 4.46 ± 1.61* 3.78 ± 2.05* 6.90 ± 0.61
1 min NT NT NT NT NT NT NT 6.05 ± 0.15
5 min NT NT NT NT NT NT NT <2.60 ± 0.00**

a) Absence of organic material. b) Presence of organic materials. c) The titer converted into an index in log10 of bacteria control. d) Blocking solution added before bacteria. e) The titer converted into an index in log10 of the recovered bacteria after indicated duration of treatment such as 5 sec, 30 sec, 1 min, 5 min 10 min and 15 min. NT: Not tested. *Inactivation regarded as effective when RF was greater than or equal to 3 and indicated to be statistical significant (P<0.05). **Bacterial titer <2.60 log10 CFU/ml indicates bacterial reduction to the undetectable level and significantly inactivating effective.