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. 2016 Jan 7;82(2):450–458. doi: 10.1128/AEM.02660-15

TABLE 1.

Surviving cell numbers of E. coli NCTC 12900 with respect to treatment and posttreatment storage times

Posttreatment storage time (h) Plasma treatment time (min) Density by mode of plasma exposurea
Direct
Indirect
Cell density (log10 CFU/ml) SD Cell density (log10 CFU/ml) SD
0 0b 8.0 A 0.0 8.0 A 0.0
1 7.6 A 0.1 7.3 B 0.1
3 4.3 B 0.1 5.7 C 0.1
5 2.1 C 0.7 ND D 0.0
1 0b 8.0 A 0.0 8.0 A 0.0
1 7.2 D 0.1 7.1 B 0.2
3 ND E 0.0 ND D 0.0
5 ND E 0.0 ND D 0.0
24 0b 8.0 A 0.0 8.0 A 0.0
1 5.9 DF 0.1 6.1 BE 0.8
3 ND E 0.0 ND D 0.0
5 ND E 0.0 ND D 0.0
a

Different letters indicate a significant difference at the P ≤ 0.05 level between different treatment times and posttreatment storage times. ND, under detection limit.

b

Critical controls were provided as untreated samples with 0-, 1-, and 24-h posttreatment storage.