Condition

Time Intervals

Dilution 10−1

Dilution 10−2

Dilution 10−3

Dilution 10−4

Dilution 10−5

Without UV (Control)

Overnight

670 CFU

40 CFU

20 CFU

8 CFU

4 CFU

Exposure to UV

10 sec

211 CFU

20 CFU

12 CFU

6 CFU

<1 CFU

20 sec

193 CFU

14 CFU

4 CFU

2 CFU

<1 CFU

30 sec

100 CFU

1 CFU

2 CFU

1 CFU

<1 CFU

60 sec

18 CFU

<1 CFU

<1 CFU

<1 CFU

<1 CFU

40 minutes

<1 CFU

<1 CFU

<1 CFU

<1 CFU

<1