Table 1.
Inactivation performance of an array (KL265-50V-SM-WD) emitting UVC radiation at 269 nm peak wavelength with intensity of 1.25 mW cm−2 revealed no inactivation differences at 18 and 22 s of irradiation. A dose of 22.5 mJ cm−2 was enough to obtain a >3 log reduction. All experiments were performed in duplicate (intra-experimental repeats) and means were used for inactivation efficacy determination
|
Exposure time (s) |
Dose (mJ cm−2) |
Average viral burden (p.f.u./disc) |
Average log viral burden (p.f.u./disc) |
Log reduction compared to control (0 s) |
Percentage reduction |
|---|---|---|---|---|---|
|
Zero (control) |
0.0 |
4.00+05 |
5.60 |
na |
na |
|
12 |
15.0 |
8.00+02 |
2.90 |
2.70 |
99.80 |
|
18 |
22.5 |
1.50+02 |
2.18 |
3.43 |
99.96 |
|
22 |
27.5 |
2.00+02 |
2.30 |
3.30 |
99.95 |
na, not applicable.