TABLE 2.
Surviving populations of viruses, bacteria, and fungi subjected to nebulization and circulation without UVC LED irradiation
| Organism | Surviving population of microorganisms relative to nebulization time without UVC LED treatment (log PFU/vola)b | ||||
|---|---|---|---|---|---|
| Viruses | 0 min | 1 min | 3 min | 5 min | 10 min |
| MS2 | 8.23 ± 0.60 A | 8.00 ± 0.46 A | 7.97 ± 0.30 A | 8.06 ± 0.42 A | 7.93 ± 0.34 A |
| Qβ | 7.22 ± 0.03 A | 6.97 ± 0.38 A | 6.90 ± 0.42 A | 6.81 ± 0.57 A | 6.85 ± 0.64 A |
| ϕX174 | 5.22 ± 0.08 A | 5.16 ± 0.08 A | 5.20 ± 0.11 A | 5.19 ± 0.40 A | 5.27 ± 0.47 A |
| Bacteria | 0 s | 15 s | 30 s | 45 s | 60 s |
| E. coli O157:H7 | 4.20 ± 0.17 A | 4.26 ± 0.16 A | 4.25 ± 0.31 A | 4.21 ± 0.10 A | 4.17 ± 0.15 A |
| S. Typhimurium | 4.06 ± 0.10 A | 4.13 ± 0.16 A | 4.12 ± 0.11 A | 4.15 ± 0.09 A | 4.22 ± 0.11 A |
| L. monocytogenes | 5.54 ± 0.15 A | 5.39 ± 0.26 A | 5.44 ± 0.11 A | 5.45 ± 0.21 A | 5.53 ± 0.51 A |
| S. aureus | 6.03 ± 0.25 A | 6.15 ± 0.16 A | 6.02 ± 0.18 A | 6.01 ± 0.22 A | 5.95 ± 0.20 A |
| Fungi | 0 min | 1 min | 2 min | 3 min | 5 min |
| As. flavus | 4.87 ± 0.03 A | 4.78 ± 0.12 A | 4.63 ± 0.24 A | 4.77 ± 0.27 A | 4.51 ± 0.37 A |
| Al. japonica | 5.23 ± 0.24 A | 5.21 ± 0.49 A | 5.32 ± 0.60 A | 5.20 ± 0.45 A | 5.12 ± 0.14 A |
a
Log PFU per unit volume of the chamber (27 liters).
b
Data represent means ± standard deviations from three replications. Values followed by the same letters within rows are not significantly different (P > 0.05).