Fig 1.
Schema of research determining the disinfection efficiency using UV-C radiation, considering the distance from the radiation source, the power of UV-C lamps, and the duration of UV-C exposure.
Fig 2.
Schema of the representative patient’s room in (A) plan view, (B) 3D view, and (C) real view showed the positioning of the UV-C lamp and area of sampling. The UV-C device was placed under the entrance to the room at a height of 250 cm. The samples were placed on the floor at a distance of 100 cm (Fig 2A, points 1, 4, 8), 200 cm (Fig 2A, points 2, 5, 9), and 300 cm (Fig 2A, points 3, 10). Two samples, no. 6 and 7, were placed at the height of 100 cm at a distance of 100 cm and 200 cm from the UV-C lamp, respectively.
Fig 3.
The effectiveness of the UV-C device (72-watt) in reducing Escherichia coli and Staphylococcus epidermidis after treatment for 60 minutes at varying distances between the sample and the UV-C source (0–200 cm).
Fig 4.
UV-C disinfection efficiency measured against (A) Escherichia coli and (B) Staphylococcus epidermidis exposed to different nominal power of UV-C radiator (36–180 W) at 100 cm distance and different irradiation times (10–60 min).
Table 1.
UV-C disinfection efficiency measured in different places in the patient room (Fig 2) after 60 minutes of irradiation.
Fig 5.
The influence of furniture on the disinfection efficiency of a UV-C device against Escherichia coli and Staphylococcus epidermidis after 60 minutes of UV-C irradiation.