Abstract
RESULTS: Recorded light levels ranged from 5e2610 lux (mean 1⁄4 188; n1⁄475). Significantly fewer bacteria were recovered from coated keyboards than from control keyboards (p < 0.001). Multiple regression analysis confirmed that the light activated antimicrobial coating had a reductive effect upon ACC (t 1⁄4 -5.44; p < 0.0001). Bed occupation and the status of the visual prompt at the time of sampling were also important factors. Fewer bacteria were recovered from unoccupied bed spaces (t 1⁄4 -3.99; p < 0.0001). More bacteria were recovered from keyboards with a flashing cleaning reminder than from thosewithout (t1⁄4 2.81; p1⁄4 0.005). Lux reading had no effect upon ACC (p 1⁄4 0.97). CONCLUSIONS: Computer keyboards can act as a source from which healthcare workers can contaminate their hands. A lightactivated antimicrobial coating could help reduce the associated bioburden and thus, the risk of onward transmission. However, the use of any antimicrobial surface does not negate the need for frequent and proper cleaning.
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