Evaluation of zone-disinfection effect of air-passable plasma filter in a novel chamber model

Source avec lien : Journal of Hospital Infection, (Prépublication). 10.1016/j.jhin.2022.06.013

La désinfection des espaces partagés est devenue essentielle pour minimiser la propagation de diverses maladies. Un dispositif de désinfection efficace, capable d’inactiver simultanément les bactéries aéroportées et les bactéries adhérant aux surfaces dans un espace clos, est nécessaire.

Background Disinfection of shared spaces has become essential to minimize the spread of various diseases. An efficient disinfection device that can simultaneously inactivate airborne bacteria and surface adhered bacteria in an enclosed space is required. Aim An air-passable plasma filter (APF) was developed and applied to a chamber model to evaluate the zone-disinfection effect. Methods The 60 litre chamber consisted of a nebulizer, circulation fans, temperature and humidity monitors, an air sampling port with a sealed gate, airborne bacteria trapping media, and a built-in fan for evaluation. After spraying each bacterial strain (Escherichia coli, Staphylococcus epidermidis, and Mycobacterium smegmatis) as a bioaerosol, airborne and surface-attached bacteria were quantified simultaneously to evaluate the zone-disinfection effect of APF. Findings The operation of APF in the 60 litre chamber showed a complete zone-disinfection effect for E. coli (10 min), S. epidermidis (10 min), and M. smegmatis (60 min) present in the air and on the walls at various locations. The time required to completely disinfect each of the airborne bacteria and surface-attached bacteria within the same space was different. Conclusion APF has the potential to exhibit significant germicidal effects on various microorganisms and can be an effective alternative for disinfection of enclosed spaces.

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