Bactericidal and Fungicidal Efficacy of Chlorine Dioxide in Various Workspaces

Previously, we demonstrated the virucidal efficacy of low concentration chlorine dioxide (ClO2) gas in room settings. The purpose these studies was to evaluate novel ClO2 formats as potential biocidal interventions for real world congregate settings and air systems. Three types were conducted determine reducing bacteria mold various workspaces: hard soft surfaces (gymnasium & equipment), aerosol (in-room), within a laboratory environment. study that highly effective against both with reduction ranging from 85.0% - > 99.4% >99.4% yeast mold. Treatments on (gymnasiums sports reduced by an average 90% 95%. following treatments applied overnight: 1) surface spraying dilute solutions, 2) carpet tumbling powdered releasing impregnates, 3) HVAC treatment overall deodorization dose controlled sachets. in-room treating filtration media also indicated significant efficacy, 94% after 24-hour, 24-hours. In related study, biological combination Raoultella terrigena Staphylococcus aureus injected bio-aerosol into 4-inch diameter pipe flowing at approximately 1200 ft/min. Dry introduced flow achieve 5 or 10 ppmv. Air samples collected sampling ports downstream fan 10, 22, 55 100 ft along used changes airborne Testing setting ambient conditions. data showed viable organisms concentrations, reductions higher ppmv concentration, longer runs. final application gaseous tested. Low release filter testing 24-hour period. Higher class II cabinet bacillus spores steel coupons throughout 6 log. bactericidal fungicidal providing air. Novel product delivery forms may be useful rapidly disinfecting solid complex