GTRI Study:
Objective: To determine the antimicrobial efficacy of LED-based UV light on various PPE materials including facemasks.
Test Factors:
- Material
- Challenge organism
- Treatment exposure
I. Facemask material
A. Certified N95 mask
B. Disposable surgical masks
II. Challenge organism (4 bacterial strains)
A. 2-gram positive bacterial species
i. SA: Staphylococcus aureus subsp. aureus
Rosenbach (ATCC® 6538™)
ii. BA: Bacillus atrophaeus (ATCC® 9372™))
B. 2-gram negative bacterial species
i. EC: Escherichia coli (ATCC 25922™)
ii. PA: Pseudomonas aeruginosa (ATCC®
15442™)
III. Treatment exposure
- 60 seconds = one cycle (actually 66 seconds exposure)
- 120 seconds = two cycles (actually 132 sec exposure)
- 180 seconds = three cycles (actually 198 sec exposure)
