Spreading a Durable Protective Layer of Quaternary Ammonium Agents on an N95 Respirator for Predecontamination of Airborne Mycobacterium tuberculosis and Viruses Using Mycobacterium smegmatis and Bacteriophage MS2 as Models

Figure 1

Schematic diagrams of the aerosol test system used in the phase one study for decontamination of settled microbial particles (a) and the phase two study for decontamination of bioaerosols remaining on the respirator surface, along with the filtration performance test (b). The distance from the surface of the test respirator layer to the airflow inlet of the chamber was 60 cm in the phase one study and 30 cm in the phase two study.