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Cleaning of filtering facepiece respirators contaminated with mucin and Staphylococcus aureus.

Authors
Heimbuch-BK; Kinney-K; Lumley-AE; Harnish-DA; Bergman-M; Wander-JD
Source
Am J Infect Control 2014 Mar; 42(3):265-270
NIOSHTIC No.
20043734
Abstract
BACKGROUND: Decontamination, cleaning, and reuse of filtering facepiece respirators (FFRs) has been proposed to mitigate an acute FFR shortage during a public health emergency. Our study evaluates the ability of commercially available wipe products to clean FFRs contaminated with either infectious or noninfectious aerosols. METHODS: Three models of surgical N95 FFRs were contaminated with aerosols of mucin or viable Staphylococcus aureus then cleaned with hypochlorite, benzalkonium chloride, or nonantimicrobial wipes. After cleaning, FFRs were separated into components (nose pad, fabrics, and perforated strip), and contaminants were extracted and quantified. Filtration performance was assessed for cleaned FFRs. RESULTS: Mucin removal was <1 log for all wipe products on all components. Inert wipes achieved approximately 1-log attenuation in viable S aureus on fabrics from all FFR models-removal was less effective from nose pads and perforated edges. Both antimicrobial wipes achieved 3-5-log attenuation on most components, with smaller reductions on nose pads and greater reductions on perforated strips. Particle penetration following cleaning yielded mean values <5%. The highest penetrations were observed in FFRs cleaned with benzalkonium chloride wipes. CONCLUSIONS: FFRs can be disinfected using antimicrobial wipe products, but not effectively cleaned with the wipes evaluated in this study. This study provides informative data for the development of better FFRs and applicable cleaning products.
Keywords
Face-masks; Respirators; Respiratory-equipment; Respiratory-protective-equipment; Air-purifying-respirators; Cleaning-compounds; Decontamination; Aerosols; Infection-control; Infectious-diseases; Disease-control; Microorganisms; Filtration; Filter-fabrics; Aerosol-particles; Author Keywords: Aerosol; Bioaerosol; Decontamination; Influenza; Pandemic; Saliva
Contact
Brian K. Heimbuch, MS, Applied Research Associates, 430 W 5th St, Ste 700, Panama City, FL 32401
CODEN
AJICDC
CAS No.
8001-54-5
Publication Date
20140301
Document Type
Journal Article
Email Address
bheimb44@gmail.com
Fiscal Year
2014
NTIS Accession No.
NTIS Price
Identifying No.
M022014
Issue of Publication
3
ISSN
0196-6553
NIOSH Division
NPPTL
Source Name
American Journal of Infection Control
State
FL; PA
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