Healthcare Provider N95 Respirator Contamination Worn Behind Face Shields With SARS-CoV-2 During Routine Clinical Care of Patients With COVID-19

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  • Graves A.M
    • Other Affiliation: Division of Infectious Diseases, Duke Center for Antimicrobial Stewardship and Infection Prevention, Durham, NC, United States
  • Warren B.G
    • Other Affiliation: Division of Infectious Diseases, Duke Center for Antimicrobial Stewardship and Infection Prevention, Durham, NC, United States
  • Barrett A
    • Other Affiliation: Division of Infectious Diseases, Duke Center for Antimicrobial Stewardship and Infection Prevention, Durham, NC, United States
  • Lewis S.S
    • Other Affiliation: Division of Infectious Diseases, Duke Center for Antimicrobial Stewardship and Infection Prevention, Durham, NC, United States
  • Smith B
    • Other Affiliation: Division of Infectious Diseases, Duke Center for Antimicrobial Stewardship and Infection Prevention, Durham, NC, United States
  • Weber D.J
    • Affiliation: School of Medicine, Division of Infectious Diseases
  • Sickbert-Bennett E.E
    • Affiliation: School of Medicine, Division of Infectious Diseases
  • Anderson D.J
    • Other Affiliation: Division of Infectious Diseases, Duke Center for Antimicrobial Stewardship and Infection Prevention, Durham, NC, United States
Abstract
  • N95 respirator contamination with severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) during clinical care of patients with coronavirus disease 2019 is poorly understood. We performed a prospective observational study on healthcare provider's (HCP's) N95 respirators' and face shields' SARS-CoV-2 contamination during aerosol-generating procedures on SARS-CoV-2- positive patients housed in a COVID-19-specific unit. Medical masks worn on top of HCP's N95 respirators, and under face shields, during study aerosol-generating procedures were used as surrogates to detect contamination to avoid waste. Thirtythree HCPs were studied, and a total of 33 mask and 27 face shields were sampled. Masks were cut into 9 pieces and face shields were sampled twice, front and back, to determine locality of contamination; however, no positive samples were identified using standard polymerase chain reaction techniques with a CT value up to 40. All 9 mask piece samples were then pooled, as were face shield samples, using centrifugal concentration with polyethersulfone membranes. Once pooled and concentrated, overall, 9 (15%) samples were positive via real-time polymerase chain reaction: 5 from masks (15.2%) and 4 from face shields (14.8%).
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  • Article
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  • In Copyright
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  • Attribution 4.0 International
Journal title
  • Open Forum Infectious Diseases
Journal volume
  • 11
Journal issue
  • 3
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  • English
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  • Publisher
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  • 2328-8957
Publisher
  • Oxford University Press

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