1. Investigating Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) Surface and Air Contamination in an Acute Healthcare Setting During the Peak of the Coronavirus Disease 2019 (COVID-19) Pandemic in London.
- Author
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Zhou, Jie, Otter, Jonathan A, Price, James R, Cimpeanu, Cristina, Garcia, Danel Meno, Kinross, James, Boshier, Piers R, Mason, Sam, Bolt, Frances, Holmes, Alison H, and Barclay, Wendy S
- Subjects
RNA analysis ,HOSPITALS ,AIR microbiology ,RESEARCH ,REVERSE transcriptase polymerase chain reaction ,SARS-CoV-2 ,MICROBIAL ecology ,SCIENTIFIC observation ,CONFIDENCE intervals ,COVID-19 ,CROSS-sectional method ,MEDICAL cooperation ,CRITICAL care medicine ,DESCRIPTIVE statistics ,CHI-squared test ,POLYMERASE chain reaction ,ODDS ratio ,MICROBIAL contamination ,COVID-19 pandemic ,LONGITUDINAL method ,MICROBIAL sensitivity tests - Abstract
Background We evaluated severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) surface and air contamination during the coronavirus disease 2019 (COVID-19) pandemic in London. Methods Prospective, cross-sectional, observational study in a multisite London hospital. Air and surface samples were collected from 7 clinical areas occupied by patients with COVID-19 and a public area of the hospital. Three or four 1.0-m3 air samples were collected in each area using an active air sampler. Surface samples were collected by swabbing items in the immediate vicinity of each air sample. SARS-CoV-2 was detected using reverse-transcription quantitative polymerase chain reaction (PCR) and viral culture; the limit of detection for culturing SARS-CoV-2 from surfaces was determined. Results Viral RNA was detected on 114 of 218 (52.3%) surfaces and in 14 of 31 (38.7%) air samples, but no virus was cultured. Viral RNA was more likely to be found in areas immediately occupied by COVID-19 patients than in other areas (67 of 105 [63.8%] vs 29 of 64 [45.3%]; odds ratio, 0.5; 95% confidence interval, 0.2–0.9; P =.025, χ 2 test). The high PCR cycle threshold value for all samples (>30) indicated that the virus would not be culturable. Conclusions Our findings of extensive viral RNA contamination of surfaces and air across a range of acute healthcare settings in the absence of cultured virus underlines the potential risk from environmental contamination in managing COVID-19 and the need for effective use of personal protective equipment, physical distancing, and hand/surface hygiene. [ABSTRACT FROM AUTHOR]
- Published
- 2021
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