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Air and Environmental Contamination Caused by COVID-19 Patients: a Multi-Center Study

Journal of Korean Medical Science 2020년 35권 37호 p.332 ~ 332
김어진, 이성엽, 이지연, 이아랑, 김승은, 최옥자, 이지숙, 기승정, 장희창,
소속 상세정보
김어진 ( Kim Uh-Jin ) - Chonnam National University Medical School Department of Infectious Diseases
이성엽 ( Lee Seung-Yeob ) - Chonnam National University Medical School Department of Laboratory Medicine
이지연 ( Lee Ji-Yeon ) - Keimyung University Dongsan Hospital Department of Internal Medicine
이아랑 ( Lee Ah-Rang ) - Chonnam National University Medical School Department of Infectious Diseases
김승은 ( Kim Seung-Eun ) - Chonnam National University Medical School Department of Infectious Diseases
최옥자 ( Choi Ok-Ja ) - Chonnam National University Hwasun Hospital Office for Infection Control
이지숙 ( Lee Ji-Suk ) - Chonnam National University Medical School Department of Infectious Diseases
기승정 ( Kee Seung-Jung ) - Chonnam National University Medical School Department of Laboratory Medicine
장희창 ( Jang Hee-Chang ) - Chonnam National University Medical School Department of Infectious Diseases

Abstract


Background: The purpose of this study was to determine the extent of air and surface contamination of severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) in four health care facilities with hospitalized coronavirus disease 2019 (COVID-19) patients.

Methods: We investigated air and environmental contamination in the rooms of eight COVID-19 patients in four hospitals. Some patients were in negative-pressure rooms, and others were not. None had undergone aerosol-generating procedures. On days 0, 3, 5, and 7 of hospitalization, the surfaces in the rooms and anterooms were swabbed, and air samples were collected 2 m from the patient and from the anterooms.

Results: All 52 air samples were negative for SARS-CoV-2 RNA. Widespread surface contamination of SARS-CoV-2 RNA was observed. In total, 89 of 320 (27%) environmental surface samples were positive for SARS-CoV-2 RNA. Surface contamination of SARS-CoV-2 RNA was common in rooms without surface disinfection and in rooms sprayed with disinfectant twice a day. However, SARS-CoV-2 RNA was not detected in a room cleaned with disinfectant wipes on a regular basis.

Conclusion: Our data suggest that remote (> 2 m) airborne transmission of SARS-CoV-2 from hospitalized COVID-19 patients is uncommon when aerosol-generating procedures have not been performed. Surface contamination was widespread, except in a room routinely cleaned with disinfectant wipes.

키워드

SARS-CoV-2; Transmission; Environmental Sampling; Droplet

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