Asymptomatic COVID-19 Patients Can Contaminate Their Surroundings: an Environment Sampling Study.,mSphere

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Asymptomatic COVID-19 Patients Can Contaminate Their Surroundings: an Environment Sampling Study.
mSphere ( IF 3.7 ) Pub Date : 2020-06-24 , DOI: 10.1128/msphere.00442-20
Li Wei ₁ , Ji Lin ₁ , Xiaofei Duan ₂ , Wenzhi Huang ₁ , Xiaojun Lu ₃ , Juan Zhou ₃ , Zhiyong Zong _{4,

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Affiliation

The contamination of patients’ surroundings by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) remains understudied. We sampled the surroundings and the air of six negative-pressure non-intensive care unit (non-ICU) rooms in a designated isolation ward in Chengdu, China, that were occupied by 13 laboratory-confirmed coronavirus disease 2019 (COVID-19) patients who had returned from overseas travel, including 2 asymptomatic patients. A total of 44 of 112 (39.3%) surface samples were positive for SARS-CoV-2 as detected by real-time PCR, suggesting extensive contamination, although all of the air samples were negative. In particular, in a single room occupied by an asymptomatic patient, four sites were SARS-CoV-2 positive, highlighting that asymptomatic COVID-19 patients do contaminate their surroundings and impose risks for others with close contact. Placement of COVID-19 patients in rooms with negative pressure may bring a false feeling of safety, and the importance of rigorous environment cleaning should be emphasized.

更新日期：2020-06-24

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