The effect of temperature on persistence of SARS-CoV-2 on common surfaces

Virology Journal

Debbie Eagles¹  Sarah Goldie¹  Trevor W. Drew¹  Shane Riddell¹  Andrew Hill¹ 

[1] Commonwealth Scientific and Industrial Research Organisation (CSIRO), Australian Centre for Disease Preparedness;

关键词: Environmental stability;    SARS-CoV-2;    COVID-19;    Survivability;   

DOI  :  10.1186/s12985-020-01418-7

来源: DOAJ

【 摘 要 】

Abstract Background The rate at which COVID-19 has spread throughout the globe has been alarming. While the role of fomite transmission is not yet fully understood, precise data on the environmental stability of SARS-CoV-2 is required to determine the risks of fomite transmission from contaminated surfaces. Methods This study measured the survival rates of infectious SARS-CoV-2, suspended in a standard ASTM E2197 matrix, on several common surface types. All experiments were carried out in the dark, to negate any effects of UV light. Inoculated surfaces were incubated at 20 °C, 30 °C and 40 °C and sampled at various time points. Results Survival rates of SARS-CoV-2 were determined at different temperatures and D-values, Z-values and half-life were calculated. We obtained half lives of between 1.7 and 2.7 days at 20 °C, reducing to a few hours when temperature was elevated to 40 °C. With initial viral loads broadly equivalent to the highest titres excreted by infectious patients, viable virus was isolated for up to 28 days at 20 °C from common surfaces such as glass, stainless steel and both paper and polymer banknotes. Conversely, infectious virus survived less than 24 h at 40 °C on some surfaces. Conclusion These findings demonstrate SARS-CoV-2 can remain infectious for significantly longer time periods than generally considered possible. These results could be used to inform improved risk mitigation procedures to prevent the fomite spread of COVID-19.

【 授权许可】

Unknown