Effectiveness of Disinfectants Suitable for Inactivating SARS-CoV-2 at Cold-Chain Temperature.

Xiaosong Wu, Yin Chen, Ling Wang, Xiling Guo, Lunbiao Cui, Yiming Shen, Fang Li, Hong Sun, Liubo Zhang, Jin Shen, Yan Xu

Food and environmental virology 2022 Mar

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To prevent the spread of SARS-CoV-2 in cold-chain transportation in China, we developed specific cryogenic disinfectants. Carrier tests were performed against SARS-CoV-2 at - 20 °C for the four cryogenic disinfectants developed and qRT-PCR was used to test the virus RNA. Peracetic acid, chlorine disinfectants (two different concentrations), and quaternary ammonium disinfectant with their antifreeze can all inactivate SARS-CoV-2 in 5 min at - 20 °C. However, after 2-3 h of exposure, only chlorine disinfectant could destroy SARS-CoV-2 RNA. The viruses treated with peracetic acid and quaternary disinfectants showed positive Ct values even after 3 h detected with qRT-PCR. The conclusion was that the cold-chain disinfectants we tested could inactivate SARS-CoV-2 quickly and effectively, but only chlorine disinfectants could destroy nucleic acids in 3 h. Our study also illustrated that using qRT-PCR detection of viral nucleic acids to assess disinfection was inappropriate. © 2022. The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.

Citation

Xiaosong Wu, Yin Chen, Ling Wang, Xiling Guo, Lunbiao Cui, Yiming Shen, Fang Li, Hong Sun, Liubo Zhang, Jin Shen, Yan Xu. Effectiveness of Disinfectants Suitable for Inactivating SARS-CoV-2 at Cold-Chain Temperature. Food and environmental virology. 2022 Mar;14(1):101-104