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Deprecated: Implicit conversion from float 265.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 J+Microbiol 2020 ; 58 (10): 886-891 Nephropedia Template TP
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Development of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) thermal inactivation method with preservation of diagnostic sensitivity #MMPMID32989642
Kim YI; Casel MAB; Kim SM; Kim SG; Park SJ; Kim EH; Jeong HW; Poo H; Choi YK
J Microbiol 2020[Oct]; 58 (10): 886-891 PMID32989642show ga
Various treatments and agents had been reported to inactivate RNA viruses. Of these, thermal inactivation is generally considered an effective and cheap method of sample preparation for downstream assays. The purpose of this study is to establish a safe inactivation method for SARS-CoV-2 without compromising the amount of amplifiable viral genome necessary for clinical diagnoses. In this study, we demonstrate the infectivity and genomic stability of SARSCoV- 2 by thermal inactivation at both 56 degrees C and 65 degrees C. The results substantiate that viable SARS-CoV-2 is readily inactivated when incubated at 56 degrees C for 30 min or at 65 degrees C for 10 min. qRT-PCR of specimens heat-inactivated at 56 degrees C for 30 min or 65 degrees C for 15 min revealed similar genomic RNA stability compared with non-heat inactivated specimens. Further, we demonstrate that 30 min of thermal inactivation at 56 degrees C could inactivate viable viruses from clinical COVID-19 specimens without attenuating the qRT-PCR diagnostic sensitivity. Heat treatment of clinical specimens from COVID-19 patients at 56 degrees C for 30 min or 65 degrees C for 15 min could be a useful method for the inactivation of a highly contagious agent, SARS-CoV-2. Use of this method would reduce the potential for secondary infections in BSL2 conditions during diagnostic procedures. Importantly, infectious virus can be inactivated in clinical specimens without compromising the sensitivity of the diagnostic RT-PCR assay.