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Mallmann L, Hermann BS, Schallenberger K, Demoliner M, Eisen AKA, Heldt FH, Gularte JS, Hansen AW, de Almeida PR, Weber MN, Spilki FR, Fleck JD. Proteinase K treatment in absence of RNA isolation classical procedures is a quick and cheaper alternative for SARS-CoV-2 molecular detection. J Virol Methods 2021; 293:114131. [PMID: 33798606 PMCID: PMC8008826 DOI: 10.1016/j.jviromet.2021.114131] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2020] [Revised: 03/12/2021] [Accepted: 03/15/2021] [Indexed: 11/22/2022]
Abstract
The World Health Organization (WHO) has declared a pandemic of COVID-19, the disease caused by the recently described SARS-CoV-2. The relevance and importance of mass diagnosis in order to find the asymptomatic individuals is widely recognized as a mandatory tool to reinforce the control measures for monitoring virus circulation and reduce the spreading of SARS-CoV-2. Here, we described quickness and cheaper strategies of direct RT-qPCR (in the absence of RNA isolation) and compared the results to those obtained using standard RNA isolation procedure. The tests varied using pure, diluted samples, combined with Proteinase K (PK) or Lysis Buffer. Our findings showed consistently that PK pre-treated samples in the absence of RNA extraction procedures presents similar results to those obtained by standard RNA isolation procedures. On average, 16 samples extracted with the MagMAX™ CORE Kit, take around 2 h, costing an average of USD 5, the pre-treatment of samples using PK, on the other hand, would cut the value to less than USD 0.30 and reduce the time of procedure in more than 1 ½ hours. The present study suggests the use of PK treatment instead of RNA isolation in order to reduce costs and time in processing samples for molecular diagnosis of SARS-CoV-2.
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Affiliation(s)
- L Mallmann
- Laboratório De Microbiologia Molecular, Universidade Feevale, Novo Hamburgo, Brazil
| | - B S Hermann
- Laboratório De Microbiologia Molecular, Universidade Feevale, Novo Hamburgo, Brazil
| | - K Schallenberger
- Laboratório De Microbiologia Molecular, Universidade Feevale, Novo Hamburgo, Brazil
| | - M Demoliner
- Laboratório De Microbiologia Molecular, Universidade Feevale, Novo Hamburgo, Brazil
| | - A K A Eisen
- Laboratório De Microbiologia Molecular, Universidade Feevale, Novo Hamburgo, Brazil
| | - F H Heldt
- Laboratório De Microbiologia Molecular, Universidade Feevale, Novo Hamburgo, Brazil
| | - J S Gularte
- Laboratório De Microbiologia Molecular, Universidade Feevale, Novo Hamburgo, Brazil
| | - A W Hansen
- Laboratório De Microbiologia Molecular, Universidade Feevale, Novo Hamburgo, Brazil
| | - P R de Almeida
- Laboratório De Microbiologia Molecular, Universidade Feevale, Novo Hamburgo, Brazil
| | - M N Weber
- Laboratório De Microbiologia Molecular, Universidade Feevale, Novo Hamburgo, Brazil
| | - F R Spilki
- Laboratório De Microbiologia Molecular, Universidade Feevale, Novo Hamburgo, Brazil
| | - J D Fleck
- Laboratório De Microbiologia Molecular, Universidade Feevale, Novo Hamburgo, Brazil.
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Friedman G, Lisboa T, Moraes R, Parolo E, Mallmann L. Crit Care 2005; 9:P28. [DOI: 10.1186/cc3091] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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