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10.1016/j.jviromet.2021.114199

http://scihub22266oqcxt.onion/10.1016/j.jviromet.2021.114199
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suck abstract from ncbi


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pmid34091213      J+Virol+Methods 2021 ; 295 (ä): 114199
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  • SARS-CoV-2 detection by extraction-free qRT-PCR for massive and rapid COVID-19 diagnosis during a pandemic in Armenia #MMPMID34091213
  • Avetyan D; Chavushyan A; Ghazaryan H; Melkonyan A; Stepanyan A; Zakharyan R; Hayrapetyan V; Atshemyan S; Khachatryan G; Sirunyan T; Davitavyan S; Martirosyan G; Melik-Andreasyan G; Sargsyan S; Ghazazyan A; Aleksanyan N; Yin X; Arakelyan A
  • J Virol Methods 2021[Sep]; 295 (ä): 114199 PMID34091213show ga
  • COVID-19 pandemic severely impacted the healthcare and economy on a global scale. It is widely recognized that mass testing is an efficient way to contain the spread of SARS-CoV-2 infection as well as aid in the development of informed policies for disease management. However, the current COVID-19 worldwide infection rates increased the demand for rapid and reliable screening of infection. We compared the performance of qRT-PCR in direct heat-inactivated (H), heat-inactivated and pelleted (HC) samples against RNA in a group of 74 subjects (44 positive and 30 negative). Then we compared the sensitivity of HC in a larger group of 196 COVID-19 positive samples. Our study suggests that HC samples show higher accuracy for SARS-CoV-2 detection PCR assay compared to direct H (89 % vs 83 % of the detection in RNA). The sensitivity of detection using direct samples varied depending on the sample transport and storage media as well as the viral loads (as measured by qRT-PCR Ct levels). Altogether, all the data suggest that purified RNA provides more accurate results, however, direct sample testing with qRT-PCR may help to significantly increase testing capacity. Switching to the direct sample testing is justified if the number of tests is doubled at least.
  • |Armenia/epidemiology[MESH]
  • |COVID-19 Nucleic Acid Testing/*methods[MESH]
  • |COVID-19/*diagnosis/epidemiology/virology[MESH]
  • |Humans[MESH]
  • |Mass Screening/*methods[MESH]
  • |RNA, Viral/genetics[MESH]
  • |Reverse Transcriptase Polymerase Chain Reaction[MESH]
  • |SARS-CoV-2/genetics/*isolation & purification[MESH]
  • |Sensitivity and Specificity[MESH]
  • |Specimen Handling[MESH]
  • |Viral Load[MESH]


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