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SARS-CoV-2 proteins

ORF1ab (1)


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    Rapid colorimetric detection of COVID-19 MESHD coronavirus using a reverse tran-scriptional loop-mediated isothermal amplification (RT-LAMP) diagnostic plat-form: iLACO

    Authors: Lin Yu; Shanshan Wu; Xiaowen Hao; Xuelong Li; Xiyang Liu; Shenglong Ye; Heng Han; Xue Dong; Xin Li; Jiyao Li; Jianmin Liu; Na Liu; Wanzhong Zhang; Vicent Pelechano; Wei-Hua Chen; Xiushan Yin

    doi:10.1101/2020.02.20.20025874 Date: 2020-02-24 Source: medRxiv

    The recent outbreak of a novel coronavirus SARS-CoV-2 MESHD (also known as 2019-nCoV) threatens global health, given serious cause for concern. SARS-CoV-2 is a human-to-human pathogen that caused fever MESHD, severe respiratory disease MESHD and pneumonia MESHD (known as COVID-19 MESHD). By press time, more than 70,000 infected people had been confirmed worldwide. SARS-CoV-2 is very similar to the severe acute respiratory syndrome MESHD (SARS) coronavirus broke out 17 years ago. However, it has increased transmissibility as compared with the SARS-CoV, e.g. very often infected individuals without any symptoms could still transfer the virus to others. It is thus urgent to develop a rapid, accurate and onsite diagnosis methods in order to effectively identify these early infects MESHD, treat them on time and control the disease spreading. Here we developed an isothermal LAMP based method-iLACO (isothermal LAMP based method for COVID-19 MESHD) to amplify a fragment of the ORF1ab PROTEIN gene using 6 primers. We assured the species-specificity of iLACO by comparing the sequences of 11 related viruses by BLAST (including 7 similar coronaviruses, 2 influenza viruses and 2 normal coronaviruses). The sensitivity is comparable to Taqman based qPCR detection method, detecting synthesized RNA equivalent to 10 copies of 2019-nCoV virus. Reaction time varied from 15-40 minutes, depending on the loading of virus in the collected samples. The accuracy, simplicity and versatility of the new developed method suggests that iLACO assays can be conveniently applied with for 2019-nCoV threat control, even in those cases where specialized molecular biology equipment is not available.

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MeSH Disease
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SARS-CoV-2 Proteins


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