Rapid Detection of COVID-19 by RT-LAMP PCR Technique and its Comparison with Real-Time RT-PCR Method

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Ghiasi Seyyed Mohammad Saeed; Yadollahi Movahed Narges; Esmaeili Davoud

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Journal Paper

Paper Information

Journal: Iranian Journal of Medical Microbiology Year:2023 | Volume:17 | Issue:3 Page(s): 294-300

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Title

Rapid Detection of COVID-19 by RT-LAMP PCR Technique and its Comparison with Real-Time RT-PCR Method

Author(s)

Ghiasi Seyyed Mohammad Saeed | Yadollahi Movahed Narges | Esmaeili Davoud | Issue Writer Certificate

Keywords

Rapid

Detection

Abstract

2Background and Aim: Rapid antigen and antibody, serological tests, and RT ‑ PCR-based molecular methods are widely used to detect microorganisms worldwide. This study aimed to detect the covid-19 using Isothermal nucleic acid amplification techniques. Materials and Methods: In this study, we collected 200 samples of nasopharynx and oropharynx from Jamaran Heart Hospital in Tehran. Covid-19 was examined by LAMP-RT PCR and Real-Time RT-PCR techniques. The nasopharynx and oropharynx nucleic acids were extracted both by pishtaz RNA extraction kit. LAMP-RT-PCR was performed on direct samples, while Real-Time RT-PCR samples were tested only using RNA extraction samples. The probe-primer mixture of this kit was designed using a dual-target gene method that simultaneously targets the genomic sequences of the spike region and N nucleocapsid. Fluorescence was measured using Real-Time RT-PCR and LAMP-RT PCR. Results: Clinical specimens (56%) were positive using Real-Time RT-PCR technique, with mean Ct values less than 30. Clinical samples (52%) were positive for Covid-19 in the RT-LAMP technique of RNA extraction samples. RT-LAMP technique indicated a sensitivity of 92. 8%. Also in the RT-LAMP method without RNA extraction, the sensitivity of the technique was 85. 7%. Conclusion: The LAMP-RT PCR technique is emerging as an appropriate alternative to the Real-Time RT-PCR method. This technique has basic advantages, such as constant temperature amplification, thermal cycle elimination, faster results, and potentially greater Detection capacity. Therefore, the RT-LAMP-PCR can be used as a quick and cost-effective technique that can be employed in all areas

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