ISSN: 0973-7510

E-ISSN: 2581-690X

Research Article | Open Access
Shekhar Pal1, Geetika Rana1 , Shweta Singhal1, Minakshi Singh1, Manish Kumar1 and Shweta Thaledi2
1Department of Microbiology, Government Doon Medical College, Dehradun, Uttarakhand, India.
2Viral Research Diagnostic Laboratories, Department of Microbiology, Government Doon Medical College, Dehradun, Uttarakhand, India.
Article Number: 9129 | © The Author(s). 2024
J Pure Appl Microbiol. 2024;18(1):682-695.
Received: 13 November 2023 | Accepted: 19 February 2024 | Published online: 03 March 2024
Issue online: March 2024

The etiological agent of coronavirus disease (COVID-19) that emerged at the end of year 2019 was first reported in Wuhan, China and was found to be SARS-CoV-2 (severe acute respiratory syndrome coronavirus-2). The massive COVID-19 waves were due to various variants. As per the reports of other study it was also found that Omicron variant spread faster than various other variant such as delta variant. Omicron has been reported from various countries and now from many states of India too. Therefore, keeping this in mind, this study was undertaken to study all the lineages of SARS-CoV-2 Omicron variant of disease COVID-19 that are circulating in the population of Uttarakhand with objective to study next generation sequencing of all the RT-PCR positive of SARS-CoV-2 and to find out all the lineages of the Omicron variant of SARS-CoV-2. This was a retrospective study conducted from 1st January 2022 to 30th September 2022. Next generation sequencing was performed on all the samples that were tested for COVID-19 by using Ion AmpliSeq kit on Ion Chef instrument. A total of 2149 samples were tested in which majority of samples belong to age group of 21-40 years. Males were affected more than females. BA.2 was found to be the predominant lineage of total of 46 lineages that were identified. Their mutations were also studied. We conclude that different variants of clade 21L, 22B, 22D and Omicron subvariant BA.2, BA.2.38 and BA.2.75 were the ones that were circulating amongst the population of Uttarakhand. The characteristic mutation that was found were T19I and V213G in NTD, S373P, S375F, T376A, and D405N in RBD.


SARS-CoV-2, Omicron, Lineages, Mutations, Genome Sequencing, Molecular Epidemiology

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© The Author(s) 2024. Open Access. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License which permits unrestricted use, sharing, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.