COVID-19: Integrating genomic and epidemiological data to inform public health interventions and policy in Tasmania, Australia

Authors

  • Nicola Stephens Tasmanian School of Medicine, University of Tasmania, Tasmania, Australia; Public Health Services, Tasmanian Department of Health, Tasmania, Australia
  • Michelle McPherson Tasmanian School of Medicine, University of Tasmania, Tasmania, Australia; Public Health Services, Tasmanian Department of Health, Tasmania, Australia
  • Louise Cooley Tasmanian School of Medicine, University of Tasmania, Tasmania, Australia; Tasmanian Health Services, Tasmanian Department of Health, Tasmania, Australia
  • Rob Vanhaeften Tasmanian Health Services, Tasmanian Department of Health, Tasmania, Australia
  • Mathilda Wilmot Microbiological Diagnostic Unit Public Health Laboratory, Department of Microbiology & Immunology, University of Melbourne at the Doherty Institute, Victoria, Australia
  • Courtney Lane Microbiological Diagnostic Unit Public Health Laboratory, Department of Microbiology & Immunology, University of Melbourne at the Doherty Institute, Victoria, Australia
  • Michelle Harlock Public Health Services, Tasmanian Department of Health, Tasmania, Australia
  • Kerryn Lodo Public Health Services, Tasmanian Department of Health, Tasmania, Australia
  • Natasha Castree Public Health Services, Tasmanian Department of Health, Tasmania, Australia
  • Torsten Seemann Microbiological Diagnostic Unit Public Health Laboratory, Department of Microbiology & Immunology, University of Melbourne at the Doherty Institute, Victoria, Australia
  • Michelle Sait Microbiological Diagnostic Unit Public Health Laboratory, Department of Microbiology & Immunology, University of Melbourne at the Doherty Institute, Victoria, Australia
  • Susan Ballard Microbiological Diagnostic Unit Public Health Laboratory, Department of Microbiology & Immunology, University of Melbourne at the Doherty Institute, Victoria, Australia
  • Kristy Horan Microbiological Diagnostic Unit Public Health Laboratory, Department of Microbiology & Immunology, University of Melbourne at the Doherty Institute, Victoria, Australia
  • Mark Veitch Public Health Services, Tasmanian Department of Health, Tasmania, Australia
  • Fay Johnston Public Health Services, Tasmanian Department of Health, Tasmania, Australia; Menzies Institute for Medical Research, University of Tasmania, Tasmania, Australia
  • Norelle Sherry Microbiological Diagnostic Unit Public Health Laboratory, Department of Microbiology & Immunology, University of Melbourne at the Doherty Institute, Victoria, Australia
  • Ben Howden Microbiological Diagnostic Unit Public Health Laboratory, Department of Microbiology & Immunology, University of Melbourne at the Doherty Institute, Victoria, Australia

DOI:

https://doi.org/10.5365/wpsar.2021.12.4.878

Abstract

Objective: We undertook an integrated analysis of genomic and epidemiological data to investigate a large healthcare-associated COVID-19 outbreak and to better understand the epidemiology of all COVID-19 cases in Tasmania, Australia.

Methods: Epidemiological data collected on COVID-19 cases notified in Tasmania between 2 March and 15 May 2020, and positive SARS-CoV-2 samples or extracted RNA from those cases, were included.  Sequencing was conducted by tiled amplicon PCR using ARTIC v1 or v3 primers and Illumina sequencing. Consensus sequences were generated, sequences were aligned to a reference sequence, and phylogenetic analysis performed. Genomic clusters were determined and integrated with epidemiologic data to assess any additional insights.

Results: All COVID-19 cases notified in Tasmania during the study period (n=231) and 266 SARS-CoV-2 positive samples, representing 217/231 (94%) of notified cases, were included in the study; 182/217 (84%) were clustered, 21/217 (10%) were unique, 12/217 (6%) could not be sequenced.  Genomics confirmed the presence of seven epidemiological clusters, clarified transmission networks where epidemiology was unclear and additionally identified another genomic cluster which had not been identified by epidemiology alone.

Discussion: Genomic analysis provided useful additional information on COVID-19 in Tasmania including evidence of the probable source of infection in cases where epidemiological links had not been identified and that the source of a large healthcare-associated outbreak was an overseas cruise.  Genomic analysis also confirmed there was no identified community transmission from other imported cases. Genomic insights are an important component in responding to COVID-19 and ongoing genomic surveillance is warranted.

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Published

22-12-2021

How to Cite

1.
Stephens N, McPherson M, Cooley L, Vanhaeften R, Wilmot M, Lane C, Harlock M, Lodo K, Castree N, Seemann T, Sait M, Ballard S, Horan K, Veitch M, Johnston F, Sherry N, Howden B. COVID-19: Integrating genomic and epidemiological data to inform public health interventions and policy in Tasmania, Australia. Western Pac Surveill Response J [Internet]. 2021 Dec. 22 [cited 2026 Mar. 25];12(4). Available from: https://ojs.wpro.who.int/ojs/index.php/wpsar/article/view/878

Issue

Vol. 12 No. 4 (2021): October ‒ December

Section

COVID-19: Original Research

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