Whole genome sequencing and phylogenetic classification of Tunisian SARS-CoV-2 strains from patients of the Military Hospital in Tunis

Virus Genes. 2020 Dec;56(6):767-771. doi: 10.1007/s11262-020-01795-9. Epub 2020 Oct 9.

Abstract

In the present work, two complete genome sequences of SARS-CoV-2 were obtained from nasal swab samples of Tunisian SARS-CoV-2 PCR-positive patients using nanopore sequencing. The virus genomes of two of the patients examined, a Tunisian soldier returning from a mission in Morocco and a member of another Tunisian family, showed significant differences in analyses of the total genome and single nucleotide polymorphisms (SNPs). Phylogenetic relationships with known SARS-CoV-2 genomes in the African region, some European and Middle Eastern countries and initial epidemiological conclusions indicate that the introduction of SARS-CoV-2 into Tunisia from two independent sources was travel-related.

Keywords: COVID-19; Morocco; RT-qPCR; SARS-CoV-2; Sequencing; Tunisia.

Publication types

  • Case Reports

MeSH terms

  • Adult
  • Asymptomatic Diseases
  • COVID-19 / diagnosis
  • COVID-19 / epidemiology*
  • COVID-19 / transmission
  • COVID-19 / virology
  • Europe / epidemiology
  • Female
  • Genome, Viral*
  • Hospitals, Military
  • Humans
  • Male
  • Middle Aged
  • Military Personnel
  • Morocco / epidemiology
  • Pandemics*
  • Pedigree
  • Phylogeny*
  • RNA, Viral / genetics
  • SARS-CoV-2 / classification
  • SARS-CoV-2 / genetics*
  • SARS-CoV-2 / isolation & purification
  • Travel-Related Illness
  • Tunisia / epidemiology
  • Viral Load
  • Whole Genome Sequencing

Substances

  • RNA, Viral