Staphylococcus species are pervasive bacteria that are implicated in infections across clinical, food, and environmental settings, posing significant health and safety concerns. While its prevalence is well documented, the genomic variation and evolutionary connections of S. aureus strains in African contexts remain poorly characterized. This study aims to examine the genetic variation and phylogenetic relationships of S. aureus isolates from Africa and other continents to better understand their evolutionary dynamics and potential transmission routes. A total of 747 partial 16S rRNA sequences of Staphylococcus species were retrieved from the NCBI database. After preliminary analysis, 701 sequences were excluded for high identity. Only 46 sequences included in the final analysis represented isolates from 10 African countries: Nigeria, Egypt, South Africa, Sudan, Algeria, Kenya, Tunisia, Morocco, Uganda and Madagascar. Additionally, 7 sequences were included from other continents, with three sequences each from Australia, Brazil, Saudi Arabia, China, France, Germany, and the USA. A sequence from Bacillus subtilis in Nigeria was incorporated as an outgroup for phylogenetic validation. Bioinformatics analyses were conducted via Geneious software. Preliminary findings revealed clustering patterns among African isolates, reflecting significant genetic variation across regions. The phylogenetic relationships between African and non-African strains suggested evolutionary interactions, whereas region-specific clades underscored the uniqueness of African isolates. This study highlights the genetic diversity of Staphylococcus strains across Africa and their evolutionary relationships with global isolates. These findings emphasize the importance of genomic monitoring to inform strategies for controlling S. aureus in public health, food safety, and environmental contexts.

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Genetic Diversity and Phylogenetic Relationships of Staphylococcus aureus 16S rRNA Sequences Across Africa

  • Dhaud Odei Ansong,
  • Malika Allali,
  • Khaoula Errafii,
  • Hajar Esserghini,
  • Imane Benmoussa,
  • Adnane Benmoussa,
  • Salsabil Hamdi,
  • Hassan Ghazal,
  • Najib Al Idrissi,
  • Mohammed Cherigui,
  • Fadil Bakkali

摘要

Staphylococcus species are pervasive bacteria that are implicated in infections across clinical, food, and environmental settings, posing significant health and safety concerns. While its prevalence is well documented, the genomic variation and evolutionary connections of S. aureus strains in African contexts remain poorly characterized. This study aims to examine the genetic variation and phylogenetic relationships of S. aureus isolates from Africa and other continents to better understand their evolutionary dynamics and potential transmission routes. A total of 747 partial 16S rRNA sequences of Staphylococcus species were retrieved from the NCBI database. After preliminary analysis, 701 sequences were excluded for high identity. Only 46 sequences included in the final analysis represented isolates from 10 African countries: Nigeria, Egypt, South Africa, Sudan, Algeria, Kenya, Tunisia, Morocco, Uganda and Madagascar. Additionally, 7 sequences were included from other continents, with three sequences each from Australia, Brazil, Saudi Arabia, China, France, Germany, and the USA. A sequence from Bacillus subtilis in Nigeria was incorporated as an outgroup for phylogenetic validation. Bioinformatics analyses were conducted via Geneious software. Preliminary findings revealed clustering patterns among African isolates, reflecting significant genetic variation across regions. The phylogenetic relationships between African and non-African strains suggested evolutionary interactions, whereas region-specific clades underscored the uniqueness of African isolates. This study highlights the genetic diversity of Staphylococcus strains across Africa and their evolutionary relationships with global isolates. These findings emphasize the importance of genomic monitoring to inform strategies for controlling S. aureus in public health, food safety, and environmental contexts.