Journal of Molecular Evolution

, Volume 65, Issue 5, pp 512–518

Borrelia lusitaniae OspA Gene Heterogeneity in Mediterranean Basin Area

  • Elena Grego
  • Luigi Bertolotti
  • Simone Peletto
  • Giuseppina Amore
  • Laura Tomassone
  • Alessandro Mannelli
Article

Abstract

In this study, Borrelia lusitaniae DNA extracted from ticks and lizards was used to amplify the outer surface protein A (OspA) gene in order to increase knowledge about sequence variability in the Mediterranean basin area, to better understand how Borrelia lusitaniae has evolved and how its distribution has expanded. Phylogenetic trees including Italian and reference sequences showed a clear separation of B. lusitaniae OspA strains in two different major clades. North African isolates form a clade with Portuguese POTIB strains, whereas Italian samples are grouped with German strains and a human Portuguese strain. This subdivision was supported by very high posterior probability values in the trees, by both analysis of molecular variance and selective pressure. These results, based on phylogenetic information contained in the OspA gene sequences, show the presence of two different B. lusitaniae strains circulating in the Mediterranean basin area, suggesting two different evolution paths.

Keywords

Borrelia lusitaniae OspA Phylogenetics Analysis of molecular variance 

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Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  • Elena Grego
    • 1
  • Luigi Bertolotti
    • 1
  • Simone Peletto
    • 2
  • Giuseppina Amore
    • 1
  • Laura Tomassone
    • 1
  • Alessandro Mannelli
    • 1
  1. 1.Dipartimento di Produzioni Animali, Epidemiologia, Ecologia, Facoltà di Medicina VeterinariaUniversità degli Studi di TorinoGrugliascoItaly
  2. 2.CEA (National Reference Centre for TSEs), Istituto Zooprofilattico Sperimentale del PiemonteTurinItaly

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