1. Evolution of Subspecies of Francisella tularensis
- Author
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Kerstin Svensson, Pär Larsson, Mats Forsman, Anders Johansson, Daniel Johansson, and Mona Byström
- Subjects
Genetics ,Virulence ,biology ,Molecular Sequence Data ,Subspecies ,biology.organism_classification ,Microbiology ,Evolution, Molecular ,Bacteriology ,Francisella ,Francisella tularensis ,Molecular Biology ,Gene ,Population Genetics and Evolution ,Gene Deletion ,Genome, Bacterial ,Phylogeny ,Oligonucleotide Array Sequence Analysis - Abstract
Analysis of unidirectional genomic deletion events and single nucleotide variations suggested that the four subspecies of Francisella tularensis have evolved by vertical descent. The analysis indicated an evolutionary scenario where the highly virulent F. tularensis subsp. tularensis (type A) appeared before the less virulent F. tularensis subsp. holarctica (type B). Compared to their virulent progenitors, attenuated strains of F. tularensis exhibited specific unidirectional gene losses.
- Published
- 2005
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