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Yersinia aleksiciae sp. nov
Lisa D Sprague1, Heinrich Neubauer1
1Bundeswehr Institute of Microbiology, Department of Bacteriology, Neuherbergstraße 11, D-80937 München, Germany.
Summary
Phenotypically diverse Yersinia kristensenii strains were investigated. A novel species, Yersinia aleksiciae sp. nov., is proposed based on DNA relatedness, gene sequencing, and biochemical tests.
Area of Science:
- Microbiology
- Bacterial Taxonomy
- Genomics
Background:
- Yersinia kristensenii exhibits significant phenotypic heterogeneity.
- This diversity is evident in multilocus enzyme electrophoresis and 16S rRNA gene sequence variations.
Purpose of the Study:
- To re-evaluate the taxonomic status of phenotypically heterogeneous Yersinia kristensenii strains.
- To identify and characterize a potentially novel Yersinia species.
Main Methods:
- 16S rRNA gene sequencing
- DNA-DNA hybridization
- DNA base composition determination
- Phenotypic testing (including lysine decarboxylase activity)
- Comparison with Yersinia type strains
Main Results:
- Distinct 16S rRNA gene sequence types were identified within strains originally classified as Y. kristensenii.
- Specific levels of DNA-DNA relatedness supported the differentiation of a novel species.
- Lysine decarboxylase activity was a key distinguishing phenotypic marker.
Conclusions:
- A novel bacterial species, Yersinia aleksiciae sp. nov., is proposed.
- The proposed species is distinguished by its unique 16S rRNA gene sequence, DNA-DNA relatedness, and lysine decarboxylase activity.
- This research clarifies the taxonomy within the Yersinia genus.