1887

Abstract

This investigation was based on 23 isolates from several European countries collected over the past 30 years, and included characterization of all isolates. Published data on amplified fragment length polymorphism typing of isolates representing all biovars as well as protein profiles were used to select strains that were then further characterized by polyamine profiling and sequencing of 16S rRNA, , and genes. Comparison of 16S rRNA gene sequences revealed a monophyletic group within the avian 16S rRNA group of the , which currently includes the genera , and . Five monophyletic subgroups related to were recognized by 16S rRNA, , and gene sequence comparisons. Whole-genome similarity between strains of the five subgroups and the type strain of calculated from sequences allowed us to classify them within the genus . In addition, phenotypic data including biochemical traits, protein profiling and polyamine patterns clearly indicated that these taxa are related. Major phenotypic diversity was observed for 16S rRNA gene sequence groups. Furthermore, comparison of whole-genome similarities, phenotypic data and published data on amplified fragment length polymorphism and protein profiling revealed that each of the five groups present unique properties that allow the proposal of three novel species of , for which we propose the names sp. nov. (type strain F450 =CCUG 36331 =CCM 7538), sp. nov. (type strain 52/S3/90 =CCUG 55631 =CCM 7539) and sp. nov. (type strain F150 =CCUG 15564 =CCUG 36325 =NCTC 11414), a novel genomospecies 3 of and an unnamed taxon (group V). An emended description of the genus is also presented.

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2009-04-01
2019-10-19
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Supplements

vol. , part 4, pp. 735 - 744

Strains and sequences included in the reassessment of .

Whole-genome similarity values calculated between sequences of strains investigated and related type strains of , and .

DNA–DNA reassociation results from the literature compared with whole-genome similarity values calculated from gene sequence comparisons.

Phylogenetic relationships between strains of and type species of genera of based on sequences of housekeeping genes ( , , ).

[PDF file of Supplementary Tables S1–S3 and Supplementary Fig. S1](112 KB)



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